NDLI: 3.7 GHz 500 kW CW klystron operation at full power for SST1 LHCD system

Content Provider	IEEE Xplore Digital Library
Author	Sharma, P.K. Ambulkar, K.K. Dalakoti, S. Babu, N.R. Parmar, P.R. Virani, C.G. Thankur, A.L.
Copyright Year	2013
Description	Author affiliation: Inst. For Plasma Res., Gandhinagar, India (Sharma, P.K.; Ambulkar, K.K.; Dalakoti, S.; Babu, N.R.; Parmar, P.R.; Virani, C.G.; Thankur, A.L.)
Abstract	A 3.7 GHz, LHCD system aims to drive non inductive plasma current for SST1 machine. Its capability has been enhanced up to 2 MW by including two additional klystrons, each rated for 500kW, CW power. The additional klystrons are installed and commissioned at site, for rated power, for more than 1000 seconds, before connecting them to main LHCD system. The auxiliary systems, like supporting power supply system (magnet, filament, ion pump, etc.), active heat management system, slow and fast interlock system, transmission line pressurization system, low power rf drive system, etc. are inter-connected with klystron system through VME based data acquisition and control system for remote CW operation of klystron at rated power. The calorimetric measurements, employing Pt-100 sensors, suggests that the maximum rf power (~500kW CW) extracted from klystron is dissipated on water cooled dummy loads. The unspent DC power (~800 kW CW) is dissipated in collector which is heavily cooled with water flowing at ~1300 litres/min (lpm). The power loss in the klystron body remained within 20 kW. The cavity temperature, measured using J-type thermocouple, remained below 150°C. The output rf power, sampled through directional couplers and measured by rf detectors shows good agreement with calorimetric measurements. The detailed experimental plan along with results obtained during this campaign is presented in this paper.
Starting Page	1
Ending Page	6
File Size	604795
Page Count	6
File Format	PDF
e-ISBN	9781479901715
DOI	10.1109/SOFE.2013.6635451
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-06-10
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Klystrons Radio frequency Power supplies Temperature measurement Power measurement Detectors Directional couplers High power water cooled rf components LHCD system High power CW klystrons
Content Type	Text
Resource Type	Article

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