Feasibility study of direct spectra measurements for Thomson scattered signals for KSTAR fusion-grade plasmas

被引：1

作者：

Park, K. -R. ^{[1
]}

Kim, K. -H. ^{[1
]}

Kwak, S. ^{[1
,2
]}

Svensson, J. ^{[2
]}

Lee, J. ^{[3
]}

Ghim, Y. -C. ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Nucl & Quantum Engn, Daejeon, South Korea

[2] Max Planck Inst Plasma Phys, Teilinst Greifswald, Greifswald, Germany

[3] Natl Fus Res Inst, Daejeon, South Korea

来源：

JOURNAL OF INSTRUMENTATION | 2017年 / 12卷

基金：

新加坡国家研究基金会;

关键词：

Analysis and statistical methods; Data processing methods; Plasma diagnostics charged-particle spectroscopy; Spectrometers;

D O I：

10.1088/1748-0221/12/11/C11022

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Feasibility study of direct spectra measurements of Thomson scattered photons for fusion-grade plasmas is performed based on a forward model of the KSTAR Thomson scattering system. Expected spectra in the forward model are calculated based on Selden function including the relativistic polarization correction. Noise in the signal is modeled with photon noise and Gaussian electrical noise. Electron temperature and density are inferred using Bayesian probability theory. Based on bias error, full width at half maximum and entropy of posterior distributions, spectral measurements are found to be feasible. Comparisons between spectrometer-based and polychromator-based Thomson scattering systems are performed with varying quantum efficiency and electrical noise levels.

引用

页数：11