2024

• C. Amsler, H. Breuker, M. Bumber, S. Chesnevskaya, G. Costantini, R. Ferragut, M. Giammarchi, A. Gligorova, G. Gosta, H. Higaki, M. Hori, E. D. Hunter, C. Killian, V. Kraxberger, N. Kuroda, A. Lanz, M. Leali, G. Maero, C. Malbrunot, V. Mascagna, Y. Matsuda, V. Mackel S. Migliorati, D. J. Murtagh, Y. Nagata, A. Nanda, L. Nowak, M. Rome, M. C. Simon, M. Tajima, V. Toso, S. Ulmer, L. Venturelli, A. Weiser, E. Widmann, Y. Yamazaki, “Injection and capture of antiprotons in a Penning-Malmberg trap using a drift tube accelerator and degrader foil”, Nucl. Instrum. Methods Phys. Res. A 1065 (2024) 169529. (7 pages)
• M. Kuroda, A. Kasagaki, H. Okamoto, and K. Ito, “Table-top ion-trap experiment on the stability of intense short bunches in linear hadron accelerators”, Phys. Rev. Accel. Beams 27, 054201 (2024). (10 pages)
• A. Kasagaki and H. Okamoto, “Simple design criterion for high-intensity hadron linacs”, Prog. Theor. Exp. Phys. 2024 073G01. (19 pages)

2023

• H. Higaki, K. Kojima, H. Okamoto, and H. Yoshinaga, “ Observation and Modeling of External Rotating-Field-Driven Nonlinear Resonances in a Penning Trap. ”, J. Phys. Soc. J. 92 (2023) 114301. (6 pages)
• N. Miyawaki , Y. Ishii, Y. Yuri, K. Narumi, K. Muroo, K. Ito, and H. Okamoto, “Calculation study of selective ion extraction from ion source with Paul-trap-type laser cooling device”, Nucl. Instrum. Methods Phys. Res. B 542, (2023) 183. (5 pages)
• K. Muroo, H. Okamoto, N. Miyawaki, and Y. Yuri, "Simulation study of ultrahigh-precision single-ion extraction from a linear Paul trap", Prog. Theor. Exp. Phys. 2023, 063G01. (16 pages)
• H. Higaki, K.Michishio, A. Ishida, and N. Oshima, “ The buncher and the magnetic lens for the LINAC based low energy positron beams at AIST. ”, Plasma and Fusion Res. 18 (2023) 1406023. (6 pages)

2022

• K.Michishio, H. Higaki, A. Ishida, and N. Oshima, “ Efficient positron trapping and extraction with a center-hole SiC remoderator”, New J. Phys. 24 (2022) 123039. (11 pages)
• C. Amsler, H. Breuker, S. Chesnevskaya, G. Costantini, R. Ferragut, M. Giammarchi, A. Gligorova, G. Gosta, H. Higaki, E. D. Hunter, C. Killian, V. Kletzl, V. Kraxberger, N. Kuroda, A. Lanz, M. Leali, V. Mackel, G. Maero, C. Malbrunot, V. Mascagna, Y. Matsuda, S. Migliorati, D. J. Murtagh, Y. Nagata, A. Nanda, L. Nowak, E. Pasino, M. Rome, M. C. Simon, M. Tajima, V. Toso, S. Ulmer, L. Venturelli, A. Weiser, E. Widmann, T. Wolz, Y. Yamazaki, and J. Zmeskal, “Reducing the background temperature for cyclotron cooling in a cryogenic Penning-Malmberg trap”, Phys. Plasmas 29 (2022) 083303. (12 pages)
• M. Goto, C. Ichikawa, K. Ito, K. Kojima, and H. Okamoto, “Stability study of intense hadron bunches in linear accelerators using a Paul ion trap”, (Editors’ suggestion) Phys. Rev. Accel. Beams 25, 054201 (2022). (10 pages)
• K. Kojima and H. Okamoto, “Characterization of overlapping betatron resonances above the phase advance of 90° per cell”, Phys. Rev. Accel. Beams 25, 024201 (2022). (12 pages)
• K. Kojima, M. Goto, H. Higaki, K. Ito, and H. Okamoto, “A linear Paul trap without the use of the transverse quadrupole field”, Plasma and Fusion Res. 17 (2022) 1406003. (5 pages); DOI: 10.1585/ pfr.17.1406003

2021

• Y. Yamane, H. Okamoto, and K. Kojima, “Excitation and suppression of synchrobetatron resonances in high-intensity hadron linacs”, Phys. Rev. Accel. Beams 24, 084201 (2021). (14 pages)
• M. Goto, K. Ito, K. Kojima, and H. Okamoto, “Experimental demonstration of nonlinear resonances in a linear Paul trap”, J. Phys. Soc. Jpn. 90, 094501 (2021). (7 pages)
• H. Okamoto, H. Higaki, K. Ito, K. Kojima, M. Matsuba, and Y. Tokashiki, “Application of a compact ion trap to fundamental beam-dynamics studies”, JPS Conf. Proc. 35, 011007 (2021). (8 pages)
• T. Ikeda, K. Ito, and H. Okamoto, “Novel tabletop experiment demonstrating the nonlinear resonance excitation observed at the CERN Proton Synchrotron”, Jpn. J. Appl. Phys. 60, 070901 (2021). (5 pages)
• B. Kolbinger, C. Amsler, S. Arguedas Cuendis, H. Breuker, A. Capon, G. Costantini, P. Dupre, M. Fleck, A. Gligorova, H. Higaki, et al., " Measurement of the principal quantum number distribution in a beam of antihydrogen atoms ", Eur. Phys. J. D 75 (2021) 91.

2020

• H. Okamoto, M. Aoki, C. Ichikawa, K. Kojima, T. Kurauchi, and Y. Yamane, “Coherent and incoherent space-charge effects in high-intensity hadron rings”, Journal of Instrumentation 15, P07017 (2020).
• K. Kojima, H. Okamoto, and Y. Tokashiki, “Reply to Comment on ‘Empirical condition of betatron resonances with space charge’”, Phys. Rev. Accel. Beams 23 (2020) 028002. (5 pages)
• H. Higaki, K. Michishio, K. Hashidate, A. Ishida, and N. Oshima, " Accumulation of LINAC based low energy positrons in a buffer gas trap", Appl. Phys. Express 13 (2020) 066003.
• H. Nagoshi, M. Kuribayashi, M. Kuriki, P. V. Martyshkin, T. Omori, T. Takahashi, M. Yamakata, K. Yokoya, “A design of an electron driven positron source for the internationallinear collider”, Nucl. Instr. and Meth. A, 953 (2020) 163134.

2019

• M. Kuriki, K. Masaki, “Negative Electron affinity GaAs Cathode Activation with CsKTe Thin　Film”, J. Phys. Conf. Ser. 1350, 012047　(2019).
• K. Ito, T. Masuda, H. Higaki, and H. Okamoto, “Accumulating laser-coolable ions in a linear Paul trap for ultrahigh-density beam dynamics experiment”, J. Phys. Conf. Series 1350, 012126 (2019). (5 pages)
• K. Ito, T. Kurauchi, H. Higaki, and H. Okamoto, “Experimental observation of low-order collective oscillation modes in a strong-focusing lattice”, J. Phys. Conf. Series 1350, 012125 (2019). (6 pages)
• H. Okamoto, K. Kojima, and K. Ito, “A compact Paul ion trap for the study of space-charge effects in drift-tube linear accelerators”, Prog. Theor. Exp. Phys. 2019, 093G01. (14 pages)
• H. Higaki, K. Ito, and H. Okamoto, " Non-neutral electron plasmas confined with a nested potential in a uniform magnetic field", Jpn. J. Appl. Phys. 58 (2019) 080912.
• K. Kojima, H. Okamoto, and Y. Tokashiki, “Empirical condition of betatron resonances with space charge”, Phys. Rev. Accel. Beams 22 (2019) 074201. (28 pages)
• M. Tajima, N. Kuroda, C. Amsler, H. Breuker, C. Evans, M. Fleck, A. Gligorova, H. Higaki, Y. Kanai, B. Kolbinger, A. Lanz, M. Leali, V. Mackel, C. Malbrunot, V. Mascagna, Y. Matsuda, D. Murtagh, Y. Nagata, A. Nanda, B. Radics, M. Simon, S. Ulmer, L. Venturelli, E. Widmann, M. Wiesinger and Y. Yamazaki " Antiproton beams with lowenrgy spread for antihydrogen production ", J. Instrum. 14 (2019) P05009

2018

• L. K. Martin, S. L. Sheehy, D. J. Kelliher, S. Machida, K. Ito, and H. Okamoto, “A new method to measure the beta function in a Paul trap”, J. Phys. Conf. Series 1067, 062016 (2018).
• Y. Nagata, N. Kuroda, B. Kolbinger, M. Fleck, C. Malbrunot, V. Mackel, C. Sauerzopf, M. C. Simon, M. Tajima, J. Zmeskal, H. Breuker, H. Higaki, Y. Kanai, Y. Matsuda, S. Ulmer, L. Venturelli, E. Widmann, and Y. Yamazaki, " Monte-Carlo based performance assessment of ASACUSA's antihydrogen detector", Nucl. Instrum. Methodes Phys. Res. A 910 (2018) 90. (6 pages)
• V. Mackel, B. Radics, P. Dupre, H. Higaki, Y. Kanai, N. Kuroda, Y. Matsuda, Y. Nagata, M. Tajima, E. Widmann, and Y. Yamazaki, " Imaging antimatter with a Micromegas detector", Nucl. Instrum. Methodes Phys. Res. B 422 (2018) 1. (6 pages)
• K. Ito, M. Matsuba, H. Okamoto, “Effect of quadrupole focusing-field fluctuation on the transverse stability of intense hadron beams in storage rings”, Prog. Theor. Exp. Phys. 2018, 023G01 (13 pages).DOI: 10.1093/ptep/pty004
• M. Akemoto, D. Arakawa, S. Asaoka, E. Cenni, M. Egi, K. Enami, K. Endo, S. Fukuda, T. Furuya, K. Haga, R. Hajima, K. Hara, K. Harada, T. Honda, Y. Honda, T. Honma, K. Hosoyama, E. Kako, H. Katagiri, H. Kawata, Y. Kobayashi, Y. Kojima, Y. Kondou, O. Tanaka, T. Kume, M. Kuriki, H. Matsumura, H. Matsushita, S. Michizono, T. Miura, T. Miyajima, S. Nagahashi, R. Nagai, H. Nakai, H. Nakajima, N. Nakamura, K. Nakanishi, K. Nigorikawa, N. Nishimori, T. Nogami, S. Noguchi, T. Obina, F. Qiu, H. Sagehashi, H. Sakai, S. Sakanaka, S. Sasaki, K. Satoh, M. Sawamura, M. Shimada, K. Shinoe, T. Shishido, M. Tadano, T. Takahashi, R. Takai, T. Takenaka, Y. Tanimoto, T. Uchiyama, A. Ueda, K. Umemori, K. Watanabe, M. Yamamoto, “Construction and commissioning of the compact energy-recovery linac at KEK”, NIMA, 887 (2018) pp. 197-219, DOI;10.1016/j.nima.2017.08.051.
• M. Kuriki, “ENERGY SPREAD COMPENSATION IN ARBITRARY FORMAT MULTI-BUNCH ACCELERATION WITH STANDING WAVE AND TRAVELING WAVE ACCELERATORS”, 9th International Particle Accelerator Conference IPAC2018, Vancouver, BC, Canada JACoW Publishing, ISBN: 978-3-95450-184-7 doi:10.18429/JACoW-IPAC2018-MOPMF076.
• H. Nagoshi, M. Kuriki, T. Takahashi, K. Negishi, T. Omori, M. Satoh, Y. Seimiya, J. Urakawa, Y. Sumitomo, S. Kashiwagi, “A DESIGN STUDY OF THE ELECTRON-DRIVEN ILC POSITRON SOURCE INCLUDING BEAM LOADING EFFECT”, 9th International Particle Accelerator Conference IPAC2018, Vancouver, BC, Canada JACoW Publishing, ISBN: 978-3-95450-184-7 doi:10.18429/JACoW-IPAC2018-MOPMF077.
• L. Guo, M. Kuriki, H. Iijima, K. Uchida, “NEA SURFACE ACTIVATION OF GaAs PHOTOCATHODE WITH CO2”, 9th International Particle Accelerator Conference IPAC2018, Vancouver, BC, Canada JACoW Publishing, ISBN: 978-3-95450-184-7 THPMK11.

2017

• C. Kaga, H. Higaki, K. Fukushima, K. Osaki, K. Ito, and H. Okamoto, “Simulations on Mixing Charged Particles in a Nested Penning Trap”, JPS Conf. Proc. 18 (2017) 011013. (6 pages).
• K. Ito, H. Okamoto, Y. Tokashiki, and K. Fukushima, “Coherent resonance stop bands in alternating gradient beam transport”, Phys. Rev. Accel. Beams 20 (2017) 064201. (18 pages)
• C. Kaga, “Simulations on the Mixing Processes of Electrons and Positrons in a Magnetic Mirror Trap”, Plasma and Fusion Res. 12 (2017) 1401001. (5 pages).
• H. Higaki, C. Kaga, K. Fukushima, H. Okamoto, Y. Nagata, Y. Kanai, and Y. Yamazaki, “Simultaneous confinement of low-energy electrons and positrons in a compact magnetic mirror trap ”, New J. Phys. 19 (2017) 023016. (9 pages)
• L. Guo, M. Kuriki,, A. Yokota, M. Urano, K. Negishi, “Substrate Dependence of CsK2Sb photo-cathode performance”, Prog. Theor. Exp. Phys. (2017) 033G01(10pages), DOI: 10.1093/ptep/ptx030

2016

• K. Moriya, M. Ota, K. Fukushima, M. Yamaguchi, K. Ito, and H. Okamoto, “Double stop-band structure near half-integer tunes in high-intensity rings”, (Editors’ suggestion) Phys. Rev. Accel. Beams 19 (2016) 114201. (13 pages)
• K. Gomberoff, H. Higaki, C. Koga, K. Ito, and H. Okamoto, “Autoresonances of m=2 diocotron oscillations in non-neutral electron plasmas”, Phys. Rev. E 94 (2016) 043204. (6 pages)
• L. Guo, M. Kuriki, H. Iijima, K. Uchida, “NEA Surface Activation of GaAs photocathode with different gases”, Surface Science (2017) S0039-6028(17)30005-5, DOI:10.1016/j.susc.2017.06.001.

2015

• K. Fukushima and H. Okamoto, “Design study of a multipole ion trap for beam physics applications”, Plasma and Fusion Res. 10 (2015) 1401081. (9 pages)
• K. Ito, T. Okano, K. Moriya, K. Fukushima, H. Higaki and H. Okamoto, "Experimental study on dipole motion of an ion plasma confined in a linear Paul trap", Hyperfine Interact. 236 (2015) 29. (9 pages
• H.Higaki, Y. Abo, K. Ito, H. Okamoto, and K. Gomberoff, " Autoresonances with a Damping Force ", AIP Conference Proceedings #1668 (2015) 050006. (6 pages)
• H.Higaki, K. Nagayasu, T. Iwai, K. Ito, and H. Okamoto, " Production of Ar^q+ ions with a Tandem Linear Paul Trap ", AIP Conference Proceedings #1668 (2015) 040006. (6 pages)
• H.Higaki, C. Kaga, K. Nagayasu, H. Okamoto, Y. Nagata, Y. Kanai, and Y. Yamazaki, " A Low Energy Positron Accumulator for the Plasma Confinement in a Compact Magnetic Mirror Trap ", AIP Conference Proceedings #1668 (2015) 040005. (6 pages)
• C. Kaga, K. Ito, H.Higaki, and H. Okamoto, "Annular Vortex Merging Processes in Non-Neutral Electron Plasmas ", AIP Conference Proceedings #1668 (2015) 030003. (5 pages)
• K. Moriya, K. Fukushima, K. Ito, T. Okano, H. Okamoto, S. L. Sheehy, D. J. Kelliher, S. Machida, and C. R. Prior, “Experimental study of integer-resonance crossing in a non-scaling fixed field alternating gradient accelerator with a Paul ion trap”, Phys. Rev. ST Accel. Beams 18 (2015) 034001. (13 pages).
• C. Kaga, Y. Soga, K. Ito, H. Higaki, and H. Okamoto, “Phase space volumes of non-neutral electron plasmas during vortex merging processes”, Plasma and Fusion Res. : Rapid Commun. 10 (2015) 1201004. (3 pages).
• K. Osaki and H. Okamoto, “Free-energy formula for emittance-growth estimation in intense mismatched beams”, Prog. Theor. Exp. Phys. 2015, 093G01. (12 pages).
• Y. Seimiya, M. Kuriki, T. Takahashi, T. Okugi, T. Omori, M. Satoh, J. Urakawa, S. Kashiwagi, “Positron Capture Simulation for ILC Electron-Driven Positron Source”, Prog. Theor. Exp. Phys. (2015) 103G01 doi: 10.1093/ptep/ptv136 First published online October 12, 2015.
• Hirotaka Shimizua, Mitsuo Akemotoa, Yasuo Araia, Sakae Arakia, Alexander Arysheva, Masafumi Fukudaa, Shigeki Fukudaa, Junji Habaa, Kazufumi Haraa, Hitoshi Hayanoa, Yasuo Higashia, Yosuke Hondaa, Teruya Honmaa, Eiji Kakoa, Yuji Kojimaa, Yoshinari Kondoa, Konstantin Lekomtseva, Toshihiro Matsumotoa, Shinichiro Michizonoa, Toshinobu Miyoshia, Hirotaka Nakaia, Hiromitsu Nakajimaa, Kota Nakanishia, Shuichi Noguchia, Toshiyuki Okugia, Masato Satoa, Mikhail Sheveleva, Toshio Shishidoa, Tateru Takenakaa, Kiyosumi Tsuchiyaa, Junji Urakawaa, Ken Watanabea, Seiya Yamaguchia, Akira Yamamotoa, Yasuchika Yamamotoa, Kazuyuki Sakaueb, Seiichi Hosodac, Hokuto Iijimac, Masao Kurikic, Ryuta Tanakac, Ayaka Kuramotod, Mathieu Ometd, Ayaki Takedad, “X-ray generation by inverse Compton scattering at the superconducting RF test facility”, Nucl. Inst. and Meth. A, Volume 772, 1 February 2015, Pages 26–33.

2014

• H. Okamoto, K. Ito, K. Fukushima, and T. Okano, “Recent results from the S-POD trap systems on the stability of intense hadron beams”, invited paper for the 54thICFA Advanced Beam Dynamics Workshop on High-Intensity, High-Brightness and High-Power Hadron Beams (HB2014), November 2014, TUO2LR03 (2014) pp. 178 – 182. (ISBN 978-3-95450-173-1).
• Nobuyuki Nishimori, Ryoji Nagai, Shunya Matsuba, Ryoichi Hajima, Masahiro Yamamoto, Yosuke Honda, Tsukasa Miyajima, Hokuto Iijima, Masao Kuriki, and Makoto Kuwahara, “Experimental investigation of an optimum configuration for a high-voltage photoemission gun for operation at ≥500 kV”, Phys. Rev. ST Accel. Beams 17, 053401
• H. Okamoto, K. Fukushima, H. Higaki, K. Ito, K. Moriya, T. Okano, and K. Osaki, “Beam dynamics studies with non-neutral plasma traps”, (invited paper) Proc. 5th International Particle Accelerator Conf. (2014) pp. 4052 – 4056.
• K. Osaki and H. Okamoto, “Parameter optimization for Doppler laser cooling of a low-energy heavy ion beam at the storage ring S-LSR”, Prog. Theor. Exp. Phys. 2014, 053G01 (16 pages).
• N. Kuroda, S. Ulmer, D.J. Murtagh, S. Van Gorp, Y. Nagata, M. Diermaier, S. Federmann, M. Leali, C. Malbrunot, V. Mascagna, K. Michishio, T. Mizutani, A. Mohri, H. Nagahama, M. Ohtsuka, B. Radics, S. Sakurai, C. Sauerzopf, K. Suzuki, M. Tajima, H.A. Torii, L. Venturelli, B. Wunschek, J. Zmeskal, N. Zurlo, H. Higaki, Y. Kanai, E. Lodi Rizzini, Y. Nagashima, Y. Matsuda, E. Widmann, and Y. Yamazaki, "A source of antihydrogen for in-fligh hyperfine spectroscopy", Nat. Commun. 5 (2014) 3089.
• H. Okamoto, M. Endo, K. Fukushima, H. Higaki, K. Ito, K. Moriya, S. Yamaguchi, and S. M. Lund, “Experimental simulation of beam propagation over long path lengths using radio-frequency and magnetic traps”, Nucl. Instrum. Meth. A, 733 (2014) 119-128.
• K. Fukushima, K. Ito, H. Okamoto, S. Yamaguchi, K. Moriya, H. Higaki, T. Okano, and S. M. Lund, “Experimental verification of resonance instability bands in quadrupole doublet focusing channels”, Nucl. Instrum. Meth. A, 733 (2014) 18-24.

2013

• H. Okamoto, “Beam Crystallization. Are We There Yet?”, (invited paper) Proc. International Workshop on Beam Cooling and Related Topics (COOL 13) pp. 152 – 156 (2013).
• H. Souda, M. Nakao, H. Tongu, K. Jimbo, K. Osaki, H. Okamoto, Y. Yuri, H. Zhengqi, M. Grieser, and A. Noda, “Efficiency enhancement of indirect transverse laser cooling with synchro-betatron resonant coupling by suppression of beam intensity”, Jpn. J. Appl. Phys. 52 (2013) 030202. (4 pages)
• Masao Kuriki, Hokuto Iijima, Seiichi Hosoda, Ken Watanabe, Hitoshi Hayano, Junji Urakawa, Goro Isoyama, Ryuko Kato, Keigo Kawase, Ayaka Kuramoto, Shigeru Kashiwagi, Kazuyuki Sakaue, "1 ms Pulse Beam Generation and Acceleration by Photo-cathode RF gun and Super-conducting Accelerator",Japanese Journal of Applied Physics, 52(5) (2013) 056401.
• Nobuyuki Nishimori, Ryoji Nagai, Shunya Matsuba, Ryoichi Hajima, Masahiro Yamamoto, Tsukasa Miyajima, Yosuke Honda, Hokuto Iijima, Masao Kuriki, and Makoto Kuwahara,"Generation of a 500-keV electron beam from a high voltage photoemission gun",Appl. Phys. Lett. 102, 234103(2013)

2012

• H. Okamoto, M. Endo, K. Fukushima, H. Higaki, K. Ito, K. Moriya, T. Okano, S. Yamaguchi, and A. Mohri, “Plasma traps for space-charge studies: status and perspectives”, invited paper for the 52nd ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams (HB2012), September 2012, TUO1A04 (2012) pp. 235 – 239.
• M. Nakao, T. Hiromasa, H. Souda, M. Tanabe, T. Ishikawa, H. Tongu, A. Noda, K. Jimbo, T. Shirai, M. Grieser, H. Okamoto, and A. V. Smirnov, “Resonance coupling induced enhancement of indirect transverse cooling in a laser-cooled ion beam”, Phys. Rev. ST Accel. Beams. 15 (2012) 110102. (8 pages)
• H. Higaki, S. Sakurai, K. Ito, and H. Okamoto, " Nonneutral Electron Plasmas Confined in a Compact Magnetic Mirror Trap ", Appl. Phys. Exress 5 (2012) 106001
• H. Takeuchi, K. Fukushima, K. Ito, K. Moriya, H. Okamoto, and H. Sugimoto, " Experimental study of resonance crossing with a Paul trap " , Phys. Rev. ST Accel. Beams 15 (2012) 074201
• N. Kuroda, H. A. Torii, Y. Nagata, M. Shibata, Y. Enomoto,H. Imao, Y. Kanai, M. Hori, H. Saitoh, H. Higaki, A. Mohri, K. Fujii, C. H. Kim, Y. Matsuda, K. Michishio, Y. Nagashima, M. Ohtsuka, K. Tanaka, and Y. Yamazaki, " Development of a monoenergetic ultraslow antiproton beam source for high-precision investigation " , Phys. Rev. ST Accel. Beams 15 (2012) 024702. selected for one of the six "Outstanding PRST-AB Articles from 2012 (APS web cite)".

2011

• H. Okamoto, H. Higaki, and K. Ito, “Non-neutral plasma traps for accelerator-free experiments on space-charge-dominated beam dynamics”, invited paper for PAC2011, Proc. 2011 Particle Accelerator Conf. (2011) pp. 46 ? 50.
• M. Kuriki, C. Shonaka, H. Iijima, D. Kubo, H. Okamoto, H. Higaki, K. Ito, M. Yamamoto, T. Konomi, S. Okumi, M. Kuwahara, and T. Nakanishi, “Dark-lifetime degradation of GaAs photo-cathode at high temperature”, Proceedings of Workshop on Ultrafast Electron and Photon Beams (Xian, China), Nucl. Instrum. Meth. A 637 (2011) pp. S87 ? S90., Final version published online: 11-MAY-2011, DOI information: 10.1016/j.nima.2010.02.029

2010

• Kenji IZAWA, Kiyokazu ITO, Hiroyuki HIGAKI, and Hiromi OKAMOTO, " Controlled Extraction of Ultracold Ions from a Linear Paul Trap for Nanobeam Production " , J. Phys. Soc. J. 79 (2010) 124502
• Y. Enomoto, N. Kuroda, K. Michishio, C. H. Kim, H. Higaki, Y. Nagata, Y. Kanai, H. A. Torii, M. Corradini, M. Leali, E. Lodi-Rizzini, V. Mascagna, L. Venturelli, N. Zurlo, K. Fujii, M. Ohtsuka, K. Tanaka, H. Imao, Y. Nagashima, Y. Matsuda, B. Juha?Lsz, A. Mohri, and Y. Yamazaki, " Synthesis of Cold Antihydrogen in a Cusp Trap " , Phys. Rev. Lett. 105 (2010) 243401
• H. Higaki, K. Ito, and H. Okamoto, " Electrostatic Oscillations Observed in Non-Neutral Electron Plasmas Confined in a Magnetic Field Gradient " , Plasma and Fusion Res. 5 (2010) 029
• H. Sugimoto and H. Okamoto, “Indirect Transverse Laser Cooling of Ions in a Linear Paul Trap”, J. Phys. Soc. Jpn. 79 (2010) 084501.
• S. Ohtsubo, M. Fujioka, H. Higaki, K. Ito, H. Okamoto, H. Sugimoto and S. M. Lund, “Experimental study of coherent betatron resonances with a Paul trap”, Phys. Rev. STAB 13 (2010) 044201. (12 pages)
• H. Higaki, K. Fukata, K. Ito, H. Okamoto and K. Gomberoff, “Density and potential profiles of non-neutral electron plasmas in a magnetic mirror field”, Phys. Rev. E 81 (2010) 016401-1~8.
• H. Okamoto, H. Sugimoto, Y. Yuri, M. Ikegami, and J. Wei, “Modeling of ultra-cold and crystalline ion beams”, (invited paper) Proc. 10th International Computational Accelerator Physics Conference (ICAP’09), pp. 151 ? 156 (2010).

2009

• K. Ito, S. Ohtsubo, H. Higaki, K. Izawa, and H. Okamoto, “Tune depression of ion plasmas observed in a linear Paul trap”, J. Plasma Fusion Res., Vol. 8 (2009) pp. 959 − 962.
• H. Okamoto, H. Sugimoto, and Y.Yuri, “Coulomb coupling and heating of charged particle beams in the presence of dispersion”, J. Plasma Fusion Res., Vol. 8 (2009) pp. 950 − 954.
• K. Izawa, H. Higaki, H. Yamate, H. Hitomi, K. Ito, M. Kuriki, and H. Okamoto, "A tandem linear Paul trap as ion source", J. Phys. Conf. 163(2009) 012102.
• Y. Yuri, H. Okamoto and H. Sugimoto, “Simulation Study of Emittance Growth from Coulomb Collisions in Low-Temperature Ion Beams”, J. Phys. Soc. Jpn. 78 (2009) 124501.
• Kenichi Kaneta, Hiromi Okamoto, Masao Kuriki, and Andrew M. Sessler, “Application of Coupling Resonance to Electron-Beam Conditioning for Free Electron Laser”, J. Phys. Soc. Jpn, 78 (2009) 124503.

2008

• K. Ito, K. Nakayama, S. Ohtsubo, H. Higaki, and H. Okamoto, "Determination of transverse distributions of ion plasmas confined in a linear Paul trap by imaging diagnostics", Jpn. J. Appl. Phys. Vol. 47, No. 10 (2008) pp. 8017 - 8025.
• M. Ikegami, H. Sugimoto, and H. Okamoto, ＜Three-dimensional laser cooling of ion beams using a Wien filterｃ, J. Phys. Soc. Jpn. 77 (2008) 074502.
• H. Higaki, K. Ito, K. Kira, and H. Okamoto, "Accumulating Low Energy Charged Particles with a Magnetic Mirror Trap and Cyclotron Resonance Heating", Appl. Phys. Express 1 (2008) pp. 066002-1 − 066002-3.

2007

• H. Higaki, K. Ito, R. Takai, K. Nakayama, W. Saiki, K. Izawa, and H. Okamoto, "Axial resonances of Ar+ ions observed in a linear Paul trap", Hyperfine Interactions 174 (2007) pp. 77 - 82.
• H. Okamoto, K. Kaneta, and A. M. Sessler, "Phase-space manipulation of charged-particle beams by means of coupling resonances", J. Phys. Soc. Jpn. 76 (2007) 074501.
• H. Higaki, K. Ito, W. Saiki, Y. Omori, and H. Okamoto, "Properties of nonneutral electron plasmas confined with a magnetic mirror field", Phys. Rev. E 75 (2007) 066401.
• R. Takai, K. Nakayama, W. Saiki, K. Ito, and H. Okamoto, "Nonlinear resonance effects in a linear Paul trap", J. Phys. Soc. Jpn. 76 (2007) 014802.

2006

• M. Ikegami, H. Okamoto, and Y. Yuri, "Crystalline beams in dispersion-free storage rings", Phys. Rev. STAB 9 (2006) 124201.
• R. Takai, H. Enokizono, K. Ito, Y. Mizuno, K. Okabe, and H. Okamoto, "Development of a compact plasma trap for experimental beam physics", Jpn. J. Appl. Phys., 45, No. 6A (2006) pp. 5332 - 5343.
• Y. Wada, Y. Shigemoto, A. Ogata, "Ion production enhancement by rear-focusing and prepulse in ultrashort-pulse laser interaction with foil targets", AIP Conf. Proc. 737 (2006) pp. 832 - 838.
• X.-P. Li, H. Enokizono, H. Okamoto, Y. Yuri, A. M. Sessler and J. Wei, "Phonon spectrum and the maintenance condition of crystalline beams", Phys. Rev. STAB 9 (2006) 034201.
• M. Adachi, M. Miura, S. Kato, K. Koyama, S. Masuda, T. Watanabe, H. Okamoto, A. Ogata and M. Tanimoto, "Cascade acceleration of electrons by laser wakefield and direct laser field", Jpn. J. Appl. Phys. 45, No. 5A (2006) pp. 4214 - 4218.
• T. Shirai, S. Fujimoto, M. Ikegami, A. Noda, H. Souda, M. Tanabe, H. Tongu, K. Noda, S. Shibuya, T. Takeuchi, T. Fujimoto, S. Iwata, A. Takubo, H. Okamoto,Y. Yuri, and M. Grieser, "S-LSR: Cooler ring development at Kyoto University", AIP Conf. Proc. 821 (2005) pp. 103 - 107.
• A. Noda, S. Fujimoto, M. Ikegami, T. Shirai, H. Souda, M. Tanabe, H. Tongu, K. Noda, S. Yamada, S. Shibuya, T. Takeuchi, H. Okamoto, and M. Grieser, "Laser cooling for 3D crystalline state at S-LSR", AIP Conf. Proc.821 (2005) pp. 491 - 500.
• M. Adachi, E. Miura, S. Kato, K. Koyama, S. Masuda, T. Watanabe, A. Ogata, H. Okamoto, and M. Tanimoto, "Monoenergetic electron beam generation in a laser-driven plasma acceleration", Laser Phys. Lett. 3, No. 2 (2006) pp. 79 - 85.

2005

• Y. Yuri and H. Okamoto, "Feasibility of beam crystallization in a cooler storage ring", Phys. Rev. STAB 8 (2005) 114201.
• H. Okamoto, "Space-charge simulations and experiments at Hiroshima University", AIP Conf. Proc. 773 (2005) pp. 142 - 146.
• H. Okamoto, S. Ochi and Y. Yuri, "Coulomb coupling constant for spatially confined single-species plasmas", J. Phys. Soc. Jpn. 74, No.7 (2005) pp. 2099-2100.
• H. Okamoto, "Frozen beams", (invited paper) Proc. 2005 Particle Accelerator Conf. (2005) pp. 4 - 8.
• Y. Wada, "Optimum target position of ion production in ultrashort-pulse laser interaction with foil targets under the existence of prepulses", Jpn. J. Appl. Phys. 44, No.5A (2005) pp. 3299 - 3306.

2004

• M. Ikegami, A. Noda, M. Tanabe, M. Grieser, and H. Okamoto, "Heavy ion storage ring without linear　dispersion", Phys. Rev. STAB 7 (2004) 120101.
• Y. Yuri and H. Okamoto, "Generating Ultralow-Emittance Ion Beams in a Storage Ring", Phys. Rev. Lett. 93 (2004) 204801.
• R. Takai, K. Ito, Y. Iwashita, H. Okamoto, S. Taniguchi, and Y. Tomita, "Design and fabrication of a linear Paul trap for the study of space-charge-dominated beams", Nucl. Instrum. Meth. A 532 (2004) pp. 508 - 512.
• T. Shirai, H. Fadil, M. Ikegami, H. Tongu, Y. Iwashita, A. Noda, K. Noda, S. Shibuya, T. Takeuchi, K. Okabe, Y. Yuri, H. Okamoto, M. Grieser, and E. M. Syresin, "S-LSR: test ring for beam crystal, its design and ordering simulation", Nucl. Instrum. Meth. A 532 (2004) pp. 488 - 491.
• H. Okamoto, "Theoretical aspects of beam crystallization", Nucl. Instrum. Meth. A 532 (2004) pp. 32 - 39.
• Y. Wada, Y. Shigemoto and A. Ogata, "Ion Production Enhancement by Rear-Focusing and Prepulse in Ultrashort-Pulse Laser Interaction with Foil Targets", Jpn. J. Appl. Phys. 43 (2004) L996 - L999.
• H. Okamoto, K. Okabe, Y. Yuri, D. Mo¨hl and A. M. Sessler, "One-dimensional ordering of ultra-low-density ion beams in a storage ring", Phys. Rev. E 69 (2004) 066504.
• M. Kano, S. Masuda, A. Ogata, K. Okabe and H. Okamoto, "Ultra-low emittance beam generator using Coulomb crystals", J. Phys. Soc. Jpn. 73 (2004) pp. 760 - 761.

2003

• K. Matsukado, T. Esirkepov, K. Kinoshita, H. Daido, T. Utsumi, Z. Li, A. Fukumi, Y. Hayashi, S. Orimo, M. Nishiuchi, S. V. Bulanov, T. Tajima, A. Noda, Y. Iwashita, T. Shirai, T. Takeuchi, S. Nakamura, A. Yamazaki, M. Ikegami, T. Mihara, A. Morita, M. Uesaka, K. Yoshii, T. Watanabe, T. Hosokai, A. Zhidkov, A. Ogata, Y. Wada, and T. Kubota, "Energetic Protons from a Few Micron Metallic Foil Evaporated by Intense Laser Pulse", Phys. Rev. Lett. 91 (2003) 215001.
• A. Sanpei, Y. Kiwamoto, K. Ito, Y. Soga, "Formation of a vortex crystal cell assisted by a background vorticity distribution", Phys. Rev. E 68 (2003) 016404.
• T. Kubota, Y. Wada, and A. Ogata, "Visible Spectroscopy in T3 Laser Interaction with Thin Foil Targets", Jpn. J. Appl. Phys. 42 (2003) L1512.
• 和田 芳夫, 小方 厚, 久保田 哲生, "T3 レーザーと薄膜の相互作用による粒子生成", レーザー研究 31 (2003) 742．
• A. V. Fedotov, I. Hofmann, R. L. Gluckstern, and H. Okamoto, "Parametric collective resonances and space-charge limit in high-intensity rings", Phys. Rev. STAB 6 (2003) 094201.
• N. Saito and A. Ogata, "Plasmon linac: A laser wake-field accelarator based on a solid-state plasma", Phys. Plasmas, 10 (2003) pp. 3358 - 3362.
• K. Okabe and H. Okamoto, "Emittance Limitation in Cooled Hadron Beams", Jpn. J. Appl. Phys. 42 (2003) pp. 4584 - 4592.
• H. Okamoto, Y. Yuri and K. Okabe, "Oscillating Coulomb chain in a storage ring", Phys. Rev. E 67 (2003) 046501.

2002

• H. Okamoto, Y. Yuri and K. Okabe, "Some remarks on beam crystallization", Ion Beam Cooling -Toward the crystalline beam--, World Scientific Publishing Co., Singapore. (2002) pp. 160 - 175.
• N. Saito and A. Ogata, "Plasmon Linac", J. Plasma Fusion Res. 78 (2002) pp. 613 - 614.
• A. Ogata and H. Okamoto, "Extremely low-emittance low-current RFQ with ion trap injector", Quantum Aspects of Beam Physics , World Scientific Publishing Co., Singapore. (2002) pp.269 - 278.
• H. Okamoto, Y. Wada and R. Takai, "Radio-frequency quadrupole trap as a tool for experimental beam physics", Nucl. Instrum. Meth. A485 (2002) pp. 244 - 254.
• H. Okamoto, "Single-particle orbit equation in crystalline beams", Phys. Plasmas, 9 (2002) pp. 322 - 329.
• H. Okamoto and Y. Yokoya, "Parametric resonances in intense one-dimensional beams propagating through a periodic focusing channel", Nucl. Instrum. Meth. A482 (2002) pp. 51 - 64.
• H. Okamoto and S. Machida, "Particle beam resonances driven by dispersion and space charge", Nucl. Instrum. Meth. A482 (2002) pp. 65 - 78.
• Y. Yuri and H. Okamoto, "Effect of a Longitudinal Radio-Frequency Field on Crystalline Beams", J. Phys. Soc. Jpn. 71 (2002) pp. 1003 - 1004.

2001

• J. S. T. Ng, P. Chen, H. Baldis, P. Bolton, D. Cline, W. Craddock, C. Crawford, F. J. Decker, C. Field, Y. Fukui, V. Kumar, R. Iverson, F. King, R. E. Kirby, K. Nakajima, R. Noble, A. Ogata, P. Raimondi, D. Walz and A. W. Weidemann, "Observation Of Plasma Focusing of a 28.5GeV Positron Beam", Phys. Rev. Lett. 87 (2001) 244801.
• A. Sanpei, Y. Kiwamoto, K. Ito, "Generation of Vorticity Hole Surrounding a Point Vortex", J. Phys. Soc. Jpn. 70 (2001) pp. 2813 -2816.
• K. Ito, A. Ogata, H. Okamoto, "Nano-beam production by RFQ with ion-trap injector", International Journal of Applied Electromagnetics and Mechanics 14 (2001) pp. 283 - 287.
• K. Ito, Y. Kiwamoto and A. Sanpei, "Field Analysis of Two-Dimensional Dynamics of Nonneutral Plasma with Imaging Diagnostics and Examination of Sector-Probing", Jpn. J. Appl. Phys. 40 (2001) pp. 2558 - 2565.
• K. Ito, Y. Kiwamoto, A. Sanpei, "Determination of Stream Function of 2D Vortex in Nonneutral Plasma and Testing Sector Probe Signals", J. Plasma Fusion Research, SERIES 4 (2001), (11th International Toki Conference, Ceratopia Toki Conference Hall, Toki City, Japan, December 5 - 8/2000, P II-52).
• A. Sanpei, Y. Kiwamoto, K. Ito, "Vorticity Hole Surrounding a Point Vortex", J. Plasma Fusion Research, SERIES 4 (2001), (11th International Toki Conference, Ceratopia Toki Conference Hall, Toki City, Japan, December 5 - 8/2000, P II-51).
• Y. Kiwamoto, K. Ito, A. Sanpei, "Controlled Experiment of Two-Dimensional Vortex Dynamics", J. Plasma Fusion Research, SERIES 4 (2001), (Invited Talk at the 11th International Toki Conference, Ceratopia Toki Conference Hall, Toki City, Japan, December 5 - 8/2000, IX-2).
• Y. Kiwamoto, K. Ito, A. Sanpei and A. Mohri, "Two-dimensional Vortex Dynamics in a Potential-Confined Electron Plasma", Transactions of Fusion Technology Vol. 39 (2001) pp.119-126, (Invited Talk at the 3rd International Conference on Open Magnetic Systems for Plasma Confinement, Tsukuba Japan, July 3-8 / 2000).

2024

• K. Muroo, K. Ito, and H. Okamoto, “An ultimate single-ion source using using a Coulomb crystal in a Paul trap”, Proc. 15th International Particle Accelerator Conf. (2024)

2023

• Y. Yuri, N. Miyawaki, K. Hosaka, S. Hosoya, Y. Ishii, H. Kashiwagi, H. Shimada, R. Yamagata, T. Sato, Y. Saito, S. Onoda, K. Narumi, K. Muroo, K. Ito, and H. Okamoto, “Ion dynamics study in an ultrahigh-precision single-ion implanter”, Proc. 20th Meeting of Particle Accelerator Society of Japan, (August 29 – September 1, 2023), WEP03, pp. 470 – 474.

2022

• K. Kojima, H. Okamoto, and K. Moriya, “Construction of a multi-particle simulation model for the basic designs of high-intensity linear ion accelerators”, Proc. 19th Meeting of Particle Accelerator Society of Japan, (October 18–21, 2022), TUP059, pp. 486 – 490.
• N. Miyawaki, Y. Ishii, Y. Yuri, K. Narumi, K. Muroo, K. Ito, and H. Okamoto, “Study of the selective ion extraction from a linear Paul trap ion source”, Proc. 19th Meeting of Particle Accelerator Society of Japan, (October 18–21, 2022), WEOA06, pp. 61 – 64.

2019

• M. Aoki, K. Ito, and H. Okamoto, “Preliminary beam-dynamics experiment on the excitation of nonlinear resonances using a modified Paul ion trap”, Proc. 16th Meeting of Particle Accelerator Society of Japan, (July 31–August 3, 2019), THPI010, pp. 738 – 741.
• K. Ito, T. Kurauchi, H. Higaki, and H. Okamoto, “Direct measurement of the tunes of low-order coherent oscillation modes in a strong focusing lattice”, Proc. 16th Meeting of Particle Accelerator Society of Japan, (July 31–August 3, 2019), WEPI010, pp. 441 – 444.
• H. Okamoto, Y. Tokashiki, and K. Kojima, “Stability tune diagram of a high-intensity hadron ring”, Proc. 10th International Particle Accelerator Conf. (2019) pp. 3141 – 3144.
• H. Okamoto, “Hamiltonian formalism of intense beams in drift-tube linear accelerators”, Proc. 10th International Particle Accelerator Conf. (2019) pp. 3145 – 3147.

2018

• M. Kuriki, H. Hayano, Y. Seimiya, N. Yamamoto, X. Jin, T. Konomi, K. Sakaue, S. Kashiwagi, P, Piot, and J. Power, “Emittance Exchange program at KEK-STF”, AFAD2017.
• M. Kuriki, “ENERGY SPREAD COMPENSATION IN ARBITRARY FORMAT MULTI-BUNCH ACCELERATION WITH STANDING WAVE AND TRAVELING WAVE ACCELERATORS”, 9th International Particle Accelerator Conference IPAC2018, Vancouver, BC, Canada JACoW Publishing, ISBN: 978-3-95450-184-7 doi:10.18429/JACoW-IPAC2018-MOPMF076.
• Hisayasu Nagoshi, Masao Kuriki, Tohru Takahashi, Kentaro Negishi, Tsunehiko Omori, Masanori Satoh, Yuji Seimiya, Junji Urakawa, Yoske Sumitomo, Shigeru Kashiwagi, “A DESIGN STUDY OF THE ELECTRON-DRIVEN ILC POSITRON SOURCE INCLUDING BEAM LOADING EFFECT”, 9th International Particle Accelerator Conference IPAC2018, Vancouver, BC, Canada JACoW Publishing, ISBN: 978-3-95450-184-7 doi:10.18429/JACoW-IPAC2018-MOPMF077.
• L. Guo, M. Kuriki, H. Iijima, K. Uchida, “NEA SURFACE ACTIVATION OF GaAs PHOTOCATHODE WITH CO2”, 9th International Particle Accelerator Conference IPAC2018, Vancouver, BC, Canada JACoW Publishing, ISBN: 978-3-95450-184-7 THPMK11.
• Masao Kuriki, John Power, Hitoshi Hayano, Xiuguang Jin, Taro Konomi, Yuji Seimiya, Naoto Yamamoto, Philippe Piot, Shigeru Kashiwagi, Kazuyuki Sakaue, Masakazu Washio, “HIGH ASPECT RATIO BEAM GENERATION WITH THE PHASE-SPACE ROTATION TECHNIQUE FOR LINEAR COLLIDERS”, Prof. of Linac2018, THPO005,Friendship Hotel, Beijing, China, 16-21, Sept. 2018.
• Masao Kuriki, Hisayasu Nagoshi, Tohru Tahakashi, Kentaro Negishi, Toshiyuki Okugi, Tsunehiko Omor, Masashi Satoh, Yuji Seimiya, Junji Urakawa, Kaoru Yokoya, Yoske Sumitomo, Shigeru Kashiwagi, “THE EFFECT OF ENERGY FLUCTUATION ON THE MULTI-BUNCH ACCELERATION IN E-DRIVEN ILC POSITRON SOURCE”, Prof. of Linac2018, THPO127,Friendship Hotel, Beijing, China, 16-21, Sept. 2018.

2017

• M. KURIKI, G. Lei, A. Yokota, M. Urano, Y. Seimiya, T. Konomi, K. Negishi, M. Katoh, “A Study for Robustness of CsK2Sb Cathode”, Asian Forum of Accelerator and Detecotr (AFAD2017), 16-17 January (2017), Lanzhou, China.
• M. KURIKI , G. Lei, A. Yokota, M. Urano, Y. Seimiya, T. Konomi, K. Negishi, M. Katoh, “A Study for Robustness of CsK2Sb Cathode”, IX International workshop on Advanced Generation of THz and Compton X-rays (AGTaX) using compact electron accelerator, March 6-7(2017) Inter-University Accelerator Center, New Delhi, India.
• Masao Kuriki, Lei Guo, Masahiro Urano, Atsuki Yokota, Kentaro Negishi, Yuji Seimiya, “A LIFETIME STUDY OF CsK2Sb MULTI-ALKALI CATHODE”, IPAC2017, Copenhagen, TUPAB050.
• Masao Kuriki, Lei Guo, Masahiro Urano, Atsuki Yokota, Kentaro Negishi, Yuji Seimiya, “SUBSTRATE DEPENDENCE OF CSK2SB CATHODE PERFORMANCE”, IPAC2017, Copenhagen, TUPAB051.

2016

• Masao KURIKI, “Quasi-Quantum model of electron emission from NEA GaAs”, AFAD2016.
• T. Obina, M. Adachi, S. Adachi, T. Akagi, M. Akemoto, D.A. Arakawa, S. Araki, S. Asaoka, M. Egi, K. Enami, K. Endo, S. Fukuda, T. Furuya, K. Haga, K. Hara, K. Harada, T. Honda, Y. Honda, H. Honma, T. Honma, K. Hosoyama, K. Hozumi, A. Ishii, X.J. Jin, E. Kako, Y. Kamiya, H. Katagiri, R. Kato, H. Kawata, Y. Kobayashi, Y. Kojima, Y. Kondo, T. Konomi, A. Kosuge, T. Kume, T. Matsumoto, H. Matsumura, H. Matsushita, S. Michizono, T. Miura, T. Miyajima, H. Miyauchi, S. Nagahashi, H. Nakai, H. Nakajima, N. Nakamura, K. Nakanishi, K. Nakao, K.N. Nigorikawa, T. Nogami, S. Noguchi, S. Nozawa, T. Ozaki, F. Qiu, H. Sagehashi, H. Sakai, S. Sakanaka, S. Sasaki, K. Satoh, Y. Seimiya, T. Shidara, M. Shimada, K. Shinoe, T. Shioya, T. Shishido, M. Tadano, T. Tahara, T. Takahashi, R. Takai, H. Takaki, T. Takenaka, O. Tanaka, Y. Tanimoto, N. Terunuma, M. Tobiyama, K. Tsuchiya, T. Uchiyama, A. Ueda, K. Umemori, J. Urakawa, K. Watanabe, M. Yamamoto, N. Yamamoto, Y. Yamamoto, Y. Yano, M. Yoshida, R. Hajima, M. Mori, R. Nagai, N. Nishimori, M. Sawamura, T. Shizuma,M. Kuriki, “Recent Developments and Operational Status of the Compact ERL at KEK”, Proc. of IPAC2016, TUPOW036, Busan, Korea, 8-13, May 2016(2016).
• M. Kuriki, K. Negishi, H. Hayano, R. Kato, K. Ohmi, M. Satoh, Y. Seimiya, J. Urakawa,S. Kashiwagi, “Six-dimensional Phase-space Rotation and its Applications”, Proc. of IPAC2016, TUPOW006, Busan, Korea, 8-13, May 2016(2016).
• M. Urano, M. Kuriki, K. Negishi, T. Konomi, Y. Seimiya, N. Yamamoto, “A Study of CsK2Sb Multi-alkali Photocathode by Ultraviolet Photoelectron Spectroscopy at UVSOR”, Proc. of IPAC2016, THPOW005, Busan, Korea, 8-13, May 2016(2016).
• A. Yokota, R. Kaku, M. Kuriki, K. Negishi, M. Urano, “A Study of Operational Lifetime of CsK2Sb Photo-cathode”, Proc. of IPAC2016, THPOW006, Busan, Korea, 8-13, May 2016(2016).
• M. Kuriki , T. Kakita, T. Takahashi, K. Negishi, T. Okugi, T. Omori, M. Satoh, Y. Seimiya, J. Urakawa, K. Yokoya, “Electron Driven ILC Positron Source with a Low Gradient Capture Linac”, Proc. of LINAC2016,TUPRC008, East Lansing,MI, US, 25-29 Septermber(2016).
• M. Kuriki, T. Konomi, Y. Seimiya, L. Guo, M.Urano, A. Yokota, Kentaro Negishi, “UPS Study for CsK2Sb Photocathode”, Proc. of LINAC2016,TUPRC022, East Lansing,MI, US, 25-29 Septermber(2016).
• M. Kuriki, Y. Seimiya, L. Guo, K. Moriya, M. Urano, A. Yokota, “Lifetime Study of CsK2Sb Robust Photo-Cathode for a High Brightness Electron Source”, Proc. of LINAC2016,TUPLR013, East Lansing,MI, US, 25-29 Septermber(2016).

2015

• J. Wei, X.-P. Li, and H. Okamoto, “Crystalline beam studies with Andy Sessler”, Proc. International Workshop on Beam Cooling and Related Topics (COOL 15) pp. 155 – 164 (2015), published in March 2017. ISBN 978-3-95450-174-8
• M.Kuriki, Y. Seimiya, J. Urakawa, K. Ohmi, S. Chen, T. Kato, S. Kashiwagi, “FELEnhancementbyMicrobunchStructureMadewithPhaseSpaceRotation”, AFAD2015(Asian Forum for Accelerator and Detector, 26-27, January, 2015, Hsinchu, Taiwan.
• M. Kuriki, “Positron Source General Update”, ALCW2015 (Asian Regional Workshop for Linear Colliders), Tsukuba/Tokyo, 20-24 April 2015.
• M. Kuriki, Y. Seimiya, T. Takahashi (Hiroshima U.),T. Okugi, M. Sato, J. Urakawa, T. Omori (KEK), S. Kashiwagi (Tohoku U.), “Positron Capture Simulation for 300Hz Electron Driven Scheme”, ALCW2015 (Asian Regional Workshop for Linear Colliders), Tsukuba/Tokyo, 20-24 April 2015.
• N. Higashi, M. Kuriki, “The Development of Cavity Frequency Tracking Type RF Control System for SRF­TEM”, IPAC15, May 3-8, Richmond, VA, US, 2015.
• Y. Seimiya y, M. Kuriki, T. Takahashi, M. Urano, HU/AdSM, Higashi-Hiroshima T. Okugi, T. Omori, M. Satoh, J. Urakawa, KEK, Tsukuba, S. Kashiwagi, Tohoku U., Sendai, “AN OPTIMIZATION OF ILC POSITRON SOURCE FOR ELECTRON-DRIVEN SCHEME”, IPAC15, WEPWA017, May 3-8, Richmond, VA, US, 2015.
• Y. Seimiya , M. Kuriki, A. Yokota, R. Kaku, HU/AdSM, Higashi-Hiroshima T. Konomi, Inst. Molecular Sci., Aichi, M. Yamamoto, T. Miyajima, KEK, Tsukuba, “CSKSB PHOTOCATHODE R&D WITH HIGH QUANTUM EFFICIENCY AND LONG LIFETIME”, IPAC15, WEPWA018, May 3-8, Richmond, VA, US, 2015.
• M. Kuriki, Y. Seimiya, K. Uchida, “GaAs Photocathode Activation with CsTe Thin Film”, IPAC15, TUPWA062, May 3-8, Richmond, VA, US, 2015.
• M. Kuriki, Yuji Seimiya, R. Kato, “FEL Enhancement by Microbuch Structure Made with Phase-Space Rotation”, IPAC15, TUPWA063, May 3-8, Richmond, VA, US, 2015.
• Masao KURIKI, “E-driven Positron Source Overview”, LCWS2015.
• Masao KURIKI, “E-driven Positron Source Capture Simuation”, LCWS2015.
• Masao KURIKI, “ILC Positron Source Status”, LCWS2015.
• Masao KURIKI, “Change Request for BDS CSF to be compatible to accommodate both Undulator and E-driven Positron Source”, LCWS2015.
• Masao KURIKI, “Source WG summary”, LCWS2015.

2014

• A. Noda, M. Nakao, H. Okamoto, K. Osaki, Y. Yuri, H. Souda, H. Tonguu, K. Jimbo, M. Greiser, Z. He, and A. Smirnov, “Ultralow emittance beam production based on Doppler laser cooling and coupling resonance”, Proc. 5th International Particle Accelerator Conf. (2014) pp. 28 – 33.
• D. Kelliher, S. Machida, C. Prior, S. Sheehy, K. Fukushima, K. Ito, K. Moriya, H. Okamoto, and T. Okano, “Study of resonance crossing in non-scaling FFAGs using the S-POD linear Paul trap”, Proc. 5th International Particle Accelerator Conf. (2014) pp. 1571 – 1573.
• M. Kuriki, Y. Seimiya, K. Uchida, S. Kashiwagi, “GaAs cathode activation with CsTe thin film”, Photocathode Physics for Photoinjectors WS, Berkley, CA, US, 2014.

2013

• Z. He, J. Wei, K. Osaki, H. Okamoto, A. Noda, M. Nakao, H. Souda, Y. Yuri, and K. Jimbo, “Parameter optimization for multi-dimensional laser cooling of an ion beam in the storage ring S-LSR”, Proc. 2013 Particle Accelerator Conf. (2013) pp. 1298 – 1300.
• A. Noda, M. Nakao, H. Souda, H. Tongu, H. Okamoto, K. Osaki, Y. Yuri, K. Jimbo, and M. Grieser, “Latest results of experimental approach to ultra-cold beam at S-LSR”, Proc. International Workshop on Beam Cooling and Related Topics (COOL 13) pp. 157 – 161 (2013).
• Y. Yuri, K. Osaki, H. Okamoto, Z. He, H. Souda, A. Noda, M. Nakao, H. Tongu, and K. Jimbo, “Simulation study on transverse laser cooling and crystallization of heavy-ion beams at the cooler storage ring S-LSR”, Proc. International Workshop on Beam Cooling and Related Topics (COOL 13) pp. 162 – 165 (2013).
• S. L. Sheehy, D. Kelliher, S. Machida, C. Prior, K. Fukushima, K. Ito, K. Moriya, T. Okano, and H. Okamoto, “Experimental studies of resonance crossing in linear non-scaling FFAGs with the S-POD plasma trap”, Proc. 4th International Particle Accelerator Conf. (2013) pp. 2675 – 2677.
• H. Higaki, Y.Enomoto, N.Kuroda, K.Michishio, D.J.Murtagh, S.Ulmer, S.Van Gorp, C.H.Kim, Y.Nagata, Y.Kanai, H.A.Torii, M.Corradini, M. Leali, E. Lodi-Rizzini, V. Mascagna, L. Venturelli, N. Zurlo, K. Fujii, M. Otsuka, K. Tanaka, H. Imao, Y. Nagashima, Y. Matsuda, B. Juhasz, A. Mohri and Y. Yamazaki, “ Towards the production of anti-hydrogen beams ”, AIP Conference Proceedings #1521 (2013) 134-143 (NON-NEUTRAL PLASMA PHYSICS VIII : 10th International Workshop on Non-Neutral Plasmas edited by X. Sarasola, L. Schweikhard, and T. S. Pedersen, Greifswald, Germany, August 27-30, 2012).

2012

• A. Noda, M. Nakao, H. Souda, H. Tongu, K. Jimbo, H. Okamoto, K. Osaki, Y. Yuri, I. N. Meshkov, A. V. Smirnov, M. Grieser, K. Noda, T. Shirai, and Z. He, “Approach to the low temperature state oriented for crystalline beam”, Proc. XXIII Russian Particle Accelerator Conf. (RuPAC2012), (Saint-Petersburg, Russia, September 2012) pp. 48 ? 52.
• A. Noda, M. Nakao, H. Souda, H. Tongu, K. Ito, H. Okamoto, K. Osaki, Y. Yuri, K. Jimbo, M. Grieser, and Z. He, “Challenge for more efficient transverse laser cooling for beam crystallization”, Proc. 3rd International Particle Accelerator Conf. (2012) pp. 394 ? 396.
• H. Souda, M. Nakao, A. Noda, H. Tongu, K. Ito, H. Okamoto, Y. Yuri, K. Jimbo, M. Grieser, Z. He, “Observation of 2-component bunched beam signal with laser cooling”, Proc. 3rd International Particle Accelerator Conf. (2012) pp. 397 ? 399

2011

• A. Noda, M. Nakao, H. Souda, H. Tongu, K. Jimbo, T. Fujimoto, S. Iwata, S. Shibuya, K. Noda, T. Shirai, H. Okamoto, I. N. Meshkov, A. V. Smirnov, E. Syresin, and M. Grieser, “Recent status of beam cooling at S-LSR”, Proc. International Workshop on Beam Cooling and Related Topics (COOL 11), (2011) pp. 19 ? 24.
• A. Noda, M. Nakao, H. Souda, H. Tongu, T. Fujimoto, S. Iwata, S. Shibuya, K. Ito, H. Okamoto, K. Jimbo, M. Grieser, K. Noda, T. Shirai, “Recent status of beam cooling and related research at S-LSR”, Proc. 2nd International Particle Accelerator Conf. (2011) pp. 3436 ? 3438.

2010

• H. Sugimoto, K. Ito, H. Okamoto, and S. M. Lund, “Simulation study on coherent resonant instability of non-neutral plasmas confined in a linear Paul trap”, Proc. 1st International Particle Accelerator Conf. (2010) pp. 4668 − 4670.
• N. Kuroda, Y. Enomoto, H. Higaki, M. Hori, H. Imao, Y. Kanai, C.H. Kim, K. Kira, Y. Matsuda, K. Michishio, A. Mohri, Y. Nagata, H. Saito, M. Shibata, H.A. Torii, and Y. Yamazaki, " DEVELOPMENT OF MUSASHI, A MONO-ENERGETIC ULTRA-SLOW ANTIPROTON BEAM SOURCE ", Proc. 1st International Particle Accelerator Conf. (2010) pp. 4188 − 4190.
• K. Ito, K. Izawa, H. Higaki, and H. Okamoto, “Coulomb crystal extraction from an ion trap for application to nano-beam source”, Proc. 1st International Particle Accelerator Conf. (2010) pp. 3622 − 3624.
• P. Yu, Z. He, J. Wei, A. M. Sessler, H. Okamoto, and Y. Yuri, “Intra-beam scattering at low temperature range”, Proc. 1st International Particle Accelerator Conf. (2010) pp. 1943 − 1945.
• H. Okamoto, S. Ohtsubo, M. Fujioka, K. Ito, H. Sugimoto, H. Higaki, S. M. Lund, “S-POD experiments of space-charge-dominated beam resonances”, Proc. 1st International Particle Accelerator Conf. (2010) pp. 1339 − 1341.
• H. Higaki, S. Fujimoto, K. Fukata, K. Ito, M. Kuriki, H. Okamoto and J. Aoki, “Mismatch induced oscillations of space charge dominated beams in a uniform focusing channel”, Proc. 1st International Particle Accelerator Conf. (2010) pp. 1336 − 1338.
• H. Higaki, N. Kuroda, H. Imao, Y. Nagata, Y. Enomoto, K. Michishio, K. Kira, C. Kim, H. Okamoto, M. Hori, Y. Kanai, A. Mohri, H. A. Torii, Y. Matsuda, and Y. Yamazaki, “A tank circuit monitoring a large number of antiprotons in MUSASHI”, Proc. 1st International Particle Accelerator Conf. (2010) pp. 948 − 950.
• H. Souda, M. Nakao, T. Hiromasa, H. Tongu, A. Noda, H. Okamoto, A. V. Smirnov, K. Jimbo, M. Grieser, and T. Shirai, “Transverse laser cooling by synchro-betatron coupling”, Proc. 1st International Particle Accelerator Conf. (2010) pp. 861 − 863.
• M. Nakao, T. Hiromasa, H. Souda, H. Tongu, A. Noda, K. Jimbo, T. Shirai, M. Grieser, H. Okamoto, and A. V. Smirnov, “Optical measurement of transverse laser cooling with synchro-betatron coupling”, Proc. 1st International Particle Accelerator Conf. (2010) pp. 858 − 860.

2008

• Y. Yuri and H. Okamoto, “Heating rate of highly space-charge-dominated ion beams in a storage ring”, Proc. 2008 European Particle Accelerator Conf. (2008) pp. 3080 - 3082.
• H. Higaki, K. Ito, K. Kira, and H. Okamoto, "Electrons Confined with an Axially Symmetric Magnetic Mirror Field", AIP Conference Proceedings 1037 (2008) pp. 106 - 114.

2007

• H. Okamoto, K. Kaneta, and A. M. Sessler, "Theoretical study of emitance transfer", Proc. Int. Workshop on Beam Cooling and Related Topics (COOL07) (2007) pp. 82 - 86.
• J. Wei, H. Okamoto, H. Sugimoto, Y. Yuri and A. M. Sessler, "High-energy colliding crystals --- a theoretical study", Proc. Int. Workshop on Beam Cooling and Related Topics (COOL07) (2007) pp. 91 - 95.
• A. Noda, M. Ikegami, S. Fujimoto, T. Shirai, H. Souda, M. Tanabe, H. Tonguu, H. Okamoto, K. Noda, I. Meshkov, and A. Smirnov, "Experimental strategy for realization of 3D beam ordering with use of tapered cooling at S-LSR", Proc. 39th ICFA Advanced Beam Dynamics Workshop on High Intensity High Brightness Hadron Beams (HB2006) (2007) pp. 231 - 235.

2006

• J. Wei, H. Okamoto, S. Ochi, Y. Yuri, and A. M. Sessler, "Crystalline beams at high energies", Proc. 2006 European Particle Accelerator Conf. (2006) pp. 2841 - 2843.

2005

• X.-P. Li, H. Enokizono, H. Okamoto, Y. Yuri, A. M. Sessler, and J. Wei, "Phonon modes and the maintenance condition of a crystalline beam", Proc. 2005 Particle Accelerator Conf. (2005) pp. 4111 - 4113.

2004

• H. Okamoto, "Plasma traps for beam dynamics studies", Bull. Am. Phys. Soc. (May, 2004) p. 69.
• M. Ikegami, H. Okamoto, M. Tanabe, A. Noda, T. Shirai, K. Noda and M. Grieser, "Dispersion-free storage ring", Proc. 1st Annual Meeting of Particle Accelerator Society of Japan and the 29th Linear Accelerator Meeting in Japan (2004) pp. 102 - 104.
• T. Shirai, A. Noda, M. Ikegami, M. Tanabe, H. Tongu, H. Fadil, S. Fujimoto, T. Takeuchi, K. Noda, S. Shibuya, T. Fujimoto, H. Fujiwara, H. Okamoto, Y. Yuri, M. Grieser and E. Syresin, "INJECTION AND COOLING OF THE LOW ENERGY HEAVY ION BEAM IN THE RING", Proc. 1st Annual Meeting of Particle Accelerator Society of Japan and the 29th Linear Accelerator Meeting in Japan (2004) pp. 616 - 618.
• Y. Wada, T. Kubota and A. Ogata, "Ion Production Enhancement by Prepulse in Ultrashort-Pulse Laser Interaction with Foil Targets", Proc. 31th European Physical Society Conference on Plasma Physics in press.
• M. Adachi, E. Miura, S. Kato, N. Saito, K. Koyama, Y. Kawada, T. Nakamura and M. Tanimoto, "Electron Acceleration in a plasma produced from a dense gas jet irradiated by an intense laser pulse", Proc. 31th European Physical Society Conference on Plasma Physics in press.
• M. Ikegami, H. Fadil, A. Noda, T. Shirai, T. Takeuchi, M. Tanabe, H. Tongu, K. Noda, H. Ogawa, S. Shibuya, M. Grieser, and H. Okamoto, "Deflection element for S-LSR", Proc. 2004 European Particle Accelerator Conf. (2004) pp. 1357 - 1359.
• A. Noda, H. Fadil, S. Fujimoto, M. Ikegami, T. Shirai, M. Tanabe, H. Tongu, K. Noda, T. Takeuchi, M. Grieser, Meshkov, E. Syresin, H. Okamoto, Y. Yuri, "Beam cooling at S-LSR", Proc. 2004 European Particle Accelerator Conf. (2004) pp. 1360 - 1362.
• T. Shirai, H. Fadil, S. Fujimoto, M. Ikegami, A. Noda, H. Tongu, M. Tanabe, H. Okamoto, Y. Yuri, K. Noda, T. Takeuchi, S. Shibuya, T. Fujimoto, H. Fujiwara, E. Syresin, M. Grieser, "Lattice design and cooling simulation at S-LSR", Proc. 2004 European Particle Accelerator Conf. (2004) pp. 2119 - 2121.

2003

• Y. Wada, T. Kubota and A. Ogata, "ION AND NEUTRAL BEAM GENERATION BY 1TW, 50fs LASER IRRADIATION OF THIN FOILS", Proc. 2003 Particle Accelerator Conf. (2003) p3335.
• A. Fedotov, I. Hofmann, R. L. Gluckstern, and H. Okamoto, "Application of envelope instability to high-intensity rings", Proc. 2003 Particle Accelerator Conf. (2003) p2592.

2002

• A. Ogata and H. Okamoto, "Extremely Low-Emittance Low-Current RFQ with Ion-Trap Injector", QUANTUM ASPECTS OF BEAM PHYSICS, 18th Advanced ICFA Beam Dynamics Workshop, Capri, Italy, October 2000, edited by Pisin Chen, World Scientific, (2002) p269-278.
• T. Shirai, H. Fadil, Y. Iwashita, A. Morita, A. Noda, H. Tongu, A. Yamazaki, K. Okabe, H. Okamoto, Y. Yuri and M. Grieser, "Design of new compact cooler ring for crystalline beams", Proc. 2002 European Particle Accelerator Conf. (2002). pp. 623 - 625.
• N. Saito and A. Ogata, "Plasmon Linac", Proc. 2002 European Particle Accelerator Conf. (2002). pp. 995 - 997.
• H. Okamoto, S. Machida, and K. Yokoya, "Parametric resonances in intense hadron beams", Proc. 2002 European Particle Accelerator Conf. (2002). pp. 1383 - 1385.
• H. Okamoto, K. Ito, R. Takai, and Y. Wada, "A new experimental approach to space charge effects", Proc. 2002 European Particle Accelerator Conf. (2002). pp. 1386 - 1388.
• H. Okamoto, K. Okabe and Y. Yuri, "On the maintenance condition of a crystalline beam", Proc. 2002 European Particle Accelerator Conf. (2002). pp. 1389 - 1391.
• Y. Wada, T. Kubota and A. Ogata, "Neutral Beam Generation by Laser Irradiation of Thin Foils", Proc. 2002 European Particle Accelerator Conf. (2002). pp. 1747 - 1749.
• Y. Wada, T. Kubota and A. Ogata, "Neutral Beam Generation by Laser Irradiation of Thin Foils", Proc. Science of Superstrong Field Interactions - 7th Int. Symp. Grad. School for Advanced Studies. AIP Conf. Proc. 634, p. 329.

2001

• M. Adachi, S. Masuda, T. Katsouleas and A. Ogata, "PIC Simulation of Proton Acceleration in Plasma Waves Produced by Backward Raman Scattering", Proc. 13th Sympo. Accel. Sci. Tech., October (2001), pp. 289 - 291.
• T. Kubota, Y. Wada, K. Matsukado, K. Homma, F. Nishiyama, A. Seiki, Y. Tsuchimoto and A. Ogata, "Fast Proton Generation by Laser Irradiation of Thin Films", Proc. 13th Sympo. Accel. Sci. Tech., October (2001), pp. 295 - 297.
• N. Saito, Y. Wada and A. Ogata, "Plasmon Linac", Proc. 13th Sympo. Accel. Sci. Tech., October (2001), pp. 301 - 303.
• M. Kanou, R. Takai, Y. Wada, K. Ito and H. Okamoto, "Application of a Paul trap to the study of space-charge-dominated beams I: Theory", Proc. 13th Sympo. on Accel. Sci. and Tech. (2001) pp. 476 - 478.
• R. Takai, M. Kanou, Y. Wada, K. Ito, H. Okamoto and A. Ogata, "Application of a Paul trap to the study of space-charge-dominated beams II: Experiment", Proc. 13th Sympo. on Accel. Sci. and Tech. (2001) pp. 482 - 484.
• A. Ogata, "Plasma Accelerators Characterized by RF Linac Terminology", HEACC 2001, Tsukuba.