R&D Status of The C-band RF-System Development for e+e- Linear Collider in Japan.
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Accession number;99A1045377
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| Title;R&D Status of The C-band RF-System Development for e+e- Linear Collider in Japan. |
| Author;
MATSUMOTO H
(High Energy Accelerator Res. Organization(kek), Tsukuba, Jpn)
SHINTAKE T
(High Energy Accelerator Res. Organization(kek), Tsukuba, Jpn)
AKASAKA N
(High Energy Accelerator Res. Organization(kek), Tsukuba, Jpn)
YOSHIDA M
(Univ. Tokyo, Tokyo, Jpn)
TAKASU Y
(Univ. Tokyo, Tokyo, Jpn)
OHKUBO Y
(Toshiba Co., Tochigi, Jpn)
OH J S
(Pohang Accelerator Lab.(pal/postech), Pohang, Kor)
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Journal Title;Proc Symp Accel Sci Technol
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Journal Code:F0512B
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ISSN:0914-2789
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VOL.12th;NO.;PAGE.34-36(1999)
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| Figure&Table&Reference;FIG.6, TBL.1, REF.12 |
| Pub. Country;Japan |
| Language;English |
| Abstract;Hardware R&D on the C-band(5712-MHz) RF-system for the e+e- linear collider started in 1996 at KEK. We developed three 50-MW class C-band klystrons(TOSHIBA E3746 series), a smart modulator, a traveling-wave resonator(TWR), a cold model of an rf-pulse compressor cavity, and the first HOM-free accelerator structure(Choke-mode type, full-scale high power model). Life test was carried out on the developed klystrons over 6000 hours in total, where they showed highly reliable performance as high as conventional S-band klystrons. As a upgrading program to 1TeV c.m. energy scale, we have stated R&D on a new PPM klystron this year. The power consuming solenoid focusing coil will be replace by periodically arranged permanent magnets using today's advanced magnetic material of NdFeB. To achieve efficient beam focusing, the magnetic circuits will be directly integrated into the klystron. Key technologies required to the PPM klystron are under development. The electrical performance on the HOM-free accelerating structure was tested with beam at SLAC-ASSET facility in December 1998. The measured wakefield showed excellent performance on the HOM damping as exactly expected from the theory. (author abst.) |
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