Radial profile measurements of plasma pressure-like fluctuations with the heavy ion beam diagnostic on the tokamak ISTTOK

被引：7
|
作者：
Henriques, R. B. [1 ]
Malaquias, A. [1 ]
Nedzelskiy, I. S. [1 ]
Silva, C. [1 ]
Coelho, R. [1 ]
Figueiredo, H. [1 ]
Fernandes, H. [1 ]
机构：
[1] Univ Lisbon, Inst Super Tecn, Inst Plasmas & Fusao Nucl, P-1049001 Lisbon, Portugal
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 2014年 / 85卷 / 11期
关键词：
4;
D O I：
10.1063/1.4891045
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The Heavy Ion Beam Diagnostic (HIBD) on the tokamak ISTTOK (Instituto Superior Tecnico TOKamak) has been modified, in terms of signal conditioning, to measure the local fluctuations of the n(e)sigma(1,2)(T-e) product (plasma density times the effective ionization cross-section) along the tokamak minor diameter, in 12 sample volumes in the range of - 0.7a < r < 0.7a, with a maximum delay time of 1 mu s. The corresponding signals show high correlation with the magnetic Mirnov coils in the characteristic MHD frequency range of ISTTOK plasmas and enable the identification of tearing modes. This paper describes the HIBD signal conditioning system and presents a preliminary analysis of the radial profile measurements of local n(e)sigma(1,2)(T-e) fluctuations. (C) 2014 AIP Publishing LLC.
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页数：3
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