Search Results 1-13 of 13

  • Beam Dynamics Investigation for the Compact Seeded THz-FEL Amplifier

    Suphakul S. , Damminsek K. , Zen H. , Kii T. , Ohgaki H.

    … CoE on Sustainable Energy System (Thai-Japan), Faculty of Engineering, Rajamangala University of Technology Thanyaburi (RMUTT), ThailandA compact seeded terahertz (THz) free-electron laser (FEL) amplifier is under development at the Institute of Advanced Energy, Kyoto University. …

    Energy Procedia (89), 373-381, 2016-06

    IR 

  • Ultrafast Electron Microscopy Using Relativistic-Energy Femtosecond Electron Pulses  [in Japanese]

    Yang Jinfeng

    … In this paper, a technique of particle acceleration based radio-frequency (RF) electron gun, the generation of femtosecond electron pulses using the RF gun and the first prototype of femtosecond time-resolved relativistic-energy ultrafast electron microscopy (UEM) at Osaka University are reported. …

    KENBIKYO 50(3), 156-159, 2015

    J-STAGE 

  • Femtosecond Time-resolved Electron Microscopy  [in Japanese]

    Yang Jinfeng , Yoshida Yoichi , Shibata Hiromi

    … A new radio-frequency electron gun based ultrafast relativistic electron microscopy (UEM) has being developed in Osaka University to probe directly structural changes at the atomic scale with sub-100 fs temporal resolution in materials. … Both relativistic-energy electron diffraction and image measurements have been succeeded using a femtosecond electron beam. …

    IEEJ Transactions on Electronics, Information and Systems 134(4), 515-520, 2014

    J-STAGE 

  • Generation of Terahertz-waves using Ultrashort Electron Beams from a Photocathode Radio-frequency Gun Linac  [in Japanese]

    Kan Koichi , Yang Jinfeng , Ogata Atsushi , Kondoh Takafumi , Gohdo Masao , Shibata Hiromi , Yoshida Yoichi

    … Ultrashort, e.g., picosecond or femtosecond, electron beams are useful for electro-magnetic radiation production in terahertz (THz) range due to the inverse of 1 ps bunch length corresponding to the frequency of 1 THz. … The electron beams were generated by a photocathode radio-frequency (RF) gun linac. …

    IEEJ Transactions on Electronics, Information and Systems 134(4), 502-509, 2014

    J-STAGE 

  • Electron Microscope Sample Preparation Technology by Using Radio Frequency Glow Discharge  [in Japanese]

    MITANI Tomoaki

    Radio frequency glow discharge (rf-GD) is being used as a luminous optical device for the analysis of thin-film samples. … Observations at a in the low acceleration voltage of 1∼1.5 kV are possible recently with a scanning electron microscope (SEM) by loading feild emission gun. …

    BUNSEKI KAGAKU 57(11), 859-869, 2008-11-05

    J-STAGE  NDL Digital Collections  References (6)

  • Effect of Substrate on the Quantum Efficiency of Cesium Telluride Thin-Film Photocathodes  [in Japanese]

    SUGIYAMA Harue , KOBAYAKAWA Hisashi , TAKEDA Yoshikazu , TAKASHIMA Yoshifumi , NANIWA Ken-ich

    …   Molybdenum, in many cases, is chosen as a substrate of cesium telluride thin film photocathode for a radio frequency electron gun (RF-Gun), which shows high performance. …

    Journal of the Japan Institute of Metals and Materials 69(6), 493-496, 2005-06-20

    J-STAGE  References (7)

  • Quantum Efficiencies of Mg Photocathode under Illumination with 3rd and 4th Harmonics Nd: LiYF4 Laser Light in RF Gun.

    Nakajyo Terunobu , Yang Jinfeng , Sakai Fumio , Aoki Yasushi

    … A Mg photocathode for use in a radio-frequency gun was manufactured by a technique of hot isostatic pressing with diamond polishing and tested under a peak electric field of 57 MV/m. …

    Japanese Journal of Applied Physics 42(3), 1470-1474, 2003

    J-STAGE 

  • Development of a Photocathode for Free-Electron Lasers.  [in Japanese]

    ASAKAWA Makoto , FUJITA Masayuki , IMASAKI Kazuo , YAMANAKA Chiyoe , NAKAI Sadao

    … We developed a metallic photocathode to produce a high-brightness electron beam for freeelectron lasers. … at 1000 °C with a frequency-tripled Nd: YAG laser. … A tungsten cathode, irradiated by a frequency-doubled Nd: YAG laser, emitted photo-electrons through the two-photon process. … This tungsten photocathode is capable of generating an 1 kA/cm2 electron beam. …

    The Review of Laser Engineering 23(1), 55-67, 1995

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  • Measurement of Anisotropic Soft X-Ray Emission during Radio-Frequency Current Drive in the JFT-2M Tokamak.

    Kawashima Hisato , Hasegawa Mitsuru , Fuchs Gerhard , Matoba Tohru , Uesugi Yoshihiko , Hoshino Katsumichi , Kawakami Tomohide , Yamamoto Takumi

    … A new vertical soft X-ray pulse height analyzer (PHA) system and a tangential PHA system were used to measure the anisotropy of soft X-ray emission during lower-hybrid current drive (LHCD) and also during current drive by the combination of LHCD and electron cyclotron resonance heating (ECRH) in the JFT-2M tokamak. … The high-energy electron velocity distribution was evaluated by comparing the measured and calculated X-ray spectra. …

    Japanese Journal of Applied Physics 33(6A), 3590-3596, 1994

    J-STAGE 

  • Preparation of Superconducting Niobium Nitride Films by Molecular Beam Epitaxy Method

    Kawaguchi Kenji , Sohma Mitsugu

    … Preparation of superconducting niobium nitride (NbN) films was attempted by two kinds of electron-beam deposition methods. … The other is a reactive deposition method assisted by radio frequency plasma. …

    Japanese Journal of Applied Physics 30pt2(12B), L2088-L2090, 1991

    J-STAGE 

  • Preparation of Superconducting Niobium Nitride Films by Molecular Beam Epitaxy Method

    Kawaguchi Kenji , Sohma Mitsugu

    … Preparation of superconducting niobium nitride (NbN) films was attempted by two kinds of electron-beam deposition methods. … The other is a reactive deposition method assisted by radio frequency plasma. …

    Japanese Journal of Applied Physics 30pt2(12B), L2088-L2090, 1991

  • Research Trend on Ionized Gas in Electromagnetic Field  [in Japanese]

    Murasaki Toshimitsu , Ishimura Tsutomu , Ito Hiroshi , Nakai Takuo , Yamanaka Chiyoe , Hasegawa Akira , Morioka Shigeki , Niu Keishiro

    … Ishimura describes the problems about the experiment for getting high temperature, low density plasmas by projecting highly ionized Hydrogen with a plasma gun into a casp-magnetic field, and gives general explanations refering to the data taken in his laboratory. … Measurements of electron density in a plasma with Mach-Zehnder interferometer and other interesting methods of measurement are introduced. …

    Bulletin of the Institute of Space and Aeronautical Science, University of Tokyo 1(特), ????, 1965-10

    IR 

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