Development of a diagnostic technique based on Cherenkov effect for measurements of fast electrons in fusion devices

Journal Article · Wed Aug 15 00:00:00 EDT 2012 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4740512· OSTI ID:22093702

Plyusnin, V. V.; Duarte, P.; Fernandes, H.; Silva, C. ^[1]; Jakubowski, L.; Zebrowski, J.; Malinowski, K.; Rabinski, M.; Sadowski, M. J. ^[2]

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1. Association Euratom/IST, Instituto de Plasmas e Fusao Nuclear, Instituto Superior Tecnico, Universidade Tecnica de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa (Portugal)
2. National Centre for Nuclear Research (NCBJ), 7 Andrzeja Soltana Str., 05-400 Otwock (Poland)

A diagnostic technique based on the Cherenkov effect is proposed for detection and characterization of fast (super-thermal and runaway) electrons in fusion devices. The detectors of Cherenkov radiation have been specially designed for measurements in the ISTTOK tokamak. Properties of several materials have been studied to determine the most appropriate one to be used as a radiator of Cherenkov emission in the detector. This technique has enabled the detection of energetic electrons (70 keV and higher) and the determination of their spatial and temporal variations in the ISTTOK discharges. Measurement of hard x-ray emission has also been carried out in experiments for validation of the measuring capabilities of the Cherenkov-type detector and a high correlation was found between the data of both diagnostics. A reasonable agreement was found between experimental data and the results of numerical modeling of the runaway electron generation in ISTTOK.

• OSTI ID: 22093702
• Journal Information: Review of Scientific Instruments, Vol. 83, Issue 8; Other Information: (c) 2012 Euratom; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CHERENKOV COUNTERS
CHERENKOV RADIATION
CORRELATIONS
DIAGNOSTIC TECHNIQUES
EMISSION
HARD X RADIATION
ISTTOK TOKAMAK
KEV RANGE 10-100
PLASMA
PLASMA DIAGNOSTICS
RUNAWAY ELECTRONS
SIMULATION
TAIL ELECTRONS
X-RAY SOURCES