Hiromi Okamoto

Last Updated :2026/05/08

Affiliations, Positions
Graduate School of Advanced Science and Engineering, Professor
E-mail
okamotosci.hiroshima-u.ac.jp

Basic Information

Major Professional Backgrounds

  • 2020/04/01, Hiroshima University, Graduate School of Advanced Science and Engineering, Professor
  • 2005/04/01, 2020/03/31, Hiroshima University, Graduate School of Advanced Sciences of Matter, Professor
  • 1998/10/01, 2005/03/31, Hiroshima University, Graduate School of Advanced Sciences of Matter, Associate Professor
  • 1994/04/01, 1994/10/15, CERN, SL Division, Visiting Researcher
  • 1993/09/01, 1994/03/31, Lawrence Berkeley National Laboratory, Center for Beam Physics, Visiting Researcher
  • 1992/08/01, 1993/08/31, University of Maryland, Physics Department, Visiting Researcher
  • 1990/07/01, 1998/09/30, Kyoto University, Nuclear Science Research Facility, ICR, Assistant Professor
  • 1989/11/01, 1990/05/31, University of Maryland, Physics Department, Postdoctoral Fellow
  • 1989/04/01, 1990/06/30, Japan Society for the Promotion of Science, Special Postdoctoral Researcher

Educational Backgrounds

  • Kyoto University, Faculty of Science, Department of Physics, 1984/04, 1989/03
  • Kyoto University, Faculty of Science, Japan, 1980/04, 1984/03

Academic Degrees

  • Ph. D, Kyoto University
  • Master of Science, Kyoto University

Research Fields

  • Mathematical and physical sciences;Physics;Particle / Nuclear / Cosmic ray / Astro physics

Research Keywords

  • particle accelerator
  • storage ring
  • beam transport
  • high-density charged particle beam
  • non-neutral plasma
  • ion trap
  • laser cooling
  • Coulomb crystallization
  • nonlinear many-body dynamical system

Educational Activity

Course in Charge

  1. 2026, Liberal Arts Education Program1, 2Term, Introductory Seminar for First-Year Students
  2. 2026, Undergraduate Education, First Semester, Applied Electromagnetic Mechanics
  3. 2026, Undergraduate Education, First Semester, Special Study for Graduation A
  4. 2026, Undergraduate Education, Second Semester, Special Study for Graduation B
  5. 2026, Graduate Education (Master's Program) , First Semester, Seminar on Basic Sciences of Matter A
  6. 2026, Graduate Education (Master's Program) , Second Semester, Seminar on Basic Sciences of Matter B
  7. 2026, Graduate Education (Master's Program) , Year, Academic Presentation in Basic Sciences of Matter
  8. 2026, Graduate Education (Master's Program) , 1Term, Exercises in Basic Sciences of Matter A
  9. 2026, Graduate Education (Master's Program) , 2Term, Exercises in Basic Sciences of Matter A
  10. 2026, Graduate Education (Master's Program) , 3Term, Exercises in Basic Sciences of Matter B
  11. 2026, Graduate Education (Master's Program) , 4Term, Exercises in Basic Sciences of Matter B
  12. 2026, Graduate Education (Master's Program) , 2Term, Beam Physics
  13. 2026, Graduate Education (Master's Program) , Year, Advanced Study in Quantum Matter
  14. 2026, Graduate Education (Doctoral Program) , Year, Advanced Study in Quantum Matter

Research Activities

Academic Papers

  1. Experimental demonstration of ultrahigh-precision transport and acceleration of single ions, Physical Review Accelerators and Beams, 29(053401), 20260505
    Link to Paper Search Results by DOI
  2. Coherent transverse oscillation of Coulomb crystals in a linear Paul trap, J. Phys. Soc. Jpn., 95, 034301, 20260205
    Link to Paper Search Results by DOI
  3. Research and development study on nanobeam formation using laser-cooled ions for high-precision single-ion irradiation, Proc. 16th International Particle Accelerator Conference, 997-1000, 202506
    Link to Paper Search Results by DOI
  4. Investigating Ultralow-Emittance Nanobeam Formation Using a Coulomb Crystal, PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, 2025(2), 20250213
    Link to Paper Search Results by DOI
  5. Theoretical study of mismatch-induced halo formation from an intense hadron bunch in a uniform focusing channel, Progress of Theoretical and Experimental Physics, 20250217
    Link to Paper Search Results by DOI
  6. Investigating ultralow-emittance nanobeam formation using a Coulomb crystal, Progress of Theoretical and Experimental Physics, 023G01, 20250129
    Link to Paper Search Results by DOI
  7. Simulation study on a nano-beam irradiation system based on laser-cooled ions, Proc. 21st Meeting of Particle Accelerator Society of Japan, 2024
  8. Simple Design Criterion for High-Intensity Hadron Linacs, PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, 2024(7), 20240712
    Link to Paper Search Results by DOI
  9. Table-top ion-trap experiment on the stability of intense short bunches in linear hadron accelerators, PHYSICAL REVIEW ACCELERATORS AND BEAMS, 27(5), 20240521
    Link to Paper Search Results by DOI
  10. Simple design criterion for high-intensity hadron linacs, Progress of Theoretical and Experimental Physics, 073G01, 20240614
    Link to Paper Search Results by DOI
  11. Table-top ion-trap experiment on the stability of intense short bunches in linear hadron accelerators, Physical Review Accelerators and Beams, 27, 054201, 20240521
    Link to Paper Search Results by DOI
  12. An ultimate single-ion source using a Coulomb crystal in a Paul Trap, Proc. 15th International Particle Accelerator Conference, 606-609, 2024
  13. Ion dynamics study in an ultrahigh-precision single-ion implanter, Proc. 20th Meeting of Particle Accelerator Society of Japan, 470-474, 202309
  14. Observation and Modeling of External Rotating-Field-Driven Nonlinear Resonances in a Penning Trap, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 92(11), 20231115
    Link to Paper Search Results by DOI
  15. Calculation study of selective ion extraction from ion source with Paul-trap-type laser cooling device, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 542, 183-187, 202309
    Link to Paper Search Results by DOI
  16. Calculation study of selective ion extraction from ion source with Paul-trap-type laser cooling device, Nucl. Instrum. Meth. B, 542, 183-187, 20230713
  17. Simulation study of ultrahigh-precision single-ion extraction from a linear Paul trap, PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, 2023(6), 20230606
    Link to Paper Search Results by DOI
  18. 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, 486-490, 202301
  19. Study of the selective ion extraction from a linear Paul trap ion source, Proc. 19th Meeting of Particle Accelerator Society of Japan, 61-64, 202301
  20. Simulation study of ultrahigh-precision single-ion extraction from a linear Paul trap, Progress of Theoretical and Experimental Physics, 20230606
    Link to Paper Search Results by DOI
  21. Stability study of intense hadron bunches in linear accelerators using a Paul ion trap, PHYSICAL REVIEW ACCELERATORS AND BEAMS, 25(5), 20220505
    Link to Paper Search Results by DOI
  22. ★, Stability study of intense hadron bunches in linear accelerators using a Paul ion trap, Physical Review Accel. Beams, 25, 054201, 20220505
    Link to Paper Search Results by DOI
  23. Characterization of overlapping betatron resonances above the phase advance of 90 degrees per cell, PHYSICAL REVIEW ACCELERATORS AND BEAMS, 25(2), 20220228
    Link to Paper Search Results by DOI
  24. Characterization of overlapping betatron resonances above the phase advance of 90 degrees per cell, Phys. Rev. Accel. Beams, 25, 024201, 20220228
    Link to Paper Search Results by DOI
  25. Properties of non-neutral electron plasmas confined with a magnetic mirror field, PHYSICAL REVIEW E, 75(6), 200706
    Link to Paper Search Results by DOI
  26. Axial resonances of Ar+ ions observed in a linear Paul trap, HYPERFINE INTERACTIONS, 174(1-3), 77-82, 200701
    Link to Paper Search Results by DOI
  27. Density and potential profiles of non-neutral electron plasmas in a magnetic mirror field, PHYSICAL REVIEW E, 81(1), 201001
    Link to Paper Search Results by DOI
  28. Experimental study of coherent betatron resonances with a Paul trap, PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS, 13(4), 201004
    Link to Paper Search Results by DOI
  29. Indirect Transverse Laser Cooling of Ions in a Linear Paul Trap, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 79(8), 201008
    Link to Paper Search Results by DOI
  30. ★, Controlled Extraction of Ultracold Ions from a Linear Paul Trap for Nanobeam Production, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 79(12), 201012
    Link to Paper Search Results by DOI
  31. Dark-lifetime degradation of GaAs photo-cathode at higher temperature, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A, 637, S87-S90, 20110501
    Link to Paper Search Results by DOI
  32. Simple Measurement Systems for permanent Magnet Quadrupole Lense, Review of Sientific Instruments, 60(9), 2975, 19890401
  33. ★, Proposed experiments for the study of beam halo formation, Nucl. Intrum. Meth. A, 437, 178-187, 19990401
    Link to Paper Search Results by DOI
  34. Three-dimensional laser cooling method based on resonant linear coupling, Phys. Rev. E, 59, 3594-3604, 19990401
    Link to Paper Search Results by DOI
  35. ★, Necessary conditions for attaining a crystalline beam, Phys. Rev. Lett., 80(12), 2606-2609, 19980401
    Link to Paper Search Results by DOI
  36. Space-charge-dominated beams in synchrotrons, Phys. Rev. Lett., 80(23), 5133-5136, 19980401
    Link to Paper Search Results by DOI
  37. ★, Theory of tapered cooling, Phys. Rev. E, 58(3), 3817-3825, 19980401
    Link to Paper Search Results by DOI
  38. ★, Simulation study of halo formation in breathing round beams, Phys. Rev. E, 55(4), 4694-4705, 19970401
    Link to Paper Search Results by DOI
  39. Halo formation from mismatched axisymmetric beams in a periodic focusing channel, Jpn. J. Appl. Phys., 36, 7028-7034, 19970401
  40. Longitudinal beam emittance monitor for 433 MHz proton linac, Rev. Sci. Instrum, 67(9), 3085-3091, 19960401
  41. Laser cooling in a storage ring and crystalline beams, Genshikaku Kenkyu, 41(2), 1-10, 19960401
  42. Three-dimensional laser cooling by synchrobetatron coupling, Crystalline Beams and Related Issues, 173-183, 19960401
  43. The coupling impedance of periodic irises in a beam pipe, Particle Accelerators, 52, 179-200, 19960401
  44. Transverse stability of bunch trains, Physical Review E, 52(1), 1026-1038, 19950401
    Link to Paper Search Results by DOI
  45. Beam breakup in bunch trains, CERN Report, SL75, 1-24, 19940401
  46. ★, Transverse laser cooling induced through dispersion at an rf cavity, Phys. Rev. E, 50(6), 4982-4995, 19940401
    Link to Paper Search Results by DOI
  47. ★, Longitudinal and transverse impedance of an iris in a beam pipe, Phys. Rev. E, 50(2), 1501-1515, 19940401
    Link to Paper Search Results by DOI
  48. ★, Three-dimensional laser cooling of stored and circulating ion beams by means of a coupling cavity, Phys. Rev. Lett., 72(25), 3977-3980, 19940401
    Link to Paper Search Results by DOI
  49. Beam current monitor with a troidal coil for a pulsed proton beam, Bull. Inst. Chem. Res., Kyoto Univ., 72(1), 76-86, 19940401
  50. One-dimensional beam stability analysis based on the waterbag model, Nucl. Instrum. Meth. A, 332, 1-22, 19930401
  51. Analysis of the saturation of a high gain FEL, Physical Review E, 47(6), 4412-4429, 19930401
    Link to Paper Search Results by DOI
  52. Synchrobetatron-coupling effects in alternating-phase-focusing linacs, Physical Review E, 48(6), 4689-4698, 19930401
    Link to Paper Search Results by DOI
  53. Characteristics of the ion source and low energy beam transport of the proton linac at ICR, Bull. Inst. Chem. Res., Kyoto Univ., 71(1), 6-14, 19930401
  54. Study of beam profile monitor for the proton linac, Bull. Inst. Chem. Res., Kyoto Univ., 71(1), 15-20, 19930401
  55. Cold model test of a DTL with transition from 4p to 2p-mode acceleration, Bull. Inst. Chem. Res., Kyoto Univ., 71(1), 26-36, 19930401
  56. Commissioning of the 7MeV proton linac at ICR Kyoto University, Bull. Inst. Chem. Res., Kyoto Univ., 71(1), 57-61, 19930401
  57. Improvement of the proton accelerator system, Bull. Inst. Chem. Res., Kyoto Univ., 70(1), 37-44, 19920401
  58. High power dummy-load for rf system of the linac, Bull. Inst. Chem. Res., Kyoto Univ., 70(1), 45-54, 19920401
  59. Design study of a beam matching section for the ICR proton linac, Bull. Inst. Chem. Res., Kyoto Univ., 70(1), 89-98, 19920401
  60. Cold model test of a four vane RFQ for multi-purpose use linac, Bull. Inst. Chem. Res., Kyoto Univ., 70(1), 99-108, 19920401
  61. Coupled motion in alternating phase focused linacs, Bull. Inst. Chem. Res., Kyoto Univ., 69(1), 1-10, 19910401
  62. System of 7MeV proton linac, Bull. Inst. Chem. Res., Kyoto Univ., 68(2), 156-161, 19900401
  63. Effect of constant curvature vane tip on rf quadrupole beam dynamics, Bull. Inst. Chem. Res., Kyoto Univ., 68(2), 127-131, 19900401
  64. ★, Beam dynamics of alternating phase focused linacs, Nucl. Instrum. Meth. A, 284, 233-247, 19890401
    Link to Paper Search Results by DOI
  65. Rf characteristics of 433.3MHz proton RFQ linac, Bull. Inst. Chem. Res., Kyoto Univ., 66(1), 29-37, 19880401
  66. Design of 433.3MHz Alvarez drift tube linac and beam matching section, Bull. Inst. Chem. Res., Kyoto Univ., 66(1), 38-43, 19880401
  67. Design of 433.3MHz proton RFQ linac, Bull. Inst. Chem. Res., Kyoto Univ., 65(1), 35-45, 19870401
  68. Study of permanent magnet quadrupole lens, Bull. Inst. Chem. Res., Kyoto Univ., 64(1), 20-24, 19860401
  69. Extremely low-emittance low-current RFQ with ion trap injector, World Scientific, 269-278, 20030401
  70. Parametric resonances in intense hadron beams, Proc. 2004 European Particle Accelerator Conf., 1383-1385, 20020401
  71. A new experimental approach to space charge effects, Proc. 2004 European Particle Accelerator Conf., 1386-1388, 20020401
  72. On the maintenance condition of a crystalline beam, Proc. 2004 European Particle Accelerator Conf., 1389-1391, 20020401
  73. Design of new compact cooler ring for crystalline beams, Proc. 2004 European Particle Accelerator Conf., 623-625, 20020401
  74. Beam science facility with combination of ion and electron storage rings, Proc. 2004 European Particle Accelerator Conf., 563-565, 20000401
  75. Simulation study of three-dimensional laser cooling schemes for fast stored beams, Proc. 1998 European Particle Accelerator Conf., 1040-1042, 19980401
  76. The coupling-cavity scheme for three-dimensional laser cooling, Proc. 1997 Particle Accelerator Conf., 2, 1798-1800, 19970401
  77. Halo formation from axisymmteric breathing beams, Proc. 1997 Particle Accelerator Conf., 2, 1911-1913, 19970401
  78. Power model of biperiodic DAW cavity, Proc. 1996 Linear Accel. Conf., 857-859, 19960401
  79. Measurement of the beam distribution of 433 MHz proton linac in longitudinal phase space, Proc. of the 1996 Linear Accel. Conf., 237-239, 19960401
  80. Electron storage and stretcher ring, KSR, Proc. 1998 European Particle Accelerator Conf., 19960401
  81. Impedance of periodic irises in a beam pipe, Proc. 1997 Particle Accelerator Conf., 4, 3263-3265, 19950401
  82. Matching section to the RFQ using permanent magnet symmetric lens, Proc. 1995 Particle Accelerator Conf., 3, 1843-1845, 19950401
  83. A 100 MeV injector for the electron storage ring at Kyoto University, Proc. 1995 Particle Accelerator Conf., 2, 1079-1081, 19950401
  84. Electron storage ring KSR for light source with synchrotron radiation, Proc. 1995 Particle Accelerator Conf., 1, 278-280, 19950401
  85. Cold model test of biperiodic L-support Disk-And-Washer linac structure, Proc. 1995 Particle Accelerator Conf., 2, 1093-1095, 19950401
  86. Three-dimensional laser cooling, LBL Report, LBL-35899, 19940401
  87. Synchro-betatron resonance effects in alternating phase focusing, Proc. 1997 Particle Accelerator Conf., 221-223, 19930401
  88. Saturation of a high gain FEL, Proc. 1993 Particle Accelerator Conf., 1545-1547, 19930401
  89. Transverse impedance of an iris in a beam pipe, Proc. 1993 Particle Accelerator Conf., 3390-3392, 19930401
  90. One-year operation of the 7MeV proton linac, Proc. 1993 Particle Accelerator Conf., 1697-1699, 19930401
  91. Beam acceleration of the compact proton linac and the light ion RFQ linac at ICR Kyoto University, 192-195, 19930401
  92. Design study of compact proton synchrotron for biomedical use, Proc. 3rd European Part. Accel. Conf., 1663-1665, 19920401
  93. Performance of the RFQ and Alvarez linac at Kyoto University, Proc. 3rd European Part. Accel. Conf., 560-562, 19920401
  94. 7MeV proton linac, Proc. 1996 Linear Accel. Conf., 746-748, 19900401
  95. Development of linear accelerators at ICR Kyoto University, 155-157, 19900401
  96. 7MeV proton linac at ICR, The 2nd Int. Sympo. on Advanced Nucl. Ene. Res., 345-347, 19900401
  97. Simulation study of three-dimensional laser cooling method for fast stored ion beams, ICR Annual Report, 6, 54-55, 19980401
  98. Can beam halo be scraped ?, Beam Science and Technology, 2, 20-22, 19970401
  99. An emittance measurement system for the low energy beam transport of the ICR proton linac, Beam Science and Technology, 1, 21-24, 19960401
  100. Development of space-charge codes at ICR, Beam Science and Technology, 1, 25-30, 19960401
  101. Electron storage ring, KSR, Beam Science and Technology, 1, 37-40, 19960401
  102. Three-dimensional laser cooling of fast circulating beams, ICR Annual Report, 2, 56-57, 19950401
  103. Application of a Paul trap to the study of space-charge-dominated beams I: Theory, Proc. 8th Sympo. on Accel. Sci. and Tech., 20010401
  104. Application of a Paul trap to the study of space-charge-dominated beams II: Experiment, Proc. 8th Sympo. on Accel. Sci. and Tech., 20010401
  105. Improvement of bridge coupler for Disk-And-Washer structure, Proc. 8th Sympo. on Accel. Sci. and Tech., 176-178, 19970401
  106. A possible 3D laser cooling scheme in a storage ring, Proc. 11th Sympo. on Accel. Sci. and Tech., 481-483, 19970401
  107. Cold model measurement of biperiodic L-support DAW, Proc. 8th Sympo. on Accel. Sci. and Tech., 67-69, 19950401
  108. Present status of the accelerator development at the ICR Kyoto University, Proc. 10th Sympo. on Accel. Sci. and Tech., 185-187, 19950401
  109. Longitudinal emittance measurement for 433MHz proton linac, Proc. 10th Sympo. on Accel. Sci. and Tech., 248-250, 19950401
  110. Present status of the 7 MeV proton linac at ICR Kyoto University, Proc. 8th Sympo. on Accel. Sci. and Tech., 196-198, 19930401
  111. Performance of the ICR 433 MHz RFQ linac, Proc. 9th Sympo. on Accel. Sci. and Tech., 223-225, 19930401
  112. Stability of 1D waterbag-type beams, Proc. 8th Sympo. on Accel. Sci. and Tech., 392-394, 19910401
  113. Alternating phase focused structures, Proc. 8th Sympo. on Accel. Sci. and Tech., 401-403, 19910401
  114. Rf characteristics of 433.3MHz RFQ, Proc. 8th Sympo. on Accel. Sci. and Tech., 125-127, 19910401
  115. Present status of 7MeV proton linac at Kyoto University, Proc. 8th Sympo. on Accel. Sci. and Tech., 52-54, 19910401
  116. 7MeV proton linac at ICR, Proc. 8th Sympo. on Accel. Sci. and Tech., 38-40, 19890401
  117. Design parameters and rf properties of 433.3MHz proton RFQ linac at ICR, Proc. 8th Sympo. on Accel. Sci. and Tech., 111-113, 19870401
  118. Application of envelope instability to high-intensity rings, Proc. 2003 Particle Accelerator Conf., 2592-2594, 20030401
  119. Linacs and beam physics at ICR Kyoto University, 74-77, 19970401
  120. Pulsed neutron source based on accelerator-subcritical-assembly, Proc. 7th International Sympo. Advanced Nucl. Ene. Res., 462-465, 19970401
  121. Construction of an RFQ linac, Proc 4th China-Japan Joint Sympo. on Accel. for Nucl. Sci. ＆ their Applications, 64-66, 19870401
  122. Deflection element for S-LSR, Proc. 2004 European Particle Accelerator Conf., 1357-1359, 20040401
  123. Beam cooling at S-LSR, Proc. 2004 European Particle Accelerator Conf., 1360-1362, 20040401
  124. Lattice design and cooling simulation at S-LSR, Proc. 2004 European Particle Accelerator Conf., 2119-2121, 20040401
  125. Space-charge simulations and experiments at Hiroshima University, AIP Conf. Proc., 773, 142, 20050401
  126. Phonon modes and the maintenance condition of a crystalline beam, Proc. 2003 Particle Accelerator Conf., 4111, 20050401
  127. Frozen beams, (invited paper) Proc. 2005 Particle Accelerator Conf., 4, 20050401
  128. High-quality charged particle beams and plasma physics, J. Plasma Fusion Res., 82(4), 187-195, 20060401
  129. S-LSR: Cooler ring development at Kyoto University, AIP Conf. Proc., 821, 103-107, 20060401
  130. Laser cooling for 3D crystalline state at S-LSR, AIP Conf. Proc., 821, 491-500, 20060401
  131. Development of a compact plasma trap for experimental beam physics, Jpn. J. Appl. Phys., 45(6A), 5332, 20060401
  132. Nonlinear resonance effects in a linear Paul trap, J. Phys. Soc. Jpn., 76(1), 014802 (8 pages), 20070101
  133. Experimental strategy for realization of 3D beam ordering with use of tapered cooling at S-LSR, Proc. HB2006 (39th ICFA Advanced Beam Dynamics Workshop), 231-235, 20070401
  134. Coulomb Crystal Extraction from an Ion Trap for Application to Nano-Beam source, Proc. 1st International Particle Accelerator Conf., 3622-3624, 20100601
  135. S-POD experiments of space-charge-dominated beam resonances, Proc. 1st IPAC, 1339-1341, 20100601
  136. Mismatch Induced Oscillations of Space Charge Dominated Beams in a Uniform Focusing Channel, 1336-1338, 20100501
  137. Electrostatic Oscillations Observed in Non-Neutral Electron Plasmas Confined in a Magnetic Field Gradient, Plasma Fusion Res., 5(-), 029 (1-3), 20100701
  138. Intra-beam scattering at low temperature range, Proc. 1st IPAC, 1943-1945, 20100501
  139. Status and challenges in beam crystallization, Proc. COOL'09, 86-90, 20101201
  140. Optical measurement of transverse laser cooling with synchro-betatron coupling, Proc. 1st IPAC, 858-860, 20100501
  141. Transverse laser cooling by synchro-betatron coupling, Proc. 1st IPAC, 861-863, 20100501
  142. Coulomb coupling and heating of charged particle beams in the presence of dispersion, J. Plasma Fusion Res., 8, 950-954, 20091001
  143. Heating rate of highly space-charge-dominated ion beams in a storage ring, Proc. 2008 European Particle Accelerator Conf., 3080-3082, 20080101
  144. Tune depression of ion plasmas observed in a linear Paul trap, J. Plasma Fusion Res., 8, 959-962, 20091201
  145. A study of Lifetime of GaAs Photocathode for High Brightness Electron Source, Proc. 23rd Particle Accelerator Conference, MO6RFP069, 20090501
  146. A tandem linear Paul trap as an ion source, Journal of Physics, 163(1), 012102-1-4, 20090101
  147. Non-neutral plasma traps for accelerator-free experiments on space-charge-dominated beam dynamics, (invited paper) Proc. 2011 Particle Accelerator Conf., 46-50, 20110301
  148. Recent status of beam cooling and related research at S-LSR, Proc. 2nd International Particle Accelerator Conf., 3436-3438, 20110901
  149. Nano-beam production by RFQ with ion-trap injector, INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS, 14(1-4), 283-287, 2001
    Link to Paper Search Results by DOI
  150. Single-particle orbit equation in crystalline beams, PHYSICS OF PLASMAS, 9(1), 322-329, 200201
    Link to Paper Search Results by DOI
  151. Effect of a longitudinal radio-frequency field on crystalline beams, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 71(3), 1003-1004, 200203
    Link to Paper Search Results by DOI
  152. ★, Parametric resonances in intense one-dimensional beams propagating through a periodic focusing channel, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A, 482(1-2), 51-64, 20020411
    Link to Paper Search Results by DOI
  153. Particle beam resonances driven by dispersion and space charge, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A, 482(1-2), 65-78, 20020411
    Link to Paper Search Results by DOI
  154. Radio-frequency quadrupole trap as a tool for experimental beam physics, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A, 485(3), 244-254, 20020611
    Link to Paper Search Results by DOI
  155. Parametric collective resonances and space-charge limit in high-intensity rings, PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS, 6(9), 200309
    Link to Paper Search Results by DOI
  156. Oscillating Coulomb chain in a storage ring, PHYSICAL REVIEW E, 67(4), 200304
    Link to Paper Search Results by DOI
  157. Emittance limitation in cooled hadron beams, JAPANESE JOURNAL OF APPLIED PHYSICS, 42(7A), 4584-4592, 200307
    Link to Paper Search Results by DOI
  158. Ultra-low emittance beam generator using Coulomb crystals, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 73(3), 760-761, 200403
    Link to Paper Search Results by DOI
  159. ★, One-dimensional ordering of ultra-low-density ion beams in a storage ring, PHYSICAL REVIEW E, 69(6), 200406
    Link to Paper Search Results by DOI
  160. Theoretical aspects of beam crystallization, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A, 532(1-2), 32-39, 20041011
    Link to Paper Search Results by DOI
  161. S-LSR: test ring for beam crystal, its design and ordering simulation, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A, 532(1-2), 488-491, 20041011
    Link to Paper Search Results by DOI
  162. Design and fabrication of a linear Paul trap for the study of space-charge-dominated beams, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A, 532(1-2), 508-512, 20041011
    Link to Paper Search Results by DOI
  163. Generating ultralow-emittance ion beams in a storage ring, PHYSICAL REVIEW LETTERS, 93(20), 20041112
    Link to Paper Search Results by DOI
  164. Heavy ion storage ring without linear dispersion, PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS, 7(12), 200412
    Link to Paper Search Results by DOI
  165. Feasibility of beam crystallization in a cooler storage ring, PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS, 8(11), 200511
    Link to Paper Search Results by DOI
  166. Coulomb coupling constant for spatially confined single-species plasmas, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 74(7), 2099-2100, 200507
    Link to Paper Search Results by DOI
  167. Monoenergetic electron beam generation in a laser-driven plasma acceleration, LASER PHYSICS LETTERS, 3(2), 79-85, 200602
    Link to Paper Search Results by DOI
  168. Phonon spectrum and the maintenance condition of crystalline beams, PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS, 9(3), 200603
    Link to Paper Search Results by DOI
  169. Cascade acceleration of electrons by laser wakefield and direct laser field, JAPANESE JOURNAL OF APPLIED PHYSICS, 45(5A), 4214-4218, 200605
    Link to Paper Search Results by DOI
  170. ★, Crystalline beams in dispersion-free storage rings, PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS, 9(12), 200612
    Link to Paper Search Results by DOI
  171. Phase-space manipulation of charged-particle beams by means of coupling resonances, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 76(7), 200707
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  173. Three-dimensional laser cooling of ion beams using a Wien filter, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 77(7), 200807
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  181. Parameter optimization for Doppler laser cooling of a low-energy heavy ion beam at the storage ring S-LSR, PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, 201405
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  182. ★, Experimental simulation of beam propagation over long path lengths using radio-frequency and magnetic traps, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A, 733, 119-128, 20140101
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  183. Experimental verification of resonance instability bands in quadrupole doublet focusing channels, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A, 733, 18-24, 20140101
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  189. Beam crystallization. Are we there yet?, (invited paper) Proc. COOL'13, 152-156, 2013
  190. Plasma traps for space-charge studies: status and perspectives, (invited paper) Proc. 52nd ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams, 235-239, 2012
  191. Modeling of ultra-cold and crystalline ion beams, (invited paper) Proc. 10th International Computational Accelerator Physics Conference, 151-156, 2010
  192. Theoretical study of emittance transfer, (invited paper) Proc. COOL'07, 82-86, 2007
  193. High-energy colliding crystals -- a theoretical study, Proc. COOL'07, 91-95, 2007
  194. Ultralow emittance beam production based on Doppler laser cooling and coupling resonance, Proc. 5th International Particle Accelerator Conference, 2014
  195. Study of resonance crossing in non-scaling FFAGs using the S-POD linear Paul trap, Proc. 5th International Particle Accelerator Conference, 2014
  196. Parameter optimization for multi-dimensional laser cooling of an ion beam in the storage ring S-LSR, Proc. 2013 Particle Accelerator Conf., 2013
  197. Latest results of experimental approach to ultra-cold beam at S-LSR, Proc. International Workshop on Beam Cooling and Related Topics (COOL 13), 2013
  198. 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), 2013
  199. Experimental studies of resonance crossing in linear non-scaling FFAGs with the S-POD plasma trap, Proc. 4th International Particle Accelerator Conference, 2013
  200. Approach to the low temperature state oriented for crystalline beam, Proc. XXIII Russian Particle Accelerator Conf. (RuPAC2012), 2012
  201. Challenge for more efficient transverse laser cooling for beam crystallization, Proc. 3rd International Particle Accelerator Conference, 2012
  202. Observation of 2-component bunched beam signal with laser cooling, Proc. 3rd International Particle Accelerator Conference, 2012
  203. Recent status of beam cooling at S-LSR, Proc. International Workshop on Beam Cooling and Related Topics (COOL 11), 2011
  204. A tank circuit monitoring a large number of antiprotons in MUSASHI, Proc. 1st International Particle Accelerator Conference, 2010
  205. Simulation study on coherent resonant instability of non-neutral plasmas confined in a linear Paul trap, Proc. 1st International Particle Accelerator Conference, 2010
  206. Optical measurement system of laser-cooled Mg ion beam, Proc. 2009 Particle Accelerator Conference, 2009
  207. Recent approach to crystalline beam with laser cooling at ion storage ring, S-LSR, Proc. 2009 Particle Accelerator Conference, 2009
  208. Crystalline beams at high energies, Proc. 2006 European Particle Accelerator Conference, 2006
  209. Systematic experiments on the mismatch induced halo formation using non-neutral electron plasmas in a uniform magnetic field, Proc. 9th Meeting of Particle Accelerator Society of Japan, 427-429, 2012
  210. Controlled beam scraping oriented for efficient indirect transverse laser cooling, Proc. 9th Meeting of Particle Accelerator Society of Japan, 72-74, 2012
  211. Measurement of transverse laser cooling effect using scrapers, Proc. 9th Meeting of Particle Accelerator Society of Japan, 388-390, 2012
  212. Theoretical study on the stability of Coulomb crystallized beams in periodic focusing channels, Proc. 8th Meeting of Particle Accelerator Society of Japan, 1134-1137, 2011
  213. Beam current dependence of the equilibrium temperature with a laser cooling, Proc. 8th Meeting of Particle Accelerator Society of Japan, 1089-1091, 2011
  214. Present status of ion accumulation and cooler ring, S-LSR, Proc. 8th Meeting of Particle Accelerator Society of Japan, 261-263, 2011
  215. Tune optimization for resonant coupling at S-LSR, Proc. 6th Meeting of Particle Accelerator Society of Japan, 1132-1134, 2009
  216. Extraction of Coulomb crystals from a Paul-trap ion source for nano-beam generation, Proc. 6th Meeting of Particle Accelerator Society of Japan, 857-859, 2009
  217. Observation of collective resonance stopbands in Simulator for Particle Orbit Dynamics, Proc. 6th Meeting of Particle Accelerator Society of Japan, 121-123, 2009
  218. Optical measurement of the laser cooling experiment of the bunched beam at the S-LSR, Proc. 6th Meeting of Particle Accelerator Society of Japan, 1135-1137, 2009
  219. A study of lifetime degradation of GaAs photo-cathode by heating, Proc. 6th Meeting of Particle Accelerator Society of Japan, 894-896, 2009
  220. Experiments on the mismatch induced halo formation in pure electron plasmas, Proc. 6th Meeting of Particle Accelerator Society of Japan, 2009
  221. On the stability of high-energy crystalline beams, Proc. 5th Meeting of Particle Accelerator Society of Japan, 436-438, 2008
  222. Development of a beam imaging system for a solenoid trap, Proc. 5th Meeting of Particle Accelerator Society of Japan, 451-453, 2008
  223. Phase-space manipulation and conditioning for FEL, Proc. 5th Meeting of Particle Accelerator Society of Japan, 439-441, 2008
  224. Development of laser cooling system for ion trap designed for beam physics, Proc. 5th Meeting of Particle Accelerator Society of Japan, 445-447, 2008
  225. Status of photo-cathode test bench, Proc. 5th Meeting of Particle Accelerator Society of Japan, 969-971, 2008
  226. Experimental study of beam physics with ion plasmas confined in a linear Paul trap, Proc. 5th Meeting of Particle Accelerator Society of Japan, 442-444, 2008
  227. Development of an emittance measurement system for a high intensity electron beam emission from NEA-GaAs type photocathode, Proc. 5th Meeting of Particle Accelerator Society of Japan, 159-161, 2008
  228. Production of Coulomb crystal for nano ion beam, Proc. 5th Meeting of Particle Accelerator Society of Japan, 448-450, 2008
  229. Degradiation mechanism of NEA-GaAs photocathode surface analyzed by QE mapping data, Proc. 5th Meeting of Particle Accelerator Society of Japan, 960-962, 2008
  230. Electron cooling experiments at ion storage ring, S-LSR, Proc. 3rd Annual Meeting of Particle Accelerator Society of Japan, 112-114, 2006
  231. Working Group C Summary: computational challenges, new concepts, and new projects, Proc. HB2014, 448-452, 2014
  232. Beam Dynamics at Ion Storage Ring S-LSR, Proc. 2nd Meeting of Particle Accelerator Society of Japan, 742-744, 2005
  233. Injection and cooling of the low energy heavy ion beam in the ring, Proc. 1st Meeting of Particle Accelerator Society of Japan, 616-618, 2004
  234. Dispersion-free storage ring, Proc. 1st Meeting of Particle Accelerator Society of Japan, 102-104, 2004
  235. Plasma traps for beam dynamics studies, Bull. Am. Phys. Soc., 69-69, 2004
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  240. 高品質荷電粒子ビームとプラズマ物理, Journal of Plasma and Fusion Research, 82(4), 187-195, 2010
  241. Annular vortex merging processes in non-neutral electron plasmas, AIP Conf. Proc., 1668, 030003, 2015
  242. Production of Arq+ ions with a tandem linear Paul trap, AIP Conf. Proc., 1668, 040006, 2015
  243. A low energy positron accumulator for the plasma confinement in a compact magnetic mirror trap, AIP Conf. Proc., 1668, 040005, 2015
  244. Autoresonances with a damping force, AIP Conf. Proc., 1668, 050006, 2015
  245. Design study of a multipole ion trap for beam physics applications, Plasma and Fusion Res., 10, 1401081, 2015
  246. Free-energy formula for emittance-growth estimation in intense mismatched beams, Prog. Theor. Exp. Phys., 093G01, 2015
  247. ★, Double stop-band structure near half-integer tunes in high-intensity rings, Physical Review Accelerators and Beams, 19, 114201, 201611
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  248. Autoresonances of m=2 diocotron oscillations in non-neutral electron plasmas, PHYSICAL REVIEW E, 94(4), 20161024
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  254. A new method to measure the beta function in a Paul trap, Journal of Physics, 1067, 062016, 201803
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  256. Stability tune diagram of a high-intensity hadron ring, Proc. International Particle Accelerator Conference, 3141-3144, 201903
  257. Hamiltonian formalism of intense beams in drift-tube linear accelerators, Proc. International Particle Accelerator Conference, 3145-3147, 201903
  258. Non-neutral electron plasmas confined with a nested potential in a uniform magnetic field, JAPANESE JOURNAL OF APPLIED PHYSICS, 58(8), 20190801
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  259. A compact Paul ion trap for the study of space-charge effects in drift-tube linear accelerators, Prog. Theor. Exp. Phys., 093G01, 201909
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  260. 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, 738-741, 201910
  261. 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, 441-444, 201910
  262. On the construction of a stability tune diagram for high-intensity hadron rings, Proc. 16th Meeting of Particle Accelerator Society of Japan, 218-222, 201910
  263. Accumulating laser-coolable ions in a linear Paul trap for ultrahigh-density beam dynamics experiment, Journal of Physics: Conf. Series, 1350, 012126, 201912
  264. Experimental observation of low-order collective oscillation modes in a strong-focusing lattice, Journal of Physics: Conf. Series, 1350, 012125, 201912
  265. Reply to "Comment on 'Empirical condition of betatron resonances with space charge'", Phys. Rev. Accel. Beams, 23, 028002, 202002
  266. Coherent and incoherent space-charge effects in high-intensity hadron rings, Journal of Instrumentation, 15, P07017, 20200723
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  267. Coherent and incoherent space-charge effects in high-intensity hadron rings, JOURNAL OF INSTRUMENTATION, 15(7), 202007
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  268. Novel tabletop experiment demonstrating the nonlinear resonance excitation observed at the CERN Proton Synchrotron, JAPANESE JOURNAL OF APPLIED PHYSICS, 60(7), 20210701
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  269. Application of a compact ion trap to fundamental beam-dynamics studies, JPS Conf. Proc., 35(011007), 202106
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  271. Novel tabletop experiment demonstrating the nonlinear resonance excitation observed at the CERN Proton Synchrotron, Jpn. J. Appl. Phys., 60(7), 070901, 20210610
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  274. Experimental Demonstration of Nonlinear Resonances in a Linear Paul Trap, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 90(9), 20210915
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  275. A Linear Paul Trap without the use of the Transverse Quadrupole Field, PLASMA AND FUSION RESEARCH, 17, 20220202
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Publications such as books

  1. 2019/04, ICFA Beam Dynamics Newsletter Vol.76, 2019, April, Scholarly Book, Joint work, 英語, 231, 7
  2. 2018/04, Accelerator Handbook, Doppler laser cooling, Maruzen, 2018, 4, Dictionary/Encyclopedia, Joint work, 日本語, 978-4-621-08901-9

Invited Lecture, Oral Presentation, Poster Presentation

  1. Beam halo formation, Hiromi Okamoto, Annual Meeting of the Physical Society of Japan, 2025/09/17, With Invitation, Japanese, The Physical Society of Japan, Hiroshima University
  2. Dynamics of high-intensity hadron beams, Hiromi Okamoto, Annual Meeting of the Physical Society of Japan, 2024/09/17, With Invitation, Japanese, The Physical Society of Japan
  3. Application of a compact ion trap to fundamental beam-dynamics studies, Hiromi Okamoto, 10th International Conference on Nuclear Physics at Storage Rings, 2017, With Invitation, English, Kanazawa, Japan
  4. Experimental simulation of intense beam dynamics with a Paul ion trap, Hiromi Okamoto, the Frontiers of Intense Beam Modeling, 2016/10, With Invitation, English, Colorado, USA

Social Activities

History as Peer Reviews of Academic Papers

  1. 2024, Progress of Theoretical and Experimental Physics, Editor
  2. 2023, Progress of Theoretical and Experimental Physics, Editor
  3. 2022, Progress of Theoretical and Experimental Physics, Editor