MASAHIRO KATOH

Last Updated :2023/01/05

Affiliations, Positions
Hiroshima Synchrotron Radiation Center, Professor
E-mail
mkatohhiroshima-u.ac.jp
Self-introduction
I am interested in producing light beam using an electron accelerator, investigating and controlling their properties.

Basic Information

Academic Degrees

  • The University of Tokyo
  • TOHOKU 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 : Physics Program
  • [Doctoral Program] Graduate School of Advanced Science and Engineering : Division of Advanced Science and Engineering : Physics Program

Educational Activity

Course in Charge

  1. 2022, Liberal Arts Education Program1, 2Term, Science and Radiation
  2. 2022, Undergraduate Education, First Semester, Exercises in Electromagnetism
  3. 2022, Undergraduate Education, First Semester, Special Study for Graduation A
  4. 2022, Undergraduate Education, Second Semester, Special Study for Graduation B
  5. 2022, Graduate Education (Master's Program) , 1Term, Special Topics in Synchrotron Radiation Science A
  6. 2022, Graduate Education (Master's Program) , 2Term, Special Topics in Synchrotron Radiation Science B
  7. 2022, Graduate Education (Master's Program) , 3Term, Laboratory in Synchrotron Radiation Science
  8. 2022, Graduate Education (Master's Program) , 1Term, Exercise in Physics I
  9. 2022, Graduate Education (Master's Program) , 2Term, Exercise in Physics I
  10. 2022, Graduate Education (Master's Program) , 3Term, Exercise in Physics II
  11. 2022, Graduate Education (Master's Program) , 4Term, Exercise in Physics II
  12. 2022, Graduate Education (Master's Program) , 1Term, Special Exsecise in Physics A
  13. 2022, Graduate Education (Master's Program) , 2Term, Special Exsecise in Physics A
  14. 2022, Graduate Education (Master's Program) , 3Term, Special Exsecise in Physics B
  15. 2022, Graduate Education (Master's Program) , 4Term, Special Exsecise in Physics B
  16. 2022, Graduate Education (Master's Program) , Academic Year, Special Research in Physics
  17. 2022, Graduate Education (Doctoral Program) , Academic Year, Special Research in Physics

Research Activities

Academic Papers

  1. Orbital angular momentum of Liénard–Wiechert fields, Progress of Theoretical and Experimental Physics, 2019(8), 083A02-1-18
  2. pn -type substrate dependence of CsK2Sb photocathode performance, Physical Review Accelerators and Beams, 20190300
  3. Demonstration of tomographic imaging of isotope distribution by nuclear resonance fluorescence, AIP Advances, 9(3), 20190300
  4. Generation of vector beam with tandem helical undulators, Applied Physics Letters, 113(2), 20180700
  5. Generation of Optical Vortices by Nonlinear Inverse Thomson Scattering at Arbitrary Angle Interactions, The Astrophysical Journal, 860(1), 45, 20180600
  6. Gamma-ray vortices emitted from nonlinear inverse Thomson scattering of a two-wavelength laser beam, Physical Review A, 98(5), 20180000
  7. Generation of 1-MeV quasi-monochromatic gamma-ray for precise measurement of Delbrück scattering by laser Compton scattering, Journal of Physics: Conference Series, 1067(9), 20180000
  8. Angular Momentum of Twisted Radiation from an Electron in Spiral Motion, Physical Review Letters, 118(9), 094801-1-094801-5, 20170300
  9. Observation of an optical vortex beam from a helical undulator in the XUV region, Journal of Synchrotron Radiation, 24(5), 934-938, 20170000
  10. Limitations in photoionization of helium by an extreme ultraviolet optical vortex, Physical Review A, 95(2), 20170000
  11. Helical Phase Structure of Radiation from an Electron in Circular Motion, Scientific Reports, 7(1), 20170000
  12. Gamma-ray vortices from nonlinear inverse Thomson scattering of circularly polarized light, Scientific Reports, 7(1), 20170000
  13. Generation of High Energy Gamma-ray by Laser Compton Scattering of 1.94-m Fiber Laser in UVSOR-III Electron Storage Ring, Energy Procedia, 89, 335-345, 20160000
  14. Investigation of the electrical field sensitivity of sub-μm Y-Ba-Cu-O detectors, IEEE Transactions on Applied Superconductivity, 25(3), 20150000
  15. Transient response of relativistic electron bunches to wave-number selected perturbations near the micro-bunching instability threshold, New Journal of Physics, 16, 20140000
  16. Microbunching Instability in Relativistic Electron Bunches: Direct Observations of the Microstructures Using Ultrafast YBCO Detectors, Physical Review Letters, 113(9), 094801, 20140000
  17. Beam injection with pulsed multipole magnet at UVSOR-III, Nuclear Instruments and Methods in Physics Research A, 767, 26-33, 20140000
  18. Saturation of the laser-induced narrowband coherent synchrotron radiation process: Experimental observation at a storage ring, Physical Review Special Topics - Accelerators and Beams, 16(2), 20130000
  19. Photoreaction of rac-Leucine in Ice by Circularly Polarized Synchrotron Radiation: Temperature-Induced Mechanism Swithing from Norrish Type II to Deamination, CHEMISTRY a European Journal, 19(41), 13929-13936, 20130000
  20. Photon-induced positron annihilation lifetime spectroscopy using ultrashort laser-Compton-scattered gamma-ray pulses, Review of Scientific Instruments, 84(5), 20130000
  21. High-speed Y-Ba-Cu-O direct detection system for monitoring picosecond THz pulses, IEEE Transactions on Terahertz Science and Technology, 3(1), 81-86, 20130000
  22. Design and construction of UVSOR-III, Journal of Physics: Conference Series, 425(PART 4), 20130000
  23. Construction of the scanning transmission X-ray microscope beamline at UVSOR, Journal of Physics: Conference Series, 463(1), 20130000
  24. Terahertz photonics: Coherent terahertz synthesizer, Nature Photonics, 6(2), 76-77, 20120000
  25. Suppression of self-pulsing instabilities in free-electron lasers using delayed optical feedback, Physical Review Special Topics - Accelerators and Beams, 15(4), 20120000
  26. Pulse width measurement of laser Compton scattered gamma rays in picosecond range, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 695, 233-237, 20120000
  27. Electric field detection of coherent synchrotron radiation in a storage ring generated using laser bunch slicing, Applied Physics Letters, 100(11), 111112, 20120000
  28. Design of a dedicated beamline for THz coherent synchrotron radiation at UVSOR-III, Journal of Physics: Conference Series, 359(1), 20120000
  29. Ultra-short coherent terahertz radiation from ultra-short dips in electron bunches circulating in a storage ring, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 637(1 SUPPL.), 20110000
  30. Generation of energy-tunable and ultrashort-pulse gamma ray via inverse Compton scattering in an electron storage ring, Nuclear Instruments and Methods in Physics Research Section A, 652(1), 696-700, 20110000
  31. Feasibility study of ultra-short gamma ray pulse generation by laser Compton scattering in an electron storage ring, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 637(1 SUPPL.), 20110000
  32. Systematic study on Ce:LuLiF4 as a fast scintillator using storage ring free-electron lasers, Japanese Journal of Applied Physics, 49(12), 20100000
  33. Status and prospects of coherent light source developments at UVSOR-II, AIP Conference Proceedings, 1234, 491-494, 20100000
  34. Remaining noise-induced spatiotemporal dynamics in a free electron laser stabilized by feedback control, European Physical Journal D, 59(3), 451-455, 20100000
  35. Observation of saturation Effect on Vacuum Ultraviolet Coherent Harmonic Generation at UVSOR-II, Applied Physics Express, 3(12), 122702-KM006350, 20100000
  36. Laser-induced narrowband coherent synchrotron radiation: Efficiency versus frequency and laser power, Physical Review Special Topics - Accelerators and Beams, 13(9), 20100000
  37. Full energy injection and top-up operation at UVSOR-II, AIP Conference Proceedings, 1234, 531-534, 20100000
  38. Design of terahertz pump - Photoemission probe spectroscopy beamline at UVSOR-II, AIP Conference Proceedings, 1234, 63-65, 20100000
  39. Coherent synchrotron terahertz radiation using electron bunch slicing, IRMMW-THz 2010 - 35th International Conference on Infrared, Millimeter, and Terahertz Waves, Conference Guide, 20100000
  40. Central Japan synchrotron radiation research facility project-(II), AIP Conference Proceedings, 1234, 591-594, 20100000
  41. Shifted feedback suppression of turbulent behavior in advection-diffusion systems, Physical Review Letters, 102(13), 134501, 20090000
  42. Transverse-longitudinal coupling effect in laser bunch slicing, Physical Review Letters, 103(14), 144802, 20090000
  43. Observation of synchrotron sidebands in a storage-ring-based Seeded free-electron laser, Physical Review Letters, 102(1), 014801, 20090000
  44. Tunable narrowband terahertz emission from mastered laser-electron beam-interaction, Nature Physics, 4(390-393), 390-393, 20080000
  45. Optimization of a seeded free-electron laser with helical undulators, Physical Review Letters, 101(16), 164803, 20080000
  46. Local heating induced by Coherent Harmonic Generation on electron beam dynamics in storage ring, EPL, 81(3), 20080000
  47. Touschek lifetime measurement withaspurious bunch in UVSOR-II electron storage ring, 8th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators, DIPAC 2007, 280-282, 20070000
  48. Present status of UVSOR-II, AIP Conference Proceedings, 879, 192-195, 20070000
  49. Nagoya university photo-science nanofactory project, AIP Conference Proceedings, 879, 75-78, 20070000
  50. Design of a high resolution and high flux beam line for VUV angle-resolved photoemission at UVSOR-II, AIP Conference Proceedings, 879, 527-530, 20070000
  51. Intense terahertz synchrotron radiation by laser bunch slicing at UVSOR-II electron storage ring, Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, 46(12), 7939-7944, 20070000
  52. Coherent terahertz radiation at UVSOR-II, AIP Conference Proceedings, 879, 71-74, 20070000
  53. Coherent harmonic generation on UVSOR-II storage ring, European Physical Journal D, 44(1), 187-200, 20070000
  54. Infrared and terahertz spectromicroscopy beam line BL6B(IR) at UVSOR-II, Infrared Physics and Technology, 49(1-2), 147-151, 20060000
  55. Observation of intense bursts of terahertz synchrotron radiation at UVSOR-II, Japanese Journal of Applied Physics, Part 2: Letters, 44(33-36), 20050000
  56. Ion Trapping Phenomenon in UVSOR Electron Storage Ring, Japanese Journal of Applied Physics, Vol. 44, No. 1A, pp. 430-437, 20050000
  57. Construction of the undulator beamline equipped with a UHV-STM for observations of synchrotron-radiation-stimulated surface reaction, Journal of Electron Spectroscopy and Related Phenomena, 144-147 1113-1116, 20050000
  58. Status and prospects of user applications of the UVSOR storage ring free electron laser, AIP Conference Proceedings, 705, 61-64, 20040000
  59. New infrared and terahertz beam line BL6B at UVSOR, AIP Conference Proceedings, 705, 416-419, 20040000
  60. In-vacuum undulators in UVSOR electron storage ring, AIP Conference Proceedings, 705, 259-262, 20040000
  61. Design and performance of undulator beamline (BL7U) for in-situ observation of synchrotron radiation stimulated etching by STM, AIP Conference Proceedings, 705, 368-371, 20040000
  62. Construction and commissioning of UVSOR-II, AIP Conference Proceedings, 705, 49-52, 20040000
  63. Design study of a storage ring light source at Tohoku University, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 467-468, 72-75, 20010000
  64. Bunch lengthening in compact SR source HiSOR, Nuclear Instruments and Methods in Physics Research A, 467-468, 95-98, 20010000
  65. Development of longitudinal feedback system for a storage ring free electron laser, Nuclear Instruments and Methods in Physics Research A, 475, 211-216, 20010000
  66. FEL induced electron bunch heating observed by a method based on synchrotron phase detection, Nuclear Instruments and Methods in Physics Research A, 475, 217-221, 20010000
  67. Ultra-short Pulses of Synchrotron Radiation on Storage Rings, Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, 38(5 PART 2), 547549, 19990000
  68. Reconstruction for the brilliance-upgrading project of the Photon Factory storage ring, Journal of Synchrotron Radiation, 5(3), 366-368, 19980000
  69. Single-pass BPM system of the Photon Factory storage ring, Journal of Synchrotron Radiation, 5(3), 618-620, 19980000
  70. Design of a synchrotron radiation source at Tohoku University, Journal of Synchrotron Radiation, 5(3), 339-341, 19980000
  71. Dynamic aperture for high-brilliance optics of the photon factory storage ring, Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, 36(12 A), 7415-7426, 19970000
  72. "Dynamic Aperture for High Brilliance Optics of the Photon Factory Storage Ring"(共著), Jpn. J. Appl. Phys., 36(12A), 7415-7426, 19970000
  73. "Upgrade of the Photon Factory storage ring for a high brilliance configuration"(共著), Rev. Sci. Instrum., 66(2 Pt 2), 1892-1894, 19950000
  74. "Characteristics of the Five-pole Superconducting Vertical Wiggler at the Photon Factory"(共著), Review of Scientific Instruments, 63(1 Pt 2A), 301-304, 19920000
  75. "Improvement of beam lifetime by Optics Modification at the Photon Factory Storage Ring"(共著), Rev. Sci. Instrum., 63(2), 1731-1735, 19920000
  76. "Global Orbit Feedback System at the Photon Factory Storage Ring"(共著), Particle Accelerators, 30, 1795, 19900000
  77. "Effects of Insertion Devices on Beam Emittances at the Photon Factory Storage Ring"(共著), Particle Accelerators, 30, 1807, 19900000
  78. "Correction of Tune Shifts and Distortions of Betatron Functions produced by the Insertion Devices at the Photon Factory Storage Ring"(共著), Particle Accelerators, 30, 1813, 19900000
  79. "Measurement of Transverse Instability Thresholds in Low and High Emittance Optics at the Photon Factory Storage Ring"(共著), Particle Accelerators, 30, 1783, 19900000
  80. "Ginga X-ray Observations of two gamma-ray burst error boxes"(共著), Astron. Astrophys., 227, 451, 19900000
  81. "Positron Beams for the PF Storage Ring"(共著), Particle Accelerators, 30, 385, 19900000
  82. "Dynamic Aperture of the Photon Factory Storage Ring"(共著), Particle Accelerators, 30, 495, 19900000
  83. "Accumulation of Positrons into the Photon Factory Storage Ring"(共著), Particle Accelerators, 30, 1777, 19900000
  84. "Beam Position Stabilization at the Photon Factory"(共著), Rev. Sci. Instrum., 60(7 Pt.2A), 1507-1512, 19890000
  85. "Construction and Poeration of the Multipole Wiggler, MPW#16 at the Photon Factory"(共著), Rev. Sci. Instru., 60(7 Pt.2A), 1855-1858, 19890000
  86. Observation of a Cosmic Gamma-ray Burst on Hakucho, AIP Conf. Proc., 115, 390-392, 19840000
  87. Coherent control in the extreme ultraviolet and attosecond regime by synchrotron radiation, Nature Communications, 10(4988), 2019,11,1
  88. Controlling the Orbital Alignment in Atoms Using Cross-Circularly Polarized Extreme Ultraviolet Wave Packets, Physical Review Letters, 123, 233401-1-5

Invited Lecture, Oral Presentation, Poster Presentation

  1. Optical vortex emitted from free electrons in nature, Masahiro Katoh, SPIE Conference 11099: Light in Nature VII, SPIE Optical Engineering + Applications, 2019/08/13, Without Invitation, English, SPIE, The international society for optics and photonics, San Diego convention center, San Diego, California United States