Sensitivity of Thomson Scattering Measurements on Electron Distribution Modeling in Low-Density RFP Plasmas

被引：1

作者：

Fassina, A. ^{[1
]}

Bilkova, P. ^{[2
]}

Bohm, P. ^{[2
]}

Franz, P. ^{[1
]}

机构：

[1] Consorzio RFX CNR, I-35127 Padua, Italy

[2] Czech Acad Sci, Inst Plasma Phys, Prague 18200, Czech Republic

来源：

IEEE TRANSACTIONS ON PLASMA SCIENCE | 2019年 / 47卷 / 03期

关键词：

Magnetic confinement; plasma diagnostics; plasma temperature;

D O I：

10.1109/TPS.2019.2892938

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：

A numerical method which relies on Thomson scattering data for the identification and analysis of electron distributions is presented and discussed; the method is developed within the framework of Bayes probability theory. Use of this method on Reversed Field eXperiment (RFX)-mod low-density data supports the proposition that suprathermal tails cause systematic asymmetries in electron temperature profiles. In the limits of signal and spectral resolution of the diagnostic, a semiquantitative analysis is carried on; the presence of nonthermal (NT) populations is found to be consistent with runaway/slideaway plasma conditions. In low-density discharges NT e(-) presence is compatible with the presence of kinetic dynamo and can contribute to configuration sustainment.

引用

页码：1605 / 1610

页数：6

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