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Abstract

The development of single units designed to operate at 80 kV in hydrogen, giving 60A of ions for 5-10 seconds has rested mainly on the development of multi-aperture acceleration electrodes capable of working at high voltage stress and high current density, and with significant (10- 100 watts/cm**2) power loading on their structure. Such developments have been discussed extensively and several groups have reported comparisons of different types of extraction systems. In this review we give only a brief discussion of this work, and consider some recent developments which extend the range. The transmission of these high current beams into Tokamaks depends also on the transport of such beams. We consider the theory of transport, and how it develops from the theory of single low current beams from a single aperture which composes the total multi-aperture system. This treatment of single beamlets provides insight into results obtained with the extraction systems previously studied. The discussion of multi-aperture beams is related to recent analysis of the transport of beams in the JET injectors.

Additional information

Authors: GREEN T S CULHAM LABORATORY, ABINGDON, OXON (UK), CULHAM LABORATORY, ABINGDON, OXON (UK)
Bibliographic Reference: 4TH INTERNATIONAL CONFERENCE ON ION AND PLASMA ASSISTED TECHNIQUES, KYOTO (JAPAN), SEPT. 12-16, 1983 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 31937 ORA
Availability: Can be ordered online
Record Number: 1989124027400 / Last updated on: 1987-01-01
Category: PUBLICATION
Available languages: en
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