Investigation of the behavior of effective charge of Aditya tokamak plasmas

被引：7

作者：

Chowdhuri, M. B. ^{[1
]}

Manchanda, R. ^{[1
]}

Ghosh, J. ^{[1
,2
]}

Jadeja, K. A. ^{[1
]}

Patel, Kaushal M. ^{[1
]}

Kumar, Vinay ^{[1
,2
]}

Patel, Ketan M. ^{[1
]}

Atrey, P. K. ^{[1
]}

Joisa, Y. Shankara ^{[1
]}

Bhatt, S. B. ^{[1
]}

Tanna, R. L. ^{[1
]}

机构：

[1] Inst Plasma Res, Bhat 382428, Gandhinagar, India

[2] HBNI, Training Sch Complex, Mumbai 400085, Maharashtra, India

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2020年 / 62卷 / 03期

关键词：

tokamak; Z(eff); visible bremsstrahlung; Li coating; IMPURITIES; PERFORMANCE; TRANSPORT; INJECTION; PROFILES; EMISSION; Z(EFF); SYSTEM;

D O I：

10.1088/1361-6587/ab6b4a

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：

The effective charge, Z(eff), of the plasmas of the Aditya tokamak has been analyzed to understand its behavior. It has been measured through the monitoring of the visible bremsstruhlang continuum emission around 523.4 nm from the plasma using an optical fiber, interference filter and photo multiplier tube based visible spectroscopic system. It has been found that the values of Z(eff) fall in the range of 1.7-4.0 and decrease with increasing plasma electron density, n(e) and the incremental value of Z(eff) is inversely proportional to n(e)(2). The value of Z(eff) reduces in the range of 1.7-2.5 in the discharges produced after the Li coating compare to the values of 2.0-3.5 range in the discharges before the Li coating in the Aditya tokamak. Details analysis on the contribution to Z(eff) from various impurities suggests that reduction of Z(eff) after Li coating is not only due to decrease of oxygen concentration, but also other impurities, such as iron, inside the plasma.

引用

页数：7

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