Upgrading The 250kw Cw X-Band Klystron Used In The Goldstone Solar System Radar
2017 EIGHTEENTH INTERNATIONAL VACUUM ELECTRONICS CONFERENCE (IVEC)(2017)
摘要
The Goldstone Solar System Radar (GSSR), part of the Deep Space Network (DSN), utilizes a 70 meter antenna and a 500kW CW transmitter powered by two VKX-7864B, 250kW CW X-band (8560 MHz) klystrons. The VKX-7864B klystron, developed in 1988, required improvements in power output, bandwidth, and reliability to ensure long term system sustainability and to support demands of future DSN/GSSR critical missions. CPI reviewed klystron subassemblies historical failure modes, performed simulations with State-of-the-Art computer codes, and identified improvement opportunities. Improvements in the beam optics, RF circuits gain, bandwidth, and efficiency, collector dissipation, coolant flow, thermal stability, and mechanical reliability were implemented in a high reliability klystron upgrade, designated the VKX-7864C. All performance goals were met or exceeded. Power output > 250kW CW over entire 50 MHz bandwidth, gain > 51dB, efficiency > 45%, RF beam transmission > 99.99%. This paper presents some important improvements of this klystron development.
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关键词
Klystron, DSN/GSSR
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