Implementation of multifilter based twin-prototypes for core electron temperature measurements in the TJ-II stellarator

Journal Article · Fri Oct 15 00:00:00 EDT 2010 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.3478561· OSTI ID:22055799

Baiao, D; Varandas, C ^[1]; Medina, F; Ochando, M A ^[2]; Molinero, A; Chercoles, J ^[3]

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1. Associacao EURATOM/IST, Instituto de Plasmas e FuSao Nuclear-Laboratorio Associado, Instituto Superior Tecnico, Av. Rovisco Pais, Lisboa 1049-001 (Portugal)
2. Laboratorio Nacional de Fusion, Asociacion EURATOM-CIEMAT, Av. Complutense 22, Madrid 28040 (Spain)
3. Laboratorio General de Electronica y Automatica-CIEMAT, Av. Complutense 22, Madrid 28040 (Spain)

The design and preliminary results from a prototype of a multifilter based electron temperature diagnostic for the TJ-II stellarator are presented. The diagnostic consists of four photodiodes with filters of different thicknesses to determine the electron temperature in a wide variety of plasma compositions, thanks to the set of six different signal-pairs ratios available. The impurity transport code IONEQ, the TJ-II soft x-ray tomography, and the VUV survey diagnostics give the necessary information to assess the proposed diagnostic reliability. In parallel, a vacuum-compatible multichannel electronic board has been designed for a future linear array to determine electron temperature profiles in high-density plasmas.

• OSTI ID: 22055799
• Journal Information: Review of Scientific Instruments, Vol. 81, Issue 10; Other Information: (c) 2010 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DESIGN
ELECTRON TEMPERATURE
FAR ULTRAVIOLET RADIATION
I CODES
PHOTODIODES
PLASMA DENSITY
PLASMA DIAGNOSTICS
SOFT X RADIATION
TJ-II HELIAC
TOMOGRAPHY