| Paper |
Title |
Page |
| THP027 |
Study of PPM-Focused X-band Pulse Klystron
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628 |
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- S. Matsumoto, M. Akemoto, S. Fukuda, T. Higo, H. Honma, S. Kazakov, N. K. Kudo, H. Nakajima, T. Shidara, M. Yoshida
KEK, Ibaraki
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The R&D of PPM (Periodic Permanent Magnet)-focused X-band pulse klystrons has been conducted since 1999, originally for Global Linear Collider (GLC) project. So far six prototype tubes have been tested. Some of them successfully produce the power required in GLC (75MW, 1.6μsec pulse width). However their performance was not perfect as a GLC tube. The problems are the stability of RF output and the gun performance. Since GLC programs were terminated in 2004, some limited work on the improvement of the PPM tubes continues at X-Band Test Facility (XTF) in KEK. The work includes the test to evaluate the performance of revised (rebuilt) tubes as well as disassembling these tubes after the test for further inspection. Recent results are reported.
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| THP036 |
Long-Pulse Modulator for the Superconducting RF Test Facility at KEK
|
655 |
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- M. Akemoto, S. Fukuda, H. Honma, H. Nakajima, T. Shidara
KEK, Ibaraki
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A long-pulse modulator for the Superconducting RF Test Facility(STF) at KEK is under development now. The modulator is a direct-switched type design with a bouncer circuit to compensate the output pulse droop, and operates the klystron up to 5 MW peak power, 1.5 ms rf pulse width and up to 5 pps repetition rate. The modulator is built by improving a klystron modulator system inherited from Power Reactor and Nuclear Fuel Corp. The design and specifications of the modulator as well as R&D status for ILC modulator are described.
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