Fast ion millimeter wave collective Thomson scattering diagnostics on TEXTOR and ASDEX upgrades

Journal Article · Fri Oct 01 04:00:00 EDT 2004 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1779611· OSTI ID:20636707

Michelsen, S; Korsholm, S B; Bindslev, H; Meo, F; Michelsen, P K; Tsakadze, E L; Egedal, J; Woskov, P; Hoekzema, J A; Leuterer, F; Westerhof, E ^[1]

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1. Association EURATOM-Risoe National Laboratory, DK-4000 Roskilde, Denmark and MIT Plasma Science and Fusion Center, Cambridge, Massachusetts 02139 (United States)

Collective Thomson scattering (CTS) diagnostic systems for measuring fast ions in TEXTOR and ASDEX Upgrade are described in this article. Both systems use millimeter waves generated by gyrotrons as probing radiation and the scattered radiation is detected with heterodyne receivers having 40 spectral channels at TEXTOR and 50 spectral channels at ASDEX Upgrade. The antenna patterns of probe and receiver, both steerable, determine size and location of the measuring volume, and the direction of the resolved fast ion velocity. With overmoded transmission lines, consisting of waveguides and quasioptical mirrors, the antenna patterns depend on the alignment of the entire transmission line. Alignment is aided by visible laser beams relayed by small optical mirrors, inserted in the quasioptical mirrors.

• OSTI ID: 20636707
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 10 Vol. 75; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
ALPHA PARTICLES
ASDEX TOKAMAK
HETERODYNE RECEIVERS
LASER MIRRORS
LIGHT SCATTERING
MICROWAVE AMPLIFIERS
PARTICLE BEAMS
POWER TRANSMISSION LINES
TEXTOR TOKAMAK
THOMSON SCATTERING