Plasma Parameters in the COMPASS Divertor During Ohmic Plasmas

被引：26

作者：

Dimitrova, M. ^{[1
,3
]}

Dejarnac, R. ^{[1
]}

Popov, Tsv K. ^{[2
]}

Ivanova, P. ^{[3
]}

Vasileva, E. ^{[3
]}

Kovacic, J. ^{[4
]}

Stoeckel, J. ^{[1
]}

Havlicek, J. ^{[1
]}

Janky, F. ^{[1
]}

Panek, R. ^{[1
]}

机构：

[1] Acad Sci Czech Republic, Inst Plasma Phys, Vvi, Prague 18200 8, Czech Republic

[2] St Kl Ohridski Univ Sofia, Fac Phys, Sofia 1164, Bulgaria

[3] Bulgarian Acad Sci, Emil Djakov Inst Elect, BU-1784 Sofia, Bulgaria

[4] Jozef Stefan Inst, Ljubljana 1000, Slovenia

来源：

CONTRIBUTIONS TO PLASMA PHYSICS | 2014年 / 54卷 / 03期

关键词：

Langmuir divertor probes; EEDF; first-derivative technique; ENERGY DISTRIBUTION FUNCTION; MAGNETIC-FIELD; ELECTRON; PROBE;

D O I：

10.1002/ctpp.201410073

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：

This paper reports on probe measurements of the electron energy distribution function and plasma potential in the divertor region of the COMPASS tokamak during D-shaped plasmas. The probe data have been processed using the novel first-derivative technique. A comparison with the results obtained by processing the same data with the classical probe technique, which assumes Maxwellian electron energy distribution functions is presented and discussed. In the vicinity of the inner and outer strike points of the divertor the electron energy distribution function can be approximated by a bi-Maxwellian, with a dominating low-energy electron population (4-7 eV) and a minority of higher energy electrons (12-25 eV). In the private flux region between the two strike points the electron energy distribution function is found to be Maxwellian with temperatures in the range of 7-10 eV. The comparative analysis using both techniques has allowed a better insight into the underlying physical processes at the divertor region of the COMPASS tokamak. ((c) 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

引用

页码：255 / 260

页数：6

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