A high resolution multiposition Thomson scattering system for the Rijnhuizen Tokamak Project

Journal Article · Mon Sep 01 04:00:00 EDT 1997 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1148345· OSTI ID:542353

Barth, C J; Beurskens, M N; Chu, C C; Donne, A J; Lopes Cardozo, N J; Herranz, J; v d Meiden, H J; Pijper, F J ^[1]

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1. FOM-Instituut voor Plasmafysica `Rijnhuizen`, Association EURATOM-FOM, P.O. Box 1207, 3430 BE Nieuwegein (The Netherlands)

A high resolution multiposition Thomson scattering setup to measure the electron temperature (T{sub e}) and density (n{sub e}) of a hot plasma is described. The system is operational at the Rijnhuizen Tokamak Project. Light from a high power pulsed ruby laser is scattered by the free plasma electrons and relayed to a Littrow polychromator for spectral analysis. The spectrally and spatially resolved light is detected by a GaAsP photocathode. The two-dimensional image is intensified and recorded with a charge-coupled device camera. T{sub e} in the range of 50 eV{endash}6 keV can be measured at 115 spatial elements of 2.6 mm length along the laser beam. The observation error is {lt}6{percent} at n{sub e}=2{times}10{sup 19} m{sup {minus}3} and smaller for higher n{sub e}. The high resolution and accuracy enabled the observation of small scale structures in T{sub e} and n{sub e}. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 542353
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 9 Vol. 68; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ACCURACY
CALIBRATION
ELECTRON DENSITY
ELECTRON TEMPERATURE
GALLIUM ARSENIDES
HOT PLASMA
LASER RADIATION
PHOTOCATHODES
PHOTODETECTORS
PLASMA DIAGNOSTICS
RTP TOKAMAK
THOMSON SCATTERING