Development of a Laser Timing Controller for the High Time-Resolution Nd:YAG Thomson Scattering System in Heliotron J

• KENMOCHI Naoki

  Graduate School of Energy Science, Kyoto University

• MINAMI Takashi

  Institute of Advanced Energy, Kyoto University

• ARAI Shohei

  Graduate School of Energy Science, Kyoto University

• TAKAHASHI Chihiro

  National Institute for Fusion Science

• MIZUUCHI Tohru

  Institute of Advanced Energy, Kyoto University

• KOBAYASHI Shinji

  Institute of Advanced Energy, Kyoto University

• NAGASAKI Kazunobu

  Institute of Advanced Energy, Kyoto University

• NAKAMURA Yuji

  Graduate School of Energy Science, Kyoto University

• OKADA Hiroyuki

  Institute of Advanced Energy, Kyoto University

• YAMAMOTO Satoshi

  Institute of Advanced Energy, Kyoto University

• KONOSHIMA Shigeru

  Institute of Advanced Energy, Kyoto University

• OHSHIMA Shinsuke

  Institute of Advanced Energy, Kyoto University

• MUKAI Kiyofumi

  National Institute for Fusion Science

• LEE Hyunyong

  Graduate School of Energy Science, Kyoto University

• ZANG Linge

  Graduate School of Energy Science, Kyoto University

• NAGAE Yoko

  Graduate School of Energy Science, Kyoto University

• SHA Mengyu

  Graduate School of Energy Science, Kyoto University

• OHTANI Yoshiaki

  Graduate School of Energy Science, Kyoto University

• KASAJIMA Keijun

  Graduate School of Energy Science, Kyoto University

• HARADA Tomotaka

  Graduate School of Energy Science, Kyoto University

• WATADA Hiroto

  Graduate School of Energy Science, Kyoto University

• FUKUSHIMA Hirofumi

  Graduate School of Energy Science, Kyoto University

• SUGIMOTO Yukinobu

  Graduate School of Energy Science, Kyoto University

• NAKAMURA Yuichi

  Graduate School of Energy Science, Kyoto University

• HASHIMOTO Kohei

  Graduate School of Energy Science, Kyoto University

• SANO Fumimichi

  Institute of Advanced Energy, Kyoto University

Abstract

A new laser timing controller for the high time-resolution Nd:YAG Thomson scattering system with two Nd:YAG lasers has been developed to study improved confinement physics in Heliotron J. A PIC-based timing controller synchronizes the timings of laser oscillations with plasma discharges and enables the measurement of plasma profiles with a precision of <1 μs. The timing controller is used for the “soft start” of the system, which protects the optical components against initial unstable laser oscillations. The timing controller is designed to precisely control the delay time of the laser pulse from one laser to another, and to investigate the profile change of electron temperature and density within a short time span (>80 ns), which is crucial for transport physics studies including spontaneous transitions.

Journal

• Plasma and Fusion Research

  Plasma and Fusion Research 8 (0), 2402117-2402117, 2013

  The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

• Heliotron J
• plasma diagnostic
• Nd:YAG laser Thomson scattering measurement
• electron temperature and density measurement
• improved confinement

Details

• CRID: 1390001205252852352
• NII Article ID: 130004687670
• NII Book ID: AA12346675
• DOI: 10.1585/pfr.8.2402117
• ISSN: 18806821
• HANDLE: 10655/00013457
• Web Site: https://nifs-repository.repo.nii.ac.jp/records/11535
• Web Site: https://www.jstage.jst.go.jp/article/pfr/8/0/8_2402117/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • IRDB
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed