Central electron temperature estimations of TJ-II neutral beam injection heated plasmas based on the soft x ray multi-foil technique

被引：12

作者：

Baiao, D. ^{[1
]}

Medina, F. ^{[2
]}

Ochando, M. ^{[2
]}

McCarthy, K. ^{[2
]}

Tabares, F. ^{[2
]}

Pastor, I. ^{[2
]}

Varandas, C. ^{[1
]}

机构：

[1] Univ Tecn Lisboa, Inst Super Tecn, Inst Plasmas & Fusao Nucl, Assoc EURATOM IST, P-1049001 Lisbon, Portugal

[2] Asociac EURATOM CIEMAT, Lab Nacl Fus, Madrid 28040, Spain

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2012年 / 83卷 / 05期

关键词：

ENERGY CONFINEMENT; RADIATION;

D O I：

10.1063/1.4714340

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The core electron temperature (Te-0) of neutral beam heated plasmas is determined in TJ-II stellarator by using soft x ray detectors with beryllium filters of different thickness, based on the method known as the foil absorption technique. Te-0 estimations are done with the impurity code IONEQ, making use of complementary information from the TJ-II soft x ray tomography and the VUV survey diagnostics. When considering the actual electron density and temperature profile shapes, an acceptable agreement is found with Thomson scattering measurements for 8 different magnetic configurations. The impact of the use of both neutral beam injectors on the Te-0 measurements is addressed. Also, the behaviour of Te-0 during spontaneous profile transitions is presented. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4714340]

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