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Microwave transmission measurements in Tore Supra

Abstract

A microwave transmission diagnostic system below the electron gyrofrequency is now operating on Tore-Supra. In low density Lower-Hybrid current drive discharges the refraction effects are weak and the measurement of the wave transmission coefficient provides an estimate of the non inductive current. For higher densities, the signal is modulated by refraction effects related to sawteeth and MHD modes. In this case, more elaborated computational techniques are required in order to isolate the absorption effect from the apparent wave attenuation due to refraction. Conversely, at frequencies low enough to avoid cyclotron absorption, microwave transmission can be used as a diagnostic of sawteeth and MHD activity.
Publication Date:
Dec 31, 1991
Product Type:
Conference
Report Number:
CEA-CONF-10738; CONF-910857-
Reference Number:
SCA: 700320; PA: FRD-92:000775; SN: 92000693052
Resource Relation:
Conference: International School of Plasma Physics Piero Caldirola` diagnostics for contemporary fusion experiments,Varenna (Italy),27 Aug - 6 Sep 1991; Other Information: PBD: 1991
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; TORE SUPRA TOKAMAK; PLASMA DIAGNOSTICS; MICROWAVE RADIATION; GHZ RANGE 01-100; TRANSMISSION; SIGNAL-TO-NOISE RATIO; 700320; PLASMA DIAGNOSTIC TECHNIQUES AND INSTRUMENTATION
OSTI ID:
10131386
Research Organizations:
Association Euratom-CEA, Centre d`Etudes Nucleaires de Cadarache, 13 - Saint-Paul-lez-Durance (France). Dept. de Recherches sur la Fusion Controlee
Country of Origin:
France
Language:
English
Other Identifying Numbers:
Other: ON: DE92788494; TRN: FR9200775
Availability:
OSTI; NTIS (US Sales Only)
Submitting Site:
FRN
Size:
8 p.
Announcement Date:
Jul 04, 2005

Citation Formats

Segui, J L, and Giruzzi, G. Microwave transmission measurements in Tore Supra. France: N. p., 1991. Web.
Segui, J L, & Giruzzi, G. Microwave transmission measurements in Tore Supra. France.
Segui, J L, and Giruzzi, G. 1991. "Microwave transmission measurements in Tore Supra." France.
@misc{etde_10131386,
title = {Microwave transmission measurements in Tore Supra}
author = {Segui, J L, and Giruzzi, G}
abstractNote = {A microwave transmission diagnostic system below the electron gyrofrequency is now operating on Tore-Supra. In low density Lower-Hybrid current drive discharges the refraction effects are weak and the measurement of the wave transmission coefficient provides an estimate of the non inductive current. For higher densities, the signal is modulated by refraction effects related to sawteeth and MHD modes. In this case, more elaborated computational techniques are required in order to isolate the absorption effect from the apparent wave attenuation due to refraction. Conversely, at frequencies low enough to avoid cyclotron absorption, microwave transmission can be used as a diagnostic of sawteeth and MHD activity.}
place = {France}
year = {1991}
month = {Dec}
}