Development of a Multichannel Time-of-Flight Technique for Plasma Potential Profile Measurements by Heavy Ion Beam Diagnostic on the Tokamak ISTTOK

Journal Article · Mon Apr 07 04:00:00 EDT 2008 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2917009· OSTI ID:21137018

Nedzelskiy, I S; Malaquias, A; Tashchev, Yu I; Silva, C; Figueiredo, H; Goncalves, B; Fernandes, H; Varandas, C A. F. ^[1]

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1. Associacao EURATOM/IST, Centro de Fusao Nuclear, Instituto Superior Tecnico, 1049-001 Lisboa (Portugal)

This contribution summarizes the current implementation of the time-of-flight (TOF) energy analysis for plasma potential measurements by the heavy ion beam diagnostic (HIBD) on the tokamak ISTTOK. The technique is described in detail. The results of the measurements of the ISTTOK plasma potential radial profile are presented. It is proved that the TOF energy analysis is suitable for simultaneous multichannel detection using a multiple cell array detector. With the aim of improving the signal-to-noise ratio of the diagnostic, the channeltrons have recently been installed on the 'start' and 'stop' detectors and preliminary results are discussed.

• OSTI ID: 21137018
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 996; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
HEAVY IONS
ION BEAMS
ISTTOK TOKAMAK
MASS SPECTRA
PLASMA DIAGNOSTICS
PLASMA POTENTIAL
PLASMA RADIAL PROFILES
SIGNAL-TO-NOISE RATIO
TIME-OF-FLIGHT METHOD