Characteristics of gyrotron scattering system for. alpha. particle diagnostics in TFTR (abstract)

Journal Article · Thu Oct 01 00:00:00 EDT 1992 · Review of Scientific Instruments; (United States)

DOI:https://doi.org/10.1063/1.1143647· OSTI ID:7009110

Park, H K; Bretz, N; Ellis, R; Efthimion, P C; Marsala, R; McCarthy, M; Renda, G; Young, K M ^[1]; Cohn, D R; Machuzak, J S; Rhee, D Y; Woskov, P ^[2]

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1. Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543 (United States)
2. Massachusetts Institute of Technology, Cambridge, Massachusetts 02138 (United States)

In D-T plasmas, the understanding of the physics of confined {alpha} particles is extremely valuable for the future fusion plasma device. Among the various proposed {alpha} diagnostics, an {ital X}-mode collective Thomson scattering system employing a high-power gyrotron source ({ital P}{congruent}200 kW, {ital f}=60 GHz, pulse length {congruent}0.5 s, and modulation frequency=10--25 kHz) is being designed for TFTR. The detailed description of the gyrotron source, transmission lines, optical designs, beam and viewing dump design, and receiver system will be presented in this paper. In particular, the test results of the beam and viewing dump indicate that the stray light can be reduced by 60 dB. The background emission level ({similar to}20 eV) near 60-GHz range during high {ital Q} discharge may also be reduced with beam and viewing dump further. The optical system is designed to measure the radial profile of {alpha} particles and to orient the incident wavevector ({ital k}{sub 0}) to test the electromagnetic effects of the scattered spectrum. Prior to the study of {alpha} physics in D-T plasmas, this scattering system will be used to measure not only a bulk ion temperature but also the scattered spectrum due to fast ions produced by NB and ICRF heating in TFTR. This work was supported by the U.S. Department of Energy Contract No. DE-AC02-76-CHO-3073.

• DOE Contract Number: AC02-76CH03073
• OSTI ID: 7009110
• Journal Information: Review of Scientific Instruments; (United States), Vol. 63:10; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
PLASMA DIAGNOSTICS
MICROWAVE AMPLIFIERS
TFTR TOKAMAK
DEUTERIUM
ION TEMPERATURE
THOMSON SCATTERING
TRITIUM
AMPLIFIERS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CLOSED PLASMA DEVICES
ELECTRONIC EQUIPMENT
EQUIPMENT
HYDROGEN ISOTOPES
INELASTIC SCATTERING
ISOTOPES
LIGHT NUCLEI
MICROWAVE EQUIPMENT
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
RADIOISOTOPES
SCATTERING
STABLE ISOTOPES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
YEARS LIVING RADIOISOTOPES
700320* - Plasma Diagnostic Techniques & Instrumentation- (1992-)