Fast Signal Modeling for Thomson Scattering Diagnostics and Effects on Electron Temperature Evaluation

被引：2

作者：

Funaba, Hisamichi ^{[1
]}

Yamada, Ichihiro ^{[1
]}

Yasuhara, Ryo ^{[1
]}

Uehara, Hiyori ^{[1
]}

Tojo, Hiroshi ^{[2
]}

Yatsuka, Eiichi ^{[2
]}

Lee, Jong-ha ^{[3
]}

Huang, Yuan ^{[4
]}

机构：

[1] Natl Inst Nat Sci, Natl Inst Fus Sci, Toki, Gifu 5095292, Japan

[2] Natl Inst Quantum Sci & Technol, Naka, Ibaraki 3110193, Japan

[3] Korea Inst Fus Energy, Daejeon 34133, South Korea

[4] Southwestern Inst Phys, POB 432, Chengdu 610041, Peoples R China

来源：

PLASMA AND FUSION RESEARCH | 2022年 / 17卷 / SpecialIssue 1期

关键词：

Thomson scattering; electron temperature; signal processing;

D O I：

10.1585/pfr.17.2402032

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

As a signal processing method for fast digitizers of the switched-capacitor-type in Thomson scattering diagnostics, a "model fitting" method is proposed. An ideal shape of the signal is estimated by this method by averaging many Thomson scattering signals. After applying this method to a relatively low density LHD plasma, the scattering of electron temperature profiles becomes small. The magnitude of error is also reduced by about 60% at some spatial channels in the core plasma. Simulations of signals with some noises based on the JT-605A Thomson scattering system enables a showing of the expected error in electron temperature. The error can be suppressed by the "model fitting" method. (C) 2022 The Japan Society of Plasma Science and Nuclear Fusion Research

引用

页数：4

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