TECHNOLOGICAL PROBLEMS AND SOLUTIONS FOR THE FTU LHRH SYSTEM
The lower hybrid, electron mode, additional heating system (LHRH) for the Frascati Tokamak Upgrade (FTU), is designed to inject 8 MW, 1 sec, radiofrequency power pulses at 8 GHz into the plasma. The system is composed of eight identical modules, each one delivering 1 MW of RF power to the plasma through an antenna consiting of two 8x8 rectangular waveguide grills. Gyrotrons have been chosen as the most suitable generators to have large unit power (500 kW) and good performances in presence of high load VSWR. Technological problems arise from the RF coupling structures because of the high frequency of operation increases the complexity of the system and requires the development of small size copper-stainless steel coextruded waveguides with single ceramic window inside.
Bibliographic Reference: 14TH SOFT CONFERENCE, AVIGNON (FRANCE), SEPT. 8-12, 1986 VOL. 1, PP. 765-770 1895 P., 1986, VOL. 1 AND VOL. 2, ISBN 0 08 034935 8 WRITE TO PERGAMON PRESS, HEADINGTON HILL HALL, OXFORD, OX3 0BW (UK), PRICE: UKL 220 (FOR BOTH VOLS.)
Record Number: 1989126041901 / Last updated on: 1989-01-01
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