Multipoint Thomson scattering

Journal Article · Sat Jan 01 04:00:00 EST 1983 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1137211· OSTI ID:6898240

Levinton, F M; Navratil, G A

A new detector system for single shot measurement of electron temperature and density profiles in a magnetically confined plasma has been developed. Preliminary results have been obtained with this multipoint Thomson scattering diagnostic on Torus II, a high beta tokamak. It has a density range of 2 x 10/sup 13/ cm/sup -3/< or approx. =n/sub e/< or approx. =5 x 10/sup 14/ cm/sup -3/ in the preionization phase and 5 x 10/sup 14/ cm/sup -3/< or approx. =n/sub e/< or approx. =2 x 10/sup 15/ cm/sup -3/ in the tokamak phase. Electron temperatures range from T/sub e/>6 eV in the preionization phase to T/sub e/< or approx. =80 eV in the tokamak phase. The detector used is a multianode microchannel plate (MCP) with a 25-mm-diam multialkali photocathode. A 10 x 10 array of anodes collects the current, which has been amplified by as much as 10/sup 6/. Each anode is independent, so the MCP can be viewed as a parallel array of 100 independent photomultiplier tubes.

• Research Organization: Plasma Physics Laboratory, Columbia University, New York, New York 10027
• DOE Contract Number: AC02-76ET53016
• OSTI ID: 6898240
• Journal Information: Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 54:1; ISSN RSINA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
CLOSED PLASMA DEVICES
CONFINEMENT
DATA
DISTRIBUTION
ELECTRON DENSITY
ELECTRON MULTIPLIERS
ELECTRON TEMPERATURE
ELECTRON TUBES
EXPERIMENTAL DATA
INELASTIC SCATTERING
INFORMATION
MAGNETIC FIELDS
MICROCHANNEL ELECTRON MULTIPLIERS
NUMERICAL DATA
PLASMA DIAGNOSTICS
SCATTERING
SPATIAL DISTRIBUTION
THERMONUCLEAR DEVICES
THOMSON SCATTERING
TOKAMAK DEVICES
TORUS-II TOKAMAK