Z{sub eff} profile measurements from bremsstrahlung imaging in the MAST spherical tokamak

Journal Article · Mon Nov 01 00:00:00 EST 2004 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1808915· OSTI ID:20644022

Patel, A; Carolan, P G; Conway, N J; Akers, R J ^[1]

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1. EURATOM/UKAEA Fusion Association, Culham Science Centre, Abingdon, Oxfordshire, OX14 3DB (United Kingdom)

A bremsstrahlung diagnostic has been deployed on the Mega Ampere Spherical Tokamak (MAST), with matrix viewing of the full plasma cross section in a narrow region of the continuum free of spectral lines. An uncooled CCD detector is used to provide 100 Hz 128x128 matrix viewing of the plasma emissivity which is spectrally selected using an interference filter of only {approx}0.5 nm bandwidth. The apparently conflicting demands of a large field of view for the plasma and the small solid angle for narrow spectral bandwidth is accommodated in a compact lens, filter, and detector arrangement. Using measured electron temperature and density profiles the Z{sub eff} profile evolution is determined.

• OSTI ID: 20644022
• Journal Information: Review of Scientific Instruments, Vol. 75, Issue 11; Other Information: DOI: 10.1063/1.1808915; (c) 2004 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BOUNDARY LAYERS
BREMSSTRAHLUNG
CHARGE-COUPLED DEVICES
CROSS SECTIONS
ELECTRON TEMPERATURE
EMISSIVITY
ION TEMPERATURE
MAST TOKAMAK
PLASMA
PLASMA DENSITY
PLASMA DIAGNOSTICS
SPHERICAL CONFIGURATION
THERMONUCLEAR REACTORS