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Abstract

To evaluate the efficiency of alpha particle heating in the DT phase of JET, it is necessary to measure the energy distribution of the fast alpha particle population. The fast ion and alpha particle diagnostic at JET will use collective Thomson scattering of high power microwave radiation to determine the alpha particle velocity distribution between their birth energy (3.5 MeV) and about 0.5 MeV with a typical spatial resolution below 0.1 m and time resolution about 0.1 s. The diagnostic uses a high power long pulse 140 GHz gyrotron as the source of probing radiation and a heterodyne receiver system to measure the spectrum of scattered radiation.

Additional information

Authors: HOEKZEMA J A, JET Joint Undertaking, Abingdon, Oxon. (GB);COSTLEY A E, JET Joint Undertaking, Abingdon, Oxon. (GB);HUGHES T P, JET Joint Undertaking, Abingdon, Oxon. (GB);STOTT P E, JET Joint Undertaking, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: JET-P(93)104 EN (1993) 20 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199410317 / Last updated on: 1994-11-28
Category: PUBLICATION
Original language: en
Available languages: en
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