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1.
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High-gradient breakdown studies of an X -band Compact Linear Collider prototype structure
/ Wu, Xiaowei (Tsinghua U., Beijing ; Tsinghua U., Beijing, KLPRI) ; Shi, Jiaru (Tsinghua U., Beijing ; CERN ; Tsinghua U., Beijing, KLPRI) ; Chen, Huaibi (Tsinghua U., Beijing) ; Shao, Jiahang (Tsinghua U., Beijing ; Tsinghua U., Beijing, KLPRI) ; Abe, Tetsuo (KEK, Tsukuba) ; Higo, Toshiyasu (KEK, Tsukuba) ; Matsumoto, Shuji (KEK, Tsukuba) ; Wuensch, Walter (CERN)
A Compact Linear Collider prototype traveling-wave accelerator structure fabricated at Tsinghua University was recently high-gradient tested at the High Energy Accelerator Research Organization (KEK). This X-band structure showed good high-gradient performance of up to 100 MV/m and obtained a breakdown rate of $1.27×10^{−8}$ per pulse per meter at a pulse length of 250 ns. [...]
2017 - 11 p.
- Published in : Phys. Rev. Accel. Beams 20 (2017) 052001
Fulltext: PDF;
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2.
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High Power Test of X-band Single Cell HOM-free Choke-mode Damped Accelerating Structure made by Tsinghua University
/ Wu, Xiaowei (Tsinghua U., Beijing, KLPRI ; Tsinghua U., Beijing, Dept. Eng. Phys.) ; Abe, Tetsuo (KEK, Tsukuba) ; Chen, Huaibi (Tsinghua U., Beijing, KLPRI ; Tsinghua U., Beijing, Dept. Eng. Phys.) ; Higo, Toshiyasu (KEK, Tsukuba) ; Shi, Jiaru (Tsinghua U., Beijing, KLPRI ; Tsinghua U., Beijing, Dept. Eng. Phys.) ; Wuensch, Walter (CERN) ; Zha, Hao (Tsinghua U., Beijing, KLPRI ; Tsinghua U., Beijing, Dept. Eng. Phys.)
As an alternative design for CLIC main accelerating structures, X-band choke-mode damped structures had been studied for several years. However, the performance of choke-mode cavity under high power is still in lack of research. [...]
CERN-ACC-2016-129; CLIC-Note-1105.-
2016 - 3 p.
- Published in : 10.18429/JACoW-IPAC2016-THPOR043
Published version from JACoW: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.THPOR043
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3.
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High Gradient Properties of a CLIC Prototype Accelerating Structure made by Tsinghua University
/ Wu, Xiaowei (Tsinghua U., Beijing ; Tsinghua U., Beijing, KLPRI) ; Chen, Huaibi (Tsinghua U., Beijing ; Tsinghua U., Beijing, KLPRI) ; Higo, Toshiyasu (KEK, Tsukuba) ; Matsumoto, Shuji (KEK, Tsukuba) ; Shi, Jiaru (Tsinghua U., Beijing ; Tsinghua U., Beijing, KLPRI) ; Wuensch, Walter (CERN)
A CLIC prototype structure, T24_THU_#1, was recently high-gradient tested at KEK X-band test stand, Nextef. The copper parts of this 24-cell TW structure were delivered from CERN, were bonded and brazed, bench-tested and tuned in Tsinghua University. [...]
CERN-ACC-2016-131; CLIC-Note-1104.-
2016 - 4 p.
- Published in : 10.18429/JACoW-IPAC2016-THPOR041
Published version from JACoW: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.THPOR041
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4.
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Comparison of High Gradient Performance in Varying Cavity Geometries
/ Higo, Toshiyasu (KEK, Tsukuba) ; Abe, Tetsuo (KEK, Tsukuba) ; Arakida, Yoshio (KEK, Tsukuba) ; Higashi, Yasuo (Okinawa Inst. Sci. Tech.) ; Matsumoto, Shuji (KEK, Tsukuba) ; Shidara, Tetsuo (KEK, Tsukuba) ; Takatomi, Toshikazu (KEK, Tsukuba) ; Yamanaka, Masashi (KEK, Tsukuba) ; Grudiev, Alexej (CERN) ; Riddone, Germana (CERN) et al.
Four types of CLIC prototype TW accelerator structures were high-gradient tested at Nextef, KEK, up to 100 MV/m level and the fifth is under test now. The ramping speed of each processing and the resultant breakdown rate were compared among them. [...]
2013 - 3 p.
- Published in : (2013) , pp. WEPFI018
Fulltext: PDF; External link: JACoW server
In : 4th International Particle Accelerator Conference, Shanghai, China, 12 - 17 May 2013, pp.WEPFI018
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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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Results from the CLIC X-BAND structure test program at the NLCTA
/ Adolphsen, Chris (SLAC) ; Bowden, Gordon (SLAC) ; Dolgashev, Valery (SLAC) ; Laurent, Lisa (SLAC) ; Tantawi, Sami (SLAC) ; Wang, Faya (SLAC) ; Wang, W Juwen (SLAC) ; Doebert, Steffen (CERN) ; Grudiev, Alexej (CERN) ; Riddone, Germana (CERN) et al.
As part of a SLAC-CERN-KEK collaboration on high gradient X-band structure research, several prototype structures for the CLIC linear collider study have been tested using two of the high power (300 MW) X-band rf stations in the NLCTA facility at SLAC. These structures differ in terms of their manufacturing (brazed disks and clamped quadrants), gradient profile (amount by which the gradient increases along the structure which optimizes efficiency and maximizes sustainable gradient) and HOM damping (use of slots or waveguides to rapidly dissipate dipole mode energy). [...]
CERN-OPEN-2013-033; SLAC-PUB-13697; CLIC-Note-799.-
Geneva : CERN, 2010 - 4 p.
Preprint: PDF; External link: Published version from PAC09
In : Particle Accelerator Conference 2009, Vancouver, Canada, 04 - 08 May 2009, pp.WE5PFP018
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7.
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8.
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Fabrication Technologies of the High Gradient Accelerator Structures at 100MV/m Range
/ Wang, Juwen (SLAC) ; Lewandowski, James (SLAC) ; Van Pelt, John (SLAC) ; Yoneda, Charles (SLAC) ; Gudkov, D (CERN) ; Riddone, Germana (CERN) ; Higo, Toshiyasu (KEK, Tsukuba) ; Takatomi, Toshikazu (KEK, Tsukuba)
A CERN-SLAC-KEK collaboration on high gradient X-band structure research has been established in order to demonstrate the feasibility of the CLIC baseline design for the main linac stably operating at more than 100 MV/m loaded accelerating gradient. Several prototype CLIC structures were successfully fabricated and high power tested [...]
2010
External link: Published version from JACoW
In : 1st International Particle Accelerator Conference, Kyoto, Japan, 23 - 28 May 2010, pp.THPEA064
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9.
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Advances in X-band TW Accelerator Structures Operating in the 100 MV/m Regime
/ Higo, Toshiyasu (KEK, Tsukuba) ; Higashi, Yasuo (KEK, Tsukuba) ; Matsumoto, Shuji (KEK, Tsukuba) ; Yokoyama, Kazue (KEK, Tsukuba) ; Adolphsen, Chris (SLAC) ; Dolgashev, Valery (SLAC) ; Jensen, Aaron (SLAC) ; Laurent, Lisa (SLAC) ; Tantawi, Sami (SLAC) ; Wang, Faya (SLAC) et al.
A CERN-SLAC-KEK collaboration on high gradient X-band accelerator structure development for CLIC has been ongoing for three years. The major outcome has been the demonstration of stable 100 MV/m gradient operation of a number of CLIC prototype structures [...]
2010
External link: Published version from JACoW
In : 1st International Particle Accelerator Conference, Kyoto, Japan, 23 - 28 May 2010, pp.THPEA013
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10.
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Design of 9.4 GHz 950 keV X-band Linac for Nondestructive Testing
/ Yamamoto, Tomohiko (UTNL, Ibaraki) ; Akemoto, Mitsuo (KEK, Ibaraki) ; Dobashi, Katsuhiro (The University of Tokyo, Ibaraki-ken) ; Fukuda, Shigeki (KEK, Ibaraki) ; Higo, Toshiyasu (KEK, Ibaraki) ; Natsui, Takuya (UTNL, Ibaraki) ; Tanabe, Eiji (AET Japan, Inc., Kawasaki-City) ; Uesaka, Mitsuru (UTNL, Ibaraki) ; Yoshida, Mitsuhiro (KEK, Ibaraki)
2006 - 3 p.
External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.2358
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