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Abstract

A reflectometer with twelve frequencies in the range 18 to 80 GHz is used on JET. This paper reports on experience in using the device to measure density profiles. In order to achieve routine and reliable operation, modifications of the hardware were necessary, and a special mode of operation (sweep/dwell) had to be developed to overcome the effects of density fluctuations. The device now produces density profiles routinely on a wide range of JET pulses. Systematic comparisons have been made with profiles measured by other diagnostics, principally LIDAR Thomson scattering and the multichannel far infrared interferometer. Details of the developments and the results of the comparisons with other diagnostics are presented.

Additional information

Authors: JET TEAM, JET Joint Undertaking, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: JET-P(92)55 EN (1992) 87 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199211277 / Last updated on: 1994-11-29
Category: PUBLICATION
Original language: en
Available languages: en