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Abstract

This paper describes a new diagnostic technique to decode information contained in the spectral and spatial distribution of photons emitted by fast neutral beam particles and provide an estimate of the 2D beam density distribution function in a cross-sectional slice. By scanning Doppler shifted H-alpha radiation from the fast beam particles at a number of peripheral locations around the beam axis, tomographic reconstructions of the beam distribution with spatial resolution DELTA-plus approximately equal to 2 cm and time resolution DELTA approximately equal to 10 ms can be made. Using a Maximum Entropy reconstruction algorithm (making no symmetry assumptions), experimental reconstructions are presented of the 2D profile of the beam produced by the prototype JET source for each of the Doppler shifted line radiation components.

Additional information

Authors: COTTRELL G A CULHAM LABORATORY, ABINGDON, OXON. (UK), CULHAM LABORATORY, ABINGDON, OXON. (UK)
Bibliographic Reference: WRITE TO THE LIBRARIAN, UKAEA CULHAM LABORATORY, ABINGDON, OXON. OX14 3DB (UK), MENTIONING REPORT CLM-P719, 1984
Record Number: 1989123047000 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en