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1.
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High Power Test for Plug-compatible STF-type Power Coupler for ILC
/ Yamamoto, Yasuchika (KEK, Tsukuba) ; Julie, Charles (CERN) ; Kako, Eiji (KEK, Tsukuba) ; Matsumoto, Toshihiro (KEK, Tsukuba) ; Michizono, Shinichiro (KEK, Tsukuba) ; Montesinos, Eric (CERN) ; Yamamoto, Akira (KEK, Tsukuba)
From the view point of plug-compatibility for the power coupler in the ILC, recommended by Linear Collider Collaboration in 2013, new STF-type power couplers with 40mm of input port diameter were re-designed, fabricated and successfully high-power-tested. Moreover, from the view point of the cost reduction for the ILC, another type of power couplers with TiN coating-free ceramic were also fabricated and high-power-tested by the collaboration between CERN and KEK. [...]
2018 - 6 p.
- Published in : 10.18429/JACoW-SRF2017-MOPB064
Fulltext: PDF;
In : 18th International Conference on RF Superconductivity, Lanzhou, China, 17 - 21 Jul 2017, pp.MOPB064
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2.
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Availability of the TiN Coating-Free Ceramic in the STF-type Power Coupler for ILC
/ Yamamoto, Yasuchika (KEK, Tsukuba) ; Irikura, Masao (TETD, Otawara) ; Ishibashi, Makoto (TETD, Otawara) ; Julie, Charles (CERN) ; Kako, Eiji (KEK, Tsukuba) ; Matsumoto, Toshihiro (KEK, Tsukuba) ; Michizono, Shinichiro (KEK, Tsukuba) ; Montesinos, Eric (CERN) ; Yamamoto, Akira (KEK, Tsukuba) ; Yasutake, Hiroto (TETD, Otawara)
In the Superconducting RF Test Facility (STF) in KEK, the research and development for the power coupler with the TiN coating-free ceramic has been done from 2014. In 2016, the high power test at the test bench was stopped due to the worse vacuum level by the unusual heating around the RF window with the TiN coating-free ceramic and the coaxial tapered section, which was caused by the enormous emission of the secondary electrons from the ceramic. [...]
2018 - 3 p.
- Published in : 10.18429/JACoW-IPAC2018-WEPML053
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.WEPML053
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3.
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STF-2 Cryomodule Performance and New Input Coupler R&D; for ILC
/ Yamamoto, Yasuchika (KEK, Tsukuba) ; Honma, Teruya (KEK, Tsukuba) ; Kako, Eiji (KEK, Tsukuba) ; Kojima, Yuuji (KEK, Tsukuba) ; Matsumoto, Toshihiro (KEK, Tsukuba) ; Michizono, Shinichiro (KEK, Tsukuba) ; Nakai, Hirotaka (KEK, Tsukuba) ; Shishido, Toshio (KEK, Tsukuba) ; Yamamoto, Akira (KEK, Tsukuba) ; Julie, Charles (CERN) et al.
The high power test for STF -2 cryomodule with twelve cavities has completed successfully in 2015. It became clear the average accelerating gradient was 30.3 MV/m, eight cavities achi eved above 31.5 MV/m as the ILC specification, and three cavities had the significant performance degradation by heavy field emission due to the additional clean room work in t he STF tunnel. [...]
SISSA, 2016 - 6 p.
- Published in : PoS ICHEP2016 (2016) 066
Fulltext: PDF; External link: PoS server
In : 38th International Conference on High Energy Physics, Chicago, IL, USA, 03 - 10 Aug 2016, pp.066
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4.
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The First Beam Recirculation and Beam Tuning in the Compact ERL at KEK
/ Sakanaka, Shogo ; Adachi, Masahiro ; Adachi, Shin-ichi ; Akemoto, Mitsuo ; Arakawa, Dai ; Asaoka, Seiji ; Enami, Kazuhiro ; Endo, Kuninori ; Fukuda, Shigeki ; Furuya, Takaaki et al.
Superconducting(SC)-linac-based light sources, which can produce ultra-brilliant photon beams in CW operation, are attracting worldwide attention. In KEK, we have been conducting R&D; efforts towards the energy-recovery-linac(ERL)-based light source* since 2006. [...]
CERN-ACC-2014-380.-
2014 - 4 p.
- Published in : (2014) , pp. TUPP075
Fulltext: tupp075 - PDF; tupp075_2 - PDF; External link: JACoW server
In : 27th Linear Accelerator Conference, Geneva, Switzerland, 31 Aug - 5 Sep 2014, pp.TUPP075
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5.
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Achievements of KEKB
/ Abe, Tetsuo (KEK, Tsukuba) ; Akai, Kazunori (KEK, Tsukuba) ; Akasaka, Norimasa (KEK, Tsukuba) ; Akemoto, Mitsuo (KEK, Tsukuba) ; Akiyama, Atsuyoshi (KEK, Tsukuba) ; Arinaga, Mitsuhiro (KEK, Tsukuba) ; Cai, Yunhai (SLAC) ; Ebihara, Kiyokazu (KEK, Tsukuba) ; Egawa, Kazumi (KEK, Tsukuba) ; Enomoto, Atsushi (KEK, Tsukuba) et al.
The machine commissioning of KEKB started in December 1998 and its operation was terminated at the end of June 2010 to upgrade KEKB to SuperKEKB. In this paper, we summarize the history of KEKB and show the achievements made there..
2013
- Published in : Prog. Theor. Exp. Phys. 2013 (2013) 03A001
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6.
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Performance of KEKB with crab cavities
/ Funakoshi, Y (KEK, Tsukuba) ; Abe, T (KEK, Tsukuba) ; Akai, K (KEK, Tsukuba) ; Akemoto, M (KEK, Tsukuba) ; Akiyama, A (KEK, Tsukuba) ; Arinaga, M (KEK, Tsukuba) ; Ebihara, K (KEK, Tsukuba) ; Egawa, K (KEK, Tsukuba) ; Enomoto, A (KEK, Tsukuba) ; Flanagan, J (KEK, Tsukuba) et al.
2008 - 5 p.
External link: Published version from JACoW
In : 11th European Particle Accelerator Conference, Genoa, Italy, 23 - 27 Jun 2008, pp.WEXG01
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7.
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Progress in R and D Efforts on the Energy Recovery Linac in Japan
/ Sakanaka, S (KEK, Tsukuba) ; Agoh, T A (KEK, Tsukuba) ; Enomoto, A (KEK, Tsukuba) ; Fukuda, S (KEK, Tsukuba) ; Furukawa, Kazuro (KEK, Tsukuba) ; Furuya, T (KEK, Tsukuba) ; Haga, K (KEK, Tsukuba) ; Hajima, R (JAEA, Ibaraki) ; Hanaki, H (Japan Synch. Radiation Res. Inst.) ; Harada, K (KEK, Tsukuba) et al.
2008 - 3 p.
External link: Published version from JACoW
In : 11th European Particle Accelerator Conference, Genoa, Italy, 23 - 27 Jun 2008, pp.MOPC061
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8.
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Cavity Diagnostic System for the Vertical Test of the STF Baseline 9-cell Cavity at KEK
/ Yamamoto, Y (KEK, Tsukuba) ; Hayano, H (KEK, Tsukuba) ; Kako, E (KEK, Tsukuba) ; Moon, S I (Pohang Accelerator Lab.) ; Noguchi, S (KEK, Tsukuba) ; Sakai, H (Tokyo U., ISSP) ; Satoh, M (KEK, Tsukuba) ; Shinoe, K (Tokyo U., ISSP) ; Shishido, T (KEK, Tsukuba) ; Umemori, K (KEK, Tsukuba) et al.
2008 - 3 p.
External link: Published version from JACoW
In : 11th European Particle Accelerator Conference, Genoa, Italy, 23 - 27 Jun 2008, pp.MOPP044
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9.
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Cryomodule Tests of the STF Baseline 9-cell Cavities at KEK
/ Kako, E (KEK, Tsukuba) ; Hayano, H (KEK, Tsukuba) ; Noguchi, S (KEK, Tsukuba) ; Ohuchi, N (KEK, Tsukuba) ; Sato, M (KEK, Tsukuba) ; Shishido, T (KEK, Tsukuba) ; Watanabe, K (KEK, Tsukuba) ; Yamamoto, Y (KEK, Tsukuba)
2008 - 3 p.
External link: Published version from JACoW
In : 11th European Particle Accelerator Conference, Genoa, Italy, 23 - 27 Jun 2008, pp.MOPP131
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10.
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The First Cool-down Tests of the 6 Meter-Long-Cryomodules for Superconducting RF Test Facility (STF) at KEK
/ Ohuchi, N (KEK, Tsukuba) ; Furuta, F (KEK, Tsukuba) ; Hara, K (KEK, Tsukuba) ; Hayano, H (KEK, Tsukuba) ; Higashi, N (KEK, Tsukuba) ; Higashi, Y (KEK, Tsukuba) ; Hisamatsu, H (KEK, Tsukuba) ; Hosoyama, K (KEK, Tsukuba) ; Kako, E (KEK, Tsukuba) ; Kojima, Y (KEK, Tsukuba) et al.
2008 - 3 p.
External link: Published version from JACoW
In : 11th European Particle Accelerator Conference, Genoa, Italy, 23 - 27 Jun 2008, pp.MOPP144
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