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Measurement of fast particles in front of the ICRH-antenna of ASDEX

✍ Scribed by F. Wesner; V.M. Prozesky; R. Behrisch; G. Staudenmaier

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
296 KB
Volume
12
Category
Article
ISSN
0920-3796

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✦ Synopsis

Carbon probes were exposed in the center of the Faraday screen of the ASDEX ICRH antenna during single ICRH discharges. The subsequent analysis of the probes by ion beam techniques gave the depth, as a measure for the particle energy, and the total amount of the implanted hydrogen and deuterium. The results indicate, that during the RF fast ions hit both, the antenna surface and the wall around the torus. This can be an important reason for the production of heavy impurities by ICRH. A comparison with CX neutral fluxes shows, that these cannot explain the measured implantations.

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