Kiyokazu Itou

Last Updated :2024/04/03

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

Basic Information

Academic Degrees

  • Doctor of Philosophy, Kyoto University
  • Master of Engineering, University of Tsukuba

Research Fields

  • Mathematical and physical sciences;Plasma science;Plasma science

Research Keywords

  • Chargal Particle beam
  • Beam dynamics
  • nonneutral plasma
  • interaction among vortices
  • Self organization

Educational Activity

Course in Charge

  1. 2024, Undergraduate Education, First Semester, Laboratory in PhysicsI
  2. 2024, Undergraduate Education, Second Semester, Laboratory in PhysicsII
  3. 2024, Graduate Education (Master's Program) , First Semester, Seminar on Basic Sciences of Matter A
  4. 2024, Graduate Education (Master's Program) , Second Semester, Seminar on Basic Sciences of Matter B
  5. 2024, Graduate Education (Master's Program) , Academic Year, Academic Presentation in Basic Sciences of Matter
  6. 2024, Graduate Education (Master's Program) , 1Term, Exercises in Basic Sciences of Matter A
  7. 2024, Graduate Education (Master's Program) , 2Term, Exercises in Basic Sciences of Matter A
  8. 2024, Graduate Education (Master's Program) , 3Term, Exercises in Basic Sciences of Matter B
  9. 2024, Graduate Education (Master's Program) , 4Term, Exercises in Basic Sciences of Matter B
  10. 2024, Graduate Education (Master's Program) , Academic Year, Advanced Study in Quantum Matter

Research Activities

Academic Papers

  1. Development of a compact plasma trap for experimental beam physics, Jap. J. Appl. Phys., 45(6A), 5332-5343, 200606
  2. Relaxation of azimuthal flow pattern from ring to bell shape through two-dimensional turbulence triggered by diocotron instability, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 75(10), 104502-1-104502-8, 200610
  3. Nonlinear resonance effects in a linear Paul trap, J. Phys. Soc. Jpn., 76(1), 014802-1-014802-8, 200701
  4. Properties of non-neutral electron plasmas confined with a magnetic mirror field, PHYSICAL REVIEW E, 75(6), 066401-1-066401-5, 200706
  5. Formation of a symmetric vortex configuration in a pure electron plasma trapped with a penning trap, HYPERFINE INTERACTIONS, 174(1-3), 71-76, 200701
  6. Axial resonances of Ar+ ions observed in a linear Paul trap, HYPERFINE INTERACTIONS, 174(1-3), 77-82, 200701
  7. Density and potential profiles of non-neutral electron plasmas in a magnetic mirror field, PHYSICAL REVIEW E, 81(1), 01640-1-01640-8, 20100107
  8. Experimental study of coherent betatron resonances with a Paul trap, Phys. Rev. STAB, 13(4), 044201-1-044201-12, 20100419
  9. Controlled Extraction of Ultracold Ions from a Linear Paul Trap for Nanobeam Production, J. Phys. Soc. Jpn., 79(12), 124502-1-124502-8, 20101210
  10. Dark-lifetime degradation of GaAs photo-cathode at higher temperature, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 637, S87-S90, 20110501
  11. Cyclotron Emission Spectra from Collsionless Electrons Resonantly Heated by Cyclotron Waves in a Magnetic Mirror, Fusion Engineering and Design, 53, 229-236, 2001
  12. Generation of Vorticity Hole Surrounding a Point Vortex, J. Phys. Soc. Jpn., 70(10), 2813-2816, 200110
  13. Controlled experiment of two-dimensional vortex dynamics, J. Plasma Fusion Res. SERIES, 4, 未定, 2001
  14. Determination of stream function of 2D vortex in nonneutral plasma and testing sector probe signals, J. Plasma Fusion Res. SERIES, 4, 550-554, 2001
  15. Vorticity hole surrounding a point vortex, J. Plasma Fusion Res. SERIES, 4, 未定, 2001
  16. ★, Field analysis of two-dimensional dynamics of nonneutral plasma with imaging diagnostics and examination of sector-probing, Jpn. J. Appl. Phys., 40(4), 2558-2565, 200104
  17. Two-dimensional vortex dynamics in a potential-confined electron plasma, Trans. Fusion Technology, 39, 119-126, 200101
  18. ★, Dynamics of electron-plasma vortex in background vorticity distribution, Phys. Rev. Lett., 85, 3173-3176, 20000909
  19. ★, Strong narrow-band electron cyclotron emission from a mirror plasma heated by electron cyclotron waves, Phys. Plasmas, 7, 4923-4930, 200012
  20. Observation of cyclotron waves resonantly excited under electron cyclotron resonance heating at magnetic beach, J. Plasma Fusion Res. SERIEES, 2, 303-306, 1999
  21. Measurement and control of end loss electrons from the GAMMA 10 tandem mirror, Trans. Fusion Technology, 35, 233-237, 199901
  22. Pinhole Camera Imaging of X-rays and Energetic Neutral Atoms for Hot Plasma Diagnostics, Rev. of Scientific Instrum., 69, 2574-2575, 199806
  23. Design and fabrication of a linear Paul trap for the study of space-charge-dominated beams, Nucl. Instrum. Meth. A, 532, 508-512, 200406
  24. Accelerated merging of electron vortices in background vorticity, J. Phys. Soc. Jpn., 68, 3766-3769, 199912
  25. Coulomb Crystal Extraction from an Ion Trap for Application to Nano-Beam source, Proceedings of IPAC 2010, 3622-3624, 2010
  26. S-POD experiments of space-charge-dominated beam resonances, Proceedings of IPAC 2010, 1339-1341, 2010
  27. DEVELOPMENT OF A PHOTOCATHODE TEST BENCH USING A CRYO-PUMP AND A NEG PUMP, Proceedings of IPAC 2010, 2326-2328, 2010
  28. Mismatch Induced Oscillations of Space Charge Dominated Beams in a Uniform Focusing Channel, Proceedings of IPAC 2010, 1336-1338, 2010
  29. Electrostatic Oscillations Observed in Non-Neutral Electron Plasmas Confined in a Magnetic Field Gradient, Plasma Fusion Res., 5(-), 029 (1-3), 201007
  30. Tune depression of ion plasmas observed in a linear Paul trap, J. Plasma Fusion Res. SERIES, 8, 959-962, 2009
  31. A study of Lifetime of GaAs Photocathode for High Brightness Electron Source, Proc. Of 23rd Particle Accelerator Conference(PAC09) Vancouver Canada, MO6RFP069, 20090501
  32. A tandem linear Paul trap as an ion source, Journal of Physics:Conference Series, 163(1), 012102-1-012102-4, 2009
  33. Nano-beam production by RFQ with ion-trap injector, INTERNATIONAL JOURNAL OF APPLIED ELECTROMAGNETICS AND MECHANICS, 14(1-4), 283-287, 2001
  34. Accumulating low energy charged particles with a magnetic mirror trap and cyclotron resonance heating, APPLIED PHYSICS EXPRESS, 1(6), 066002-1-066002-3, 200806
  35. ★, 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
  36. Experimental study of resonance crossing with a Paul trap, PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS, 15(7), 074201-1-074201-14, 20120718
  37. Nonneutral Electron Plasmas Confined in a Compact Magnetic Mirror Trap, APPLIED PHYSICS EXPRESS, 5(10), 106001-1-106001-3, 201210
  38. Experimental simulation of beam propagation over long path lengths using radio-frequency and magnetic traps, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 733, 119-128, 20140101
  39. Experimental verification of resonance instability bands in quadrupole doublet focusing channels, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 733, 18-24, 20140101
  40. Experimental study of integer resonance crossing in a nonscaling fixed field alternating gradient accelerator with a Paul ion trap, PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS, 18(3), 034001-1-034001-13, 20150317
  41. 2-D Interaction of Discrete Electron Vortices, Non-neutral Plasma Physics III (AIP Conf. Proc. 498), 99-105, 1999
  42. Formation of a vortex crystal cell assisted by a background vorticity distribution, Phys. Rev. E, 68, 016404-1-016404-6, 20031111
  43. SIMULATION STUDY ON COHERENT RESONANT INSTABILITY OF NON-NEUTRAL PLASMAS CONFINED IN A LINEAR PAUL TRAP, Proceedings of IPAC 2010, 4668-4670, 2010
  44. Phase space volumes of non-neutral electron plasmas during vortex merging processes, Plasma and Fusion Res., 10, 121004-1-121004-3, 2014
  45. Experimental study on dipole motion of an ion plasma confined in a linear Paul trap, HYPERFINE INTERACTIONS, 20150611
  46. Recent results from the S-POD trap systems on the stability of intense hadron beams, Proceedings of HB2014, 178-182, 2014
  47. Beam dynamics studies with non-neutral plasma traps, Proceedings of IPAC 2014, 4052-4056, 2014
  48. Autoresonances with a Damping Force, AIP Conference Proceedings, 1668, 050006-1-050006-6, 2015
  49. Production of Ar^q+ ions with a Tandem Linear Paul Trap, AIP Conference Proceedings, 1668, 040006-1-040006-6, 2015
  50. A Low Energy Positron Accumulator for the Plasma Confinement in a Compact Magnetic Mirror Trap, AIP Conference Proceedings, 1668, 040005-1-040005-6, 2015
  51. Annular Vortex Merging Processes in Non-Neutral Electron Plasmas, AIP Conference Proceedings, #1668, 030003-1-030003-5, 2015
  52. Autoresonances of m=2 diocotron oscillations in non-neutral electron plasmas, PHYSICAL REVIEW E, 94(4), 20161024
  53. Double stop-band structure near half-integer tunes in high-intensity rings, PHYSICAL REVIEW ACCELERATORS AND BEAMS, 19(11), 20161102
  54. Coherent resonance stop bands in alternating gradient beam transport, PHYSICAL REVIEW ACCELERATORS AND BEAMS, 20(6), 20170622
  55. Effect of quadrupole focusing-field fluctuation on the transverse stability of intense hadron beams in storage rings, PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, 201802
  56. Non-neutral electron plasmas confined with a nested potential in a uniform magnetic field, JAPANESE JOURNAL OF APPLIED PHYSICS, 58(8), 20190801
  57. A compact Paul ion trap for the study of space-charge effects in drift-tube linear accelerators, PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS, 201909
  58. Experimental observation of low-order collective oscillation modes in a strong-focusing lattice, J. Phys.: Conf. Ser., 1350, 012125, 20191211
  59. Accumulating laser-coolable ions in a linear Paul trap for ultrahigh- density beam dynamics experiment, J. Pjys.: Conf. Ser., 1350, 012126, 20191211
  60. Novel tabletop experiment demonstrating the nonlinear resonance excitation observed at the CERN Proton Synchrotron, JAPANESE JOURNAL OF APPLIED PHYSICS, 60(7), 20210701

Invited Lecture, Oral Presentation, Poster Presentation

  1. Accumulating Laser-Coolable Ions in a Linear Paul Trap for Ultrahigh-Density Beam Dynamics Experiment, K. Ito, H. Higaki, T. Masuda, H. Okamoto,  10th International Particle Accelerator Conference, 2019/05/19, Without Invitation, English, ANSTRO, Melbourne, Australia
  2. Experimental Observation of Low-Order Collective Oscillation Mode in a Strong-Focusing Lattice, K. Ito, H. Higaki, H. Okamoto, T. Kurachi,  10th International Particle Accelerator Conference, 2019/05/19, Without Invitation, English, Melbourne, Australia
  3. Experimental study of dipole motion of an ion plasma confined in a linear Paul trap, K. Ito, K. Moriya, T. Okano, K. Fukushima, H. Higaki, H. Okamoto, International conference on Trapped Charged Particles and Fundamental Physics, 2014/12/01, Without Invitation, English, RIKEN, Kagawa International Conference Hall

External Funds

Acceptance Results of Competitive Funds

  1. KAKENHI, Proof-of-principle experiments on Nano ion beam production using Coulomb crystal, 2011, 2013
  2. KAKENHI, 2009, 2010
  3. KAKENHI, ACCELERATOR-FREE EXPERIMENTS FOR THE PRODUCTION AND STABILIZATION OF NEXT-GENERATION HADRON BEAMDS, 2009, 2011
  4. KAKENHI, Experimental study on evolution of a beam halo by an ion plasma, 2009, 2010
  5. KAKENHI, 2007, 2008
  6. KAKENHI, 2012, 2014
  7. KAKENHI, Experimental study of non-linear resonance on beam with ion plasmas, 2007, 2008
  8. KAKENHI, Realization of the phase transition of a charged particle beams, 2005, 2007
  9. KAKENHI, 2005, 2006
  10. KAKENHI, Radiation Generation and Particle Acceleration using Photonic Crystal, 2003, 2004
  11. KAKENHI, Toward the realization of crystalline beams-----Overall investigation of the fundamental properties of ultracold ion beams-----, 2002, 2004
  12. KAKENHI, 2002, 2003
  13. KAKENHI, 2015, 2018
  14. KAKENHI(Grant-in-Aid for Scientific Research (C)), 2017, 2019