Kiyokazu Itou

Last Updated :2021/04/06

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. 2021, Undergraduate Education, First Semester, Laboratory in PhysicsI
  2. 2021, Undergraduate Education, Second Semester, Laboratory in PhysicsII
  3. 2021, Graduate Education (Master's Program) , 4Term, Exercises in Basic Sciences of Matter B
  4. 2021, Graduate Education (Master's Program) , First Semester, Seminar on Basic Sciences of Matter A
  5. 2021, Graduate Education (Master's Program) , Second Semester, Seminar on Basic Sciences of Matter B
  6. 2021, Graduate Education (Master's Program) , Academic Year, Academic Presentation in Basic Sciences of Matter
  7. 2021, Graduate Education (Master's Program) , 1Term, Exercises in Basic Sciences of Matter A
  8. 2021, Graduate Education (Master's Program) , 2Term, Exercises in Basic Sciences of Matter A
  9. 2021, Graduate Education (Master's Program) , 3Term, Exercises in Basic Sciences of Matter B
  10. 2021, Graduate Education (Master's Program) , Academic Year, Advanced Study in Quantum Matter

Research Activities

Academic Papers

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

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