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High-power klystrons
Klystrons are extremely rugged tubes. Some moedels deliver large
average and continuous-wave powers with very hgh efficiency up to
65 % such as 1.300 kW SW at 350 MHz, or 600 kW CW at 3,7 GHz. Others
offer very high peak power: 45 MW for 4,5 us, or 150 MW for 1 us.
Gain is generally about 45 to 50 dB. The electron beam is focused
by an electromagnet that is often water-cooled, as are the cavities
and window th the tube itself. The collectors are usually water
cooled thanks to an efficient 2 phases (liquid and vapor) thermal
exchange technique patented by Thomson Tubes Electroniques.
An ion pump provides the ultra high vacuum needed for a long operating
life. These klystrons are used in a large number of both civil and
military facilities since they are able to present a large bandwidth,
in some cases greater than 10 % .
Multibeam klystrons (MBK) are also members of this family, they
offer higher efficiency and require a lower high-voltage power supply.
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TH 2132 Highest peak power 45 MW for 4.5 micro s.
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