Present Status of the Nd:YAG Thomson Scattering System Development for Time Evolution Measurement of Plasma Profile on Heliotron J

Takashi MINAMI; Shohei ARAI; Naoki KENMOCH; Hiroaki YASHIRO; Chihiro TAKAHASHI; Shinji KOBAYASHI; Tohru MIZUUCHI; Shinsuke OHSHIMA; Satoshi YAMAMOTO; Hiroyuki OKADA; Kazunobu NAGASAKI; et al

doi:10.1088/1009-0630/15/3/10

Plasma Science and Technology > 2013 > 15(3): 240-243. > DOI: 10.1088/1009-0630/15/3/10

Takashi MINAMI, Shohei ARAI, Naoki KENMOCH, Hiroaki YASHIRO, Chihiro TAKAHASHI, Shinji KOBAYASHI, Tohru MIZUUCHI, Shinsuke OHSHIMA, Satoshi YAMAMOTO, Hiroyuki OKADA, Kazunobu NAGASAKI, et al. Present Status of the Nd:YAG Thomson Scattering System Development for Time Evolution Measurement of Plasma Profile on Heliotron J[J]. Plasma Science and Technology, 2013, 15(3): 240-243. DOI: 10.1088/1009-0630/15/3/10

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Present Status of the Nd:YAG Thomson Scattering System Development for Time Evolution Measurement of Plasma Profile on Heliotron J

1 Institute of Advanced Energy, Kyoto University, Gokasho, Uji 611-0011, Japan 2 Graduate School of Energy Science, Kyoto University, Gokasho, Uji 611-0011, Japan 3 Pioneering Research Unit for Next Generation, Kyoto University, Gokasho, Uji 611-0011, Japan

Funds: supported by the Collaboration Program of the Laboratory for Complex Energy Processes, IAE, Kyoto University and the NIFS Collaborative Research Program (NIFS10KUHL030, NIFS09KUHL028, NIFS10KUHL033)

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Received Date: January 18, 2012

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Abstract

Abstract

A new high repetition rate Nd:YAG Thomson scattering system is developed for the Heliotron J helical device. A main purpose of installing the new system is the temporal evolution measurement of a plasma profile for improved confinement physics such as the edge transport barrier (H-mode) or the internal transport barrier of the helical plasma. The system has 25 spatial points with ~10 mm resolution. Two high repetition Nd:YAG lasers (> 550 mJ@ 50 Hz) realize the measurement of the time evolution of the plasma profile with ~10 ms time intervals. Scattered light is collected by a large concave mirror (D=800 mm, f/2.25) with a solid angle of ~100 mstr and transferred to interference filter polychromators by optical fiber bundles in a staircase form. The signal is amplified by newly designed fast preamplifiers with DC and AC output, which reduces the low frequency background noise. The signals are digitized with a multi-event QDC, fast gated integrators. The data acquisition is performed by a VME-based system operated by the CINOS.
- plasma diagnostic,
- Nd:YAG laser Thomson scattering measurement,
- plasma improved confinement

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[1]	Xingquan WU (伍兴权), Guosheng XU (徐国盛), Baonian WAN (万宝年), Jens Juul RASMUSSEN, Volker NAULIN, Anders Henry NIELSEN, Liang CHEN (陈良), Ran CHEN (陈冉), Ning YAN (颜宁), Linming SHAO (邵林明). A new model of the L–H transition and H-mode power threshold[J]. Plasma Science and Technology, 2018, 20(9): 94003-094003. DOI: 10.1088/2058-6272/aabb9e
[2]	Jerzy MIZERACZYK, Artur BERENDT. Introduction to investigations of the negative corona and EHD flow in gaseous two-phase fluids[J]. Plasma Science and Technology, 2018, 20(5): 54020-054020. DOI: 10.1088/2058-6272/aab602
[3]	Qiyun CHENG (程启耘), Yi YU (余羿), Shaobo GONG (龚少博), Min XU (许敏), Tao LAN (兰涛), Wei JIANG (蒋蔚), Boda YUAN (袁博达), Yifan WU (吴一帆), Lin NIE (聂林), Rui KE (柯锐), Ting LONG (龙婷), Dong GUO (郭栋), Minyou YE (叶民友), Xuru DUAN (段旭如). Optical path design of phase contrast imaging on HL-2A tokamak[J]. Plasma Science and Technology, 2017, 19(12): 125601. DOI: 10.1088/2058-6272/aa8d64
[4]	Hailin ZHAO (赵海林), Tao LAN (兰涛), Adi LIU (刘阿娣), Defeng KONG (孔德峰), Huagang SHEN (沈华刚), Jie WU (吴捷), Wandong LIU (刘万东), Changxuan YU (俞昌旋), Wei ZHANG (张炜), Guosheng XU (徐国盛), Baonian WAN (万宝年). Zonal flow energy ratio evolution during L-H and H-L transitions in EAST plasmas[J]. Plasma Science and Technology, 2017, 19(3): 35101-035101. DOI: 10.1088/2058-6272/19/3/035101
[5]	Guosheng XU (徐国盛), Xingquan WU (伍兴权). Understanding L–H transition in tokamak fusion plasmas[J]. Plasma Science and Technology, 2017, 19(3): 33001-033001. DOI: 10.1088/2058-6272/19/3/033001
[6]	LI Jun(李俊), YANG Zhoujun(杨州军), GAO Li(高丽), LIU Minghai(刘明海), ZHUANG Ge(庄革). Design of Digital Multi-Radian Phase Detector on J-TEXT[J]. Plasma Science and Technology, 2014, 16(10): 974-977. DOI: 10.1088/1009-0630/16/10/13
[7]	WU Guojiang(吴国将), ZHANG Xiaodong(张晓东). Analysis of the Variability of the L-H Transition Power Threshold in a Helium-4 Discharge[J]. Plasma Science and Technology, 2014, 16(6): 557-561. DOI: 10.1088/1009-0630/16/6/03
[8]	LIU Mingping (刘明萍), LIU Sanqiu (刘三秋), HE Jun (何俊), LIU Jie (刘杰). Electron Acceleration During the Mode Transition from Laser Wakefield to Plasma Wakefield Acceleration with a Dense-Plasma Wall[J]. Plasma Science and Technology, 2013, 15(9): 841-844. DOI: 10.1088/1009-0630/15/9/01
[9]	LIU Peng (刘鹏), XU Guosheng (徐国盛), WANG Huiqian (汪惠乾), JIANG Min (蒋敏), et al.. Reciprocating Probe Measurements of L-H Transition in LHCD H-Mode on EAST[J]. Plasma Science and Technology, 2013, 15(7): 619-622. DOI: 10.1088/1009-0630/15/7/03
[10]	WANG Qiuying (王秋颖), LI Sen(李森), GU Fan(顾璠). Mechanism of Phase Transition from Liquid to Gas under Dielectric Barrier Discharge Plasma[J]. Plasma Science and Technology, 2010, 12(5): 585-591.