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- W1487873485 abstract "Energy degradation due to back‐bombardment effect is quite serious to produce high‐brightness electron beam with long macro‐pulse with thermionic rf gun. To avoid the back‐bombardment problem, a laser photo cathode is used at many FEL facilities, but usually it costs high and not easy to operate. Thus we have studied long pulse operation of the rf gun with thermionic cathode, which is inexpensive and easy to operate compared to the photocathode rf gun. In this work, to reduce the energy degradation, we controlled input rf power amplitude by controlling pulse forming network of the power modulator for klystron. We have successfully increased the pulse duration up to 4 μs by increasing the rf power from 7.8 MW to 8.5 MW during the macro pulse." @default.
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- W1487873485 date "2007-01-01" @default.
- W1487873485 modified "2023-09-26" @default.
- W1487873485 title "Reducing Energy Degradation Due to Back-bombardment Effect with Modulated RF Input in S-band Thermionic RF Gun" @default.
- W1487873485 doi "https://doi.org/10.1063/1.2436048" @default.
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