hiroyuki higaki

Last Updated :2025/01/07

Affiliations, Positions
Graduate School of Advanced Science and Engineering, Associate Professor
Web Site
https://home.hiroshima-u.ac.jp/hhigaki/index.html
E-mail
hhigakihiroshima-u.ac.jp
Self-introduction
Experimental studies on the confinement of charged particles with an electromagnetic field, the production of low energy charged particle beams and the application of the beams for the related plasma physics, beam physics and atomic physics research.

Basic Information

Major Professional Backgrounds

  • 2020/04/01, Hiroshima University, Graduate School of Advanced Science and Engineering, Associate Professor

Academic Degrees

  • Doctor (Human and Environmental Studies), Kyoto University
  • Master, Kyoto University

Educational Activity

  • [Bachelor Degree Program] School of Science : Physics : Physics
  • [Master's Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Quantum Matter Program
  • [Doctoral Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Quantum Matter Program

Research Fields

  • Mathematical and physical sciences;Plasma science;Plasma science
  • Mathematical and physical sciences;Physics;Atomic / Molecular / Quantum electronics
  • Mathematical and physical sciences;Physics;Particle / Nuclear / Cosmic ray / Astro physics

Research Keywords

  • plasma physics
  • beam physics
  • atomic physics

Educational Activity

Course in Charge

  1. 2024, Undergraduate Education, Second Semester, MechanicsB
  2. 2024, Undergraduate Education, Second Semester, Introduction of Physics
  3. 2024, Undergraduate Education, 4Term, Advanced Physics
  4. 2024, Undergraduate Education, First Semester, Special Study for Graduation A
  5. 2024, Undergraduate Education, Second Semester, Special Study for Graduation B
  6. 2024, Graduate Education (Master's Program) , First Semester, Seminar on Basic Sciences of Matter A
  7. 2024, Graduate Education (Master's Program) , Second Semester, Seminar on Basic Sciences of Matter B
  8. 2024, Graduate Education (Master's Program) , Academic Year, Academic Presentation in Basic Sciences of Matter
  9. 2024, Graduate Education (Master's Program) , 1Term, Exercises in Basic Sciences of Matter A
  10. 2024, Graduate Education (Master's Program) , 2Term, Exercises in Basic Sciences of Matter A
  11. 2024, Graduate Education (Master's Program) , 3Term, Exercises in Basic Sciences of Matter B
  12. 2024, Graduate Education (Master's Program) , 4Term, Exercises in Basic Sciences of Matter B
  13. 2024, Graduate Education (Master's Program) , 2Term, Beam Physics
  14. 2024, Graduate Education (Master's Program) , Academic Year, Advanced Study in Quantum Matter
  15. 2024, Graduate Education (Doctoral Program) , Academic Year, Advanced Study in Quantum Matter

Research Activities

Academic Papers

  1. Injection and confinement of positron bunches in a magnetic dipole trap, Phys. Rev. E, 110(2), L023201-1-L023201-6, 20240809
  2. Injection and capture of antiprotons in a Penning-Malmberg trap using a drift tube accelerator and degrader foil, Nucl. Instrum. Methodes Phys. Res. A, 1065, 169529-1-169529-7, 20240612
  3. Slow positron production and storage for the ASACUSA-Cusp experiment, J. Plasma Phys., 89(6), 905890608-1-905890608-9, 20231218
  4. SDR, EVC, and SDREVC: Limitations and Extensions, J. Plasma Phys., 89(5), 955890501-1-955890501-11, 20231031
  5. The buncher and the magnetic lens for the LINAC based low energy positron beams at AIST, Plasma and Fusion Res., 18, 1406023-1-1406023-6, 20230427
  6. Efficient positron trapping and extraction with a centre-hole SiC remoderator, New J. Phys., 24, 123039-1-123039-11, 20221230
  7. Reducing the background temperature for cyclotron cooling in a cryogenic Penning-Malmberg trap, Phys. Plasmas, 29(8), 083303-1-083303-12, 20220823
  8. Measurement of the principal quantum number distribution in a beam of antihydrogen atoms, Eur. Phys. J. D 75 (2021) 91, 20210308
  9. Accumulation of LINAC based low energy positrons in a buffer gas trap, Appl. Phys. Express 13 (2020) 066003, 20200528
  10. Non-neutral electron plasmas confined with a nested potential in a uniform magnetic field, Jpn. J. Appl. Phys. 58 (2019) 080912, 20190802
  11. Antiproton beams with low enrgy spread for antihydrogen production, Journal of Instrumentation, 14, P05009-1-P05009-12, 20190513
  12. Monte-Carlo based performance assessment of ASAUSA's antihydrogen detector, Nucl. Instrum. Methods A, 910, 90-95, 2018
    Link to Paper Search Results by DOI
  13. Imaging antimatter with a Micromegas detector, Nucl. Instrum. Methods B, 422, 1-6, 20180302
    Link to Paper Search Results by DOI
  14. The ASACUSA antihydrogen and hydrogen program: results and prospects, Philosophical Transactions of The Royal Society A, 376, 20170273-1-20170273-12, 20180219
    Link to Paper Search Results by DOI
  15. Simultaneous confinement of low-energy electrons and positrons in a compact magnetic mirror trap, New J. Phys. 19 (2017) 023016, 20170203
    Link to Paper Search Results by DOI
  16. Autoresonances of m=2 diocotron oscillations in non-neutral electron plasmas, Phys. Rev. E, 94(04), 043204-1-043204-6, 20161024
  17. Phase Space Volumes of Non-Neutral Plasmas during Vortex Merging Processes, Plasma and Fusion Res., 10, 1201004-1-1201004-3, 201501
  18. A source of antihydrogen for in-flight hyperfine spectroscopy, NATURE COMMUNICATIONS, 5, 201401
    Link to Paper Search Results by DOI
  19. Nonneutral Electron Plasmas Confined in a Compact Magnetic Mirror Trap, APPLIED PHYSICS EXPRESS, 5(10), 201210
    Link to Paper Search Results by DOI
  20. Development of a monoenergetic ultraslow antiproton beam source for high-precision investigation, PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS, 15(2), 20120217
    Link to Paper Search Results by DOI
  21. 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
  22. Synthesis of Cold Antihydrogen in a Cusp Trap, PHYSICAL REVIEW LETTERS, 105(24), 20101207
    Link to Paper Search Results by DOI
  23. Electrostatic Oscillations Observed in Non-Neutral Electron Plasmas Confined in a Magnetic Field Gradient, Plasma Fusion Res., 5(-), 029 (1-3), 20100701
  24. 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
  25. 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
  26. Measurement of ion cyclotron emissions by use of ICRF heating antennas in LHD, FUSION ENGINEERING AND DESIGN, 84(7-11), 1676-1679, 200906
    Link to Paper Search Results by DOI
  27. Determination of Transverse Distributions of Ion Plasmas Confined in a Linear Paul Trap by Imaging Diagnostics, JAPANESE JOURNAL OF APPLIED PHYSICS, 47(10), 8017-8025, 200810
    Link to Paper Search Results by DOI
  28. Accumulating low energy charged particles with a magnetic mirror trap and cyclotron resonance heating, APPLIED PHYSICS EXPRESS, 1(6), 200806
    Link to Paper Search Results by DOI
  29. Observation of spontaneously excited waves in the ion cyclotron frequency range on JT-60U, Nuclear Fusion, 48, 035012-1-035012-7, 20080207
  30. 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
  31. High Frequency Alfven Eigen Modes Observed in LHD, Plasma and Fusion Reserch, 1, 034, 20060601
  32. Confinement of a Large Number of Antiprotons and Production of an Ultraslow Antiproton Beam, Phys. Rev. Lett., 94, 023401-1-023401-4, 200501
  33. Radial compression of protons and H3+ ions in a multiring trap for the production of ultralow energy antiproton beams, Phys. Rev. E, 70, 026501-1-026501-5, 200408
  34. Electron cooling of high-energy protons in a multiring trap with a tank circuit monitoring the electron-plasma oscillations, Phys. Rev. E, 65, 046410-1-046410-5, 200204
  35. The decay instability of Langmuir Waves in the nonneutral electron plasma column, Plasma Phys. Control. Fusion, 39(11), 1793-1803, 199711
  36. Experiment on diocotron oscillations of spheroidal non-neutral electron plasmas in a multi-ring-electrode trap, Physics Letters A, 235, 504-507, 199711
  37. Wall and Temperature Effects on Electrostatic Oscillations of Shperoidal Non-neutral Electron Plasmas in the Multi-Ring Electrode Trap, Jpn. J. Appl. Phys., 36 Pt.1(8), 5300-5305, 199708
  38. Application of a Compact Ion Trap to Fundamental Beam-Dynamics Studies, JPS Conference Proceedings, 35, 011007-1-011007-8, 20210615
  39. Accumulating laser-coolable ions in a linear Paul trap for ultrahigh-density beam dynamics experiment, J. Phys. Conf. Ser., 1350, 012126-1-012126-5, 20191210
  40. Experimental observation of low-order collective oscillation modes in a strong-focusing lattice, J. Phys. Conf. Ser., 1350, 012125-1-012125-6, 20191210
  41. Simulations on Mixing Charged Particles in a Nested Penning Trap, JPS Conf. Proc., 18, 011013-1-011013-6, 20171124
    Link to Paper Search Results by DOI
  42. Progress of antihydrogen beam production using a double cusp trap, JPS Conf. Proc., 18, 011007-1-011007-10, 20171124
    Link to Paper Search Results by DOI
  43. Autoresonances with a Damping Force, AIP Conference Proceedings, 1668, 050006-1-050006-6, 20150629
    Link to Paper Search Results by DOI
  44. Production of Ar^q+ ions with a Tandem Linear Paul Trap, AIP Conference Proceedings, 1668, 040006-1-040006-6, 20150629
    Link to Paper Search Results by DOI
  45. A Low Energy Positron Accumulator for the Plasma Confinement in a Compact Magnetic Mirror Trap, AIP Conference Proceedings, 1668, 040005-1-040005-6, 20150629
    Link to Paper Search Results by DOI
  46. Towards the production of anti-hydrogen beams, AIP Conf. Proc., 1521, 134-143, 201303
  47. A Tank Circuit Monitoring a Large Number of Antiprotons in MUSASHI for the Production of Low Energy Antiproton Beams, Proceedings of IPAC’10 Kyoto Japan, 948-950, 20100501
  48. Mismatch Induced Oscillations of Space Charge Dominated Beams in a Uniform Focusing Channel, 1336-1338, 20100501
  49. A tandem linear Paul trap as an ion source, J. Phys. Conf. Ser., 163, 012102-1-012102-4, 200906
  50. Electrons Confined with an Axially Symmetric Magnetic Mirror Field, AIP Conf. Proc., 1037, 106-114, 200808
  51. Visible Light and Ha Imaging of Mirror Confined Plasmas in the Central Cell of GAMMA 10, Transactions of Fusion Science and Technology, 51(2T), 361, 20070201
  52. 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
  53. On the Possibility of Non-Neutral Antiproton Plasmas and Antiproton-Positron Plasmas, AIP Conf. Proc., 793, 351-360, 200510

Invited Lecture, Oral Presentation, Poster Presentation

  1. Low energy positron accumulation with an electron LINAC at AIST, H. Higaki, K. Michishio, A. Ishida and N. Ohshima, 13th International Workshop on Non-Neutral Plasmas, 2022/09/19, With Invitation, English, Milano, Italy
    Related URL
  2. Progress towards the confinement of a low energy electron-positron plasma in a magnetic mirror trap, Hiroyuki Higaki, C.Kaga, K.Fukushima, H.Okamoto, Y.Nagata, Y.Kanai, Y.Yamazaki, 12th International Workshop on Non-Neutral Plasmas, 2017/07/11, With Invitation, English, Lawrence University, Appleton, WI USA
  3. Anti-particle Accumulation for Low Energy Exotic Beams, H. Higaki, ASACUSA-MUSASHI, COOL15, 2015/09/28, With Invitation, English, Thomas Jefferson National Accelerator Facility Newport News, VA, USA
    Related URL
  4. A Low Energy Positron Accumulator for the Plasma Confinement in a Compact Magnetic Mirror Trap, H.Higaki, C. Kaga, K. Nagayasu, H. Okamoto, Y. Nagata, Y. Kanai, and Y. Yamazaki, 11th International Workshop on Non-Neutral Plasmas, 2014/12/01, Without Invitation, English, H. Higaki, K. Ito, H. Himura, H. Saitoh, Y. Soga, A. Sanpei, and Y. Yatsuyanagi, Sunport Hall Takamatsu, Japan, A low energy positron accumulator was constructed at RIKEN for the purpose of confining an electron-positron plasma. The use of 5 mCi 22Na RI source with a standard solid Ne moderator and N2 buffer gas cooling resulted in a low energy positron yield of ~ 3 x 10^5 e+/s. So far, 2 x 10^6 positrons have been accumulated in 120s.
    Related URL
  5. Towards the production of anti-hydrogen beams, H. Higaki, ASACUSA-MUSASHI, 10th International Workshop on Non-neutral Plasmas, 2012/08/27, With Invitation, English, MPI for Plasma physics, Greifswald, Germany