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3. The International Linear Collider Technical Design Report - Volume 3.I: Accelerator R&D in the Technical Design Phase

Author

Adolphsen, Chris, Barone, Maura, Barish, Barry, Buesser, Karsten, Burrows, Philip, Carwardine, John, Clark, Jeffrey, Durand, Hélène Mainaud, Dugan, Gerry, Elsen, Eckhard, Enomoto, Atsushi, Foster, Brian, Fukuda, Shigeki, Gai, Wei, Gastal, Martin, Geng, Rongli, Ginsburg, Camille, Guiducci, Susanna, Harrison, Mike, Hayano, Hitoshi, Kershaw, Keith, Kubo, Kiyoshi, Kuchler, Victor, List, Benno, Liu, Wanming, Michizono, Shinichiro, Nantista, Christopher, Osborne, John, Palmer, Mark, Paterson, James McEwan, Peterson, Thomas, Phinney, Nan, Pierini, Paolo, Ross, Marc, Rubin, David, Seryi, Andrei, Sheppard, John, Solyak, Nikolay, Stapnes, Steinar, Tauchi, Toshiaki, Toge, Nobu, Walker, Nicholas, Yamamoto, Akira, and Yokoya, Kaoru

Subjects
Physics - Accelerator Physics
Abstract

The International Linear Collider Technical Design Report (TDR) describes in four volumes the physics case and the design of a 500 GeV centre-of-mass energy linear electron-positron collider based on superconducting radio-frequency technology using Niobium cavities as the accelerating structures. The accelerator can be extended to 1 TeV and also run as a Higgs factory at around 250 GeV and on the Z0 pole. A comprehensive value estimate of the accelerator is give, together with associated uncertainties. It is shown that no significant technical issues remain to be solved. Once a site is selected and the necessary site-dependent engineering is carried out, construction can begin immediately. The TDR also gives baseline documentation for two high-performance detectors that can share the ILC luminosity by being moved into and out of the beam line in a "push-pull" configuration. These detectors, ILD and SiD, are described in detail. They form the basis for a world-class experimental programme that promises to increase significantly our understanding of the fundamental processes that govern the evolution of the Universe., Comment: See also http://www.linearcollider.org/ILC/TDR . The full list of signatories is inside the Report

Published
2013

4. The International Linear Collider Technical Design Report - Volume 3.II: Accelerator Baseline Design

Author

Adolphsen, Chris, Barone, Maura, Barish, Barry, Buesser, Karsten, Burrows, Philip, Carwardine, John, Clark, Jeffrey, Durand, Hélène Mainaud, Dugan, Gerry, Elsen, Eckhard, Enomoto, Atsushi, Foster, Brian, Fukuda, Shigeki, Gai, Wei, Gastal, Martin, Geng, Rongli, Ginsburg, Camille, Guiducci, Susanna, Harrison, Mike, Hayano, Hitoshi, Kershaw, Keith, Kubo, Kiyoshi, Kuchler, Victor, List, Benno, Liu, Wanming, Michizono, Shinichiro, Nantista, Christopher, Osborne, John, Palmer, Mark, Paterson, James McEwan, Peterson, Thomas, Phinney, Nan, Pierini, Paolo, Ross, Marc, Rubin, David, Seryi, Andrei, Sheppard, John, Solyak, Nikolay, Stapnes, Steinar, Tauchi, Toshiaki, Toge, Nobu, Walker, Nicholas, Yamamoto, Akira, and Yokoya, Kaoru

Subjects
Physics - Accelerator Physics
Abstract

The International Linear Collider Technical Design Report (TDR) describes in four volumes the physics case and the design of a 500 GeV centre-of-mass energy linear electron-positron collider based on superconducting radio-frequency technology using Niobium cavities as the accelerating structures. The accelerator can be extended to 1 TeV and also run as a Higgs factory at around 250 GeV and on the Z0 pole. A comprehensive value estimate of the accelerator is give, together with associated uncertainties. It is shown that no significant technical issues remain to be solved. Once a site is selected and the necessary site-dependent engineering is carried out, construction can begin immediately. The TDR also gives baseline documentation for two high-performance detectors that can share the ILC luminosity by being moved into and out of the beam line in a "push-pull" configuration. These detectors, ILD and SiD, are described in detail. They form the basis for a world-class experimental programme that promises to increase significantly our understanding of the fundamental processes that govern the evolution of the Universe., Comment: See also http://www.linearcollider.org/ILC/TDR . The full list of signatories is inside the Report

Published
2013

5. Construction and commissioning of the compact energy-recovery linac at KEK

Author

Akemoto, Mitsuo, Arakawa, Dai, Asaoka, Seiji, Cenni, Enrico, Egi, Masato, Enami, Kazuhiro, Endo, Kuninori, Fukuda, Shigeki, Furuya, Takaaki, Haga, Kaiichi, Hajima, Ryoichi, Hara, Kazufumi, Harada, Kentaro, Honda, Tohru, Honda, Yosuke, Honma, Teruya, Hosoyama, Kenji, Kako, Eiji, Katagiri, Hiroaki, Kawata, Hiroshi, Kobayashi, Yukinori, Kojima, Yuuji, Kondou, Yoshinari, Tanaka, Olga, Kume, Tatsuya, Kuriki, Masao, Matsumura, Hiroshi, Matsushita, Hideki, Michizono, Shinichiro, Miura, Takako, Miyajima, Tsukasa, Nagahashi, Shinya, Nagai, Ryoji, Nakai, Hirotaka, Nakajima, Hiromitsu, Nakamura, Norio, Nakanishi, Kota, Nigorikawa, Kazuyuki, Nishimori, Nobuyuki, Nogami, Takashi, Noguchi, Shuichi, Obina, Takashi, Qiu, Feng, Sagehashi, Hidenori, Sakai, Hiroshi, Sakanaka, Shogo, Sasaki, Shinichi, Satoh, Kotaro, Sawamura, Masaru, Shimada, Miho, Shinoe, Kenji, Shishido, Toshio, Tadano, Mikito, Takahashi, Takeshi, Takai, Ryota, Takenaka, Tateru, Tanimoto, Yasunori, Uchiyama, Takashi, Ueda, Akira, Umemori, Kensei, Watanabe, Ken, and Yamamoto, Masahiro

Published
2018
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7. X-ray generation by inverse Compton scattering at the superconducting RF test facility

Author

Shimizu, Hirotaka, Akemoto, Mitsuo, Arai, Yasuo, Araki, Sakae, Aryshev, Alexander, Fukuda, Masafumi, Fukuda, Shigeki, Haba, Junji, Hara, Kazufumi, Hayano, Hitoshi, Higashi, Yasuo, Honda, Yosuke, Honma, Teruya, Kako, Eiji, Kojima, Yuji, Kondo, Yoshinari, Lekomtsev, Konstantin, Matsumoto, Toshihiro, Michizono, Shinichiro, Miyoshi, Toshinobu, Nakai, Hirotaka, Nakajima, Hiromitsu, Nakanishi, Kota, Noguchi, Shuichi, Okugi, Toshiyuki, Sato, Masato, Shevelev, Mikhail, Shishido, Toshio, Takenaka, Tateru, Tsuchiya, Kiyosumi, Urakawa, Junji, Watanabe, Ken, Yamaguchi, Seiya, Yamamoto, Akira, Yamamoto, Yasuchika, Sakaue, Kazuyuki, Hosoda, Seiichi, Iijima, Hokuto, Kuriki, Masao, Tanaka, Ryuta, Kuramoto, Ayaka, Omet, Mathieu, and Takeda, Ayaki

Published
2015
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12. Recent Developments and Operational Status of the Compact ERL at KEK

Author

Obina, Takashi, Adachi, Masahiro, Adachi, Shin-Ichi, Akagi, Tomoya, Akemoto, Mitsuo, Arakawa, Dai, Araki, Sakae, Asaoka, Seiji, Egi, Masato, Enami, Kazuhiro, Endo, Kuninori, Fukuda, Shigeki, Furuya, Takaaki, Haga, Kaiichi, Hajima, Ryoichi, Hara, Kazufumi, Harada, Kentaro, Honda, Tohru, Honda, Yosuke, Honma, Hiroyuki, Honma, Teruya, Hosoyama, Kenji, Hozumi, Ken-Ichi, Ishii, Atsushi, Jin, Xiuguang, Kako, Eiji, Kamiya, Yukihide, Katagiri, Hiroaki, Kato, Ryukou, Kawata, Hiroshi, Kobayashi, Yukinori, Kojima, Yuuji, Kondo, Yoshinari, Konomi, Taro, Kosuge, Atsushi, Kume, Tatsuya, Kuriki, Masao, Matsumoto, Toshihiro, Matsumura, Hiroshi, Matsushita, Hideki, Michizono, Shinichiro, Miura, Takako, Miyajima, Tsukasa, Miyauchi, Hiroshi, Mori, Michiaki, Nagahashi, Shinya, Nagai, Ryoji, Nakai, Hirotaka, Nakajima, Hiromitsu, Nakamura, Norio, Nakanishi, Kota, Nakao, Katsumi, Nigorikawa, Kazuyuki, Nishimori, Nobuyuki, Nogami, Takashi, Noguchi, Shuichi, Nozawa, Shunsuke, Ozaki, Toshiyuki, Qiu, Feng, Sagehashi, Hidenori, Sakai, Hiroshi, Sakanaka, Shogo, Sasaki, Shinichi, Satoh, Kotaro, Sawamura, Masaru, Seimiya, Yuji, Shidara, Tetsuo, Shimada, Miho, Shinoe, Kenji, Shioya, Tatsuro, Shishido, Toshio, Shizuma, Toshiyuki, Tadano, Mikito, Tahara, Toshihiro, Takahashi, Takeshi, Takai, Ryota, Takaki, Hiroyuki, Takenaka, Tateru, Tanaka, Olga, Tanimoto, Yasunori, Terunuma, Nobuhiro, Tobiyama, Makoto, Tsuchiya, Kimichika, Uchiyama, Takashi, Ueda, Akira, Umemori, Kensei, Urakawa, Junji, Watanabe, Ken, Yamamoto, Masahiro, Yamamoto, Naoto, Yamamoto, Yasuchika, Yano, Yoshiharu, and Yoshida, Mitsuhiro

Subjects
Physics::Accelerator Physics, 02 Photon Sources and Electron Accelerators, Accelerator Physics
Abstract

The Compact Energy Recovery Linac (cERL) at KEK is a test accelerator in order to develop key components to realize remarkable ERL performance as a future light source. After the beam commissioning in December 2013, the legal current limit has been increased step-by-step like 1 uA, 10 uA, and 100 uA. Survey for the source of beam losses has been conducted in each step, and the study on beam dynamics and tuning has also been carried out. As a next step, 1 mA operation is scheduled in February 2016. In parallel to the increase in beam current, a laser Compton scattering (LCS) system which can provide high-flux X-ray to a beamline has been successfully commissioned. We report recent progress in various kinds of beam tuning: improvement of electron gun performance, high bunch charge operation, mitigation of beam losses, LCS optics tuning and bunch compression for THz radiation., The 7th International Particle Accelerator Conference (IPAC2016)

Published
2016

13. Design of CEPC High Efficiency Multibeam Klystron

Author

Wang, Shengehang, primary, Fukuda, Shigeki, additional, Zhou, Zusheng, additional, Zaib, Un-Nisa, additional, Lu, Zhijun, additional, Pei, Shilun, additional, Dong, Dong, additional, Xiao, Ouzheng, additional, and Pei, Guoxi, additional

Published
2019
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14. Design Studies of Output Window for CEPC Klystron

Author

Lu, Zhijun, Chi, Yunlong, Fukuda, Shigeki, Pei, Guoxi, Pei, Shilun, Wang, Shengchang, Xiao, Ouzheng, Zaib, Un Nisa, and Zhou, Zusheng

Subjects
Technology, Accelerator Physics
Abstract

A high power and high efficiency klystron of the 650MHz, 800kW CW klystron for the Circular Electron Positron Collider (CEPC) is designed and developed at IHEP. This paper presents the design and simulation for the high power coaxial window for it. Plan of the hot test (high power testing before installing to the klystron) are also described. Simulation software of CST, ANSYS and Multipac 2.1 are used for design of window microwave structure, thermal analysis and multipacting effects. We obtained the good simulation results successively; the coaxial window S-parameter analysis, has revealed a low reflection at the operating frequency of 650 MHz. The thermal simulation shows a good temperature distribution under the cw 800kW propagation; maximum temperature has been found to be 33 °C at ceramic with water cooling in the inner and outer conductor. The multipacting at the window is possible source of the failure and it is shown that multipacting has less chance to be happened on the surface of ceramic., Proceedings of the 29\textsuperscript{th} Linear Accelerator Conf., LINAC2018, Beijing, China

Published
2018
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15. Present Status of Capacitor-charging Power Supplies for Klystron Modulators in SuperKEKB Injector Linac

Author

Kawamura, Masato, Akemoto, Mitsuo, Akikawa, Hisashi, Endo, Osamu, Fukuda, Shigeki, Honma, Hiroyuki, Michizono, Shinichiro, Nakajima, Hiromitsu, Natsui, Takuya, Sato, Kazuyuki, and Shidara, Tetsuo

Subjects
Technology, Accelerator Physics
Abstract

The capacitor-charging power supplies (CCPSs) for the klystron modulators have been developed from 2002 in the SuperKEKB injector linac. The specifications are that the output voltage is 43kV, the charging power is 30kJ/s, and the output voltage stability is 0.2%p-p. Being used in the old facility, their sizes are restricted in 480mm x 680 mm x 760mm. After various modifications, the 13 CCPSs in the linac have been operated with no fault since last October. The present status of the CCPSs, including the outlines, specifications, and the modifications against the faults, are described., Proceedings of the 29\textsuperscript{th} Linear Accelerator Conf., LINAC2018, Beijing, China

Published
2018
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16. Design and development of radio frequency output window for circular electron–positron collider klystron

Author

Lu, Zhijun, primary, Fukuda, Shigeki, additional, Zhou, Zusheng, additional, Pei, Shilun, additional, Wang, Shengchang, additional, Xiao, Ouzheng, additional, Zaib, UnNisa, additional, Bai, Bowen, additional, Pei, Guoxi, additional, Dong, Dong, additional, Zhou, Ningchuang, additional, Wang, Shaozhe, additional, and Chi, Yunlong, additional

Published
2018
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19. Progress of Delhi Light Source at IUAC, New Delhi

Author

Ghosh, Subhendu, Abhilash, Sthuthikkatt, Aryshev, Alexander, Bhandari, Rakesh, Chaudhari, Gajanan, Fukuda, Masafumi, Fukuda, Shigeki, Joshi, Vipul, Kabiraj, D., Kanjilal, Dinakar, Karmakar, Bappa, Karmakar, Joydeep, Kumar, Narender, Kumar, Sarvesh, Lehnert, Ulf, Michel, Peter, Naik, Vaishali, Pandey, Ashutosh, Patra, Padmanava, Rao, Triveni, Rodrigues, Dr. Gerard, Roy, Amit, Sahu, Bhuban, Sharma, Ashish, Terunuma, Nobuhiro, Tischer, Markus, Tripathi, Sumit, and Urakawa, Junji

Subjects
New Lasing & Status of Projects, Accelerator Physics
Abstract

The first phase of the pre-bunched FEL based on the Photoinjector RF electron gun, known as Delhi Light Source (DLS),* has been planned at Inter University Accelerator Centre (IUAC), New Delhi. The electron gun made from OFHC copper had already been fabricated and tested with low power RF at KEK, Japan. The beam optics calculation by using ASTRA, GPT codes has been performed and radiation produced from the pre-bunched electron bunches are being calculated.** The high power RF systems will be commissioned at IUAC by the beginning of 2018. The design of the laser system is being finalized and assembly/testing of the complete laser system will be started soon at KEK. The initial design of the photocathode deposition mechanism has also been completed and its procurement/development process will start shortly. The first version of the undulator magnet design has been completed and further improvements are underway.*** The initial arrangements of the DLS beam line have been worked out and various beam diagnostics components are being finalised. The production of the electron beam and THz radiation is expected by 2018 and 2019, respectively., Proceedings of the 38th Int. Free Electron Laser Conf., FEL2017, Santa Fe, NM, USA

Published
2017
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20. Design Study of RF Section and Cavities for Cepc 650 MHz Klystron

Author

Xiao, Ouzheng, Dong, Dong, Fukuda, Shigeki, Lu, Zhijun, Pei, Guoxi, Wang, Shengchang, Zaib-Un-Nisa, ., and Zhou, Zusheng

Subjects
07 Accelerator Technology, Accelerator Physics
Abstract

An 800 kW CW klystron operating at 650 MHz is de-veloped for CEPC at Institute of High Energy Physics in China. The conceptual design has been finished and the main parameters are presented in this paper. A 1D large signal disk model code, AJDISK, has been used to design and optimize klystron RF section parameters. In addition, the RF cavities have been designed using SUPERFISH, HFSS and CST., Proceedings of the 7th Int. Particle Accelerator Conf., IPAC2016, Busan, Korea

Published
2016
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21. Design Study of Electron Gun for CEPC 650 MHz Klystron

Author

Zaib-Un-Nisa, ., Dong, Dong, Fukuda, Shigeki, Lu, Zhijun, Pei, Guoxi, Wang, Shengchang, Xiao, Ouzheng, and Zhou, Zusheng

Subjects
07 Accelerator Technology, Accelerator Physics
Abstract

This paper presents the design and simulation of an electron gun for 800 kW CW klystron of which frequency is 650 MHz for CEPC project. An electron gun with a modulating anode is designed using DGUN software. The uniform beam trajectories, with a beam perveance of 0.64μA/V 3/2 are simulated. We employed a Ba-dispenser cathode of radius 35 mm with Φ10 hole at the center and obtained a current density on cathode less than 0.45 A/cm². The beam trajectories were also simulated over whole tube length with a magnetic field of 207 Gauss. Expecting functions using the modulating anode gun are also described. Proposed beam tester and whole CEPC klystron layout are also shown in this paper., Proceedings of the 7th Int. Particle Accelerator Conf., IPAC2016, Busan, Korea

Published
2016
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22. Status of Design and Development of Delhi Light Source at IUAC, Delhi

Author

Ghosh, Subhendu, Aryshev, Alexander, Bhandari, Rakesh, Chaudhari, Gajanan, Deshpande, Abhay, Fukuda, Masafumi, Fukuda, Shigeki, Joshi, Vipul, Kabiraj, D., Kanjilal, Dinakar, Karmakar, Bappa, Karmakar, Joydeep, Kumar, Narender, Naik, Vaishali, Patra, Padmanava, Rao, Triveni, Roy, Amit, Sahu, Bhuban, Sharma, Ashish, Sthuthikkatt Reghu, Abhilash, Terunuma, Nobuhiro, and Urakawa, Junji

Subjects
Physics::Accelerator Physics, 02 Photon Sources and Electron Accelerators, Accelerator Physics
Abstract

The demand for the photon beams for basic research is growing in India. To address the requirements, a project to develop a compact Light Source based on the principle of Free Electron Laser has been initiated at the Inter University Accelerator Centre (IUAC). In the first phase of the project, a normal conducting RF gun will be used to produce electron beam of energy ~ 8 MeV by using copper photocathode and subsequently by Cs2Te photocathode. A high power fiber laser with short pulse length is planned to be used to produce the pre-bunched electron beam by splitting the single laser pulse in to 16 pulses ("comb beam"). The electron beam will be injected in to a compact, variable gap undulator magnet to produce the THz radiation whose frequency can be tuned by varying the undulator field strength and the time separation of the comb beam. In the second and third phases of the project, superconducting RF gun and superconducting accelerating structure will be used to increase the energy of the electron beam up to ~ 40 MeV which will be used to produce IR radiation by using long undulator magnets and to produce X-rays by colliding the electron beam with another high power laser beam., Proceedings of the 7th Int. Particle Accelerator Conf., IPAC2016, Busan, Korea

Published
2016
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23. Design Study of Collector for CEPC 650 MHz Klystron

Author

Wang, Shengchang, Dong, Dong, Fukuda, Shigeki, Pei, Guoxi, Xiao, Ouzheng, Zaib-Un-Nisa, ., and Zhou, Zusheng

Subjects
07 Accelerator Technology, Accelerator Physics
Abstract

This paper presents the design and simulation of collector for CEPC 650 MHz high-power CW klystron. Power dissipation in collector is optimised by universal beam spread curve using EGUN code, and beam trajectory in collector is verified by Magic code. The thermal analysis is done by ANSYS-CFX, and groove number and water flow rate are optimized by fluid-solid coupled heat transfer simulation., Proceedings of the 7th Int. Particle Accelerator Conf., IPAC2016, Busan, Korea

Published
2016
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25. Present Status of the Compact ERL at KEK

Author

Nakamura, Norio, Adachi, Masahiro, Adachi, Shin-Ichi, Akemoto, Mitsuo, Arakawa, Dai, Asaoka, Seiji, Cenni, Enrico, Enami, Kazuhiro, Endo, Kuninori, Fukuda, Shigeki, Furuya, Takaaki, Haga, Kaiichi, Hajima, Ryoichi, Hara, Kazufumi, Harada, Kentaro, Honda, Tohru, Honda, Yosuke, Honma, Hiroyuki, Honma, Teruya, Hosoyama, Kenji, Hozumi, Ken-Ichi, Hwang, Ji-Gwang, Ishii, Atsushi, Kako, Eiji, Kamiya, Yukihide, Katagiri, Hiroaki, Kawata, Hiroshi, Kobayashi, Yukinori, Kojima, Yuuji, Kondou, Yoshinari, Kume, Tatsuya, Kuriki, Masao, Matsuba, Shunya, Matsumoto, Toshihiro, Matsumura, Hiroshi, Matsushita, Hideki, Michizono, Shinichiro, Miura, Takako, Miyajima, Tsukasa, Miyauchi, Hiroshi, Nagahashi, Shinya, Nagai, Ryoji, Nakai, Hirotaka, Nakajima, Hiromitsu, Nakanishi, Kota, Nakao, Katsumi, Nigorikawa, Kazuyuki, Nishimori, Nobuyuki, Nogami, Takashi, Noguchi, Shuichi, Nozawa, Shunsuke, Obina, Takashi, Ozaki, Toshiyuki, Qiu, Feng, Sagehashi, Hidenori, Sakai, Hiroshi, Sakanaka, Shogo, Sasaki, Shinichi, Satoh, Kotaro, Satoh, Masato, Sawamura, Masaru, Seimiya, Yuji, Shidara, Tetsuo, Shimada, Miho, Shinoe, Kenji, Shioya, Tatsuro, Shishido, Toshio, Shizuma, Toshiyuki, Tadano, Mikito, Tahara, Toshihiro, Takahashi, Takeshi, Takai, Ryota, Takaki, Hiroyuki, Takenaka, Tateru, Tanaka, Olga, Tanimoto, Yasunori, Tobiyama, Makoto, Tsuchiya, Kimichika, Uchiyama, Takashi, Ueda, Akira, Umemori, Kensei, Watanabe, Ken, Yamamoto, Masahiro, Yamamoto, Yasuchika, Yano, Yoshiharu, and Yoshida, Mitsuhiro

Subjects
A18 Energy Recovery Linacs (ERLs), 02 Synchrotron Light Sources and FELs, Accelerator Physics
Abstract

The Compact Energy Recovery Linac (cERL) project is ongoing at KEK in order to demonstrate excellent ERL performance as a future light source. The cERL injector was already constructed with its diagnostic beamline and successfully commissioned from April to June in 2013. In the next step, the cERL recirculation loop with a main superconducting linac and merger and dump sections has been constructed and its commissioning is scheduled to start in December 2013. Significant progress is expected by the IPAC14 conference date. In this presentation, we will describe the present status of the cERL including future developments., Proceedings of the 5th Int. Particle Accelerator Conf., IPAC2014, Dresden, Germany

Published
2014
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26. The First Beam Recirculation and Beam Tuning in the Compact ERL at KEK

Author

Sakanaka, Shogo, Adachi, Masahiro, Adachi, Shin-ichi, Akemoto, Mitsuo, Arakawa, Dai, Asaoka, Seiji, Enami, Kazuhiro, Endo, Kuninori, Fukuda, Shigeki, Furuya, Takaaki, Haga, Kaiichi, Hara, Kazufumi, Harada, Kentaro, Honda, Tohru, Honda, Yosuke, Honma, Hiroyuki, Honma, Teruya, Hosoyama, Kenji, Hozumi, Ken-ichi, Ishii, Atsushi, Jin, Xiuguang, Kako, Eiji, Kamiya, Yukihide, Katagiri, Hiroaki, Kawata, Hiroshi, Kobayashi, Yukinori, Kojima, Yuuji, Kondou, Yoshinari, Konstantinova, Olga, Kume, Tatsuya, Matsumoto, Toshihiro, Matsumura, Hiroshi, Matsushita, Hideki, Michizono, Shinichiro, Miura, Takako, Miyajima, Tsukasa, Miyauchi, Hiroshi, Nagahashi, Shinya, Nakai, Hirotaka, Nakajima, Hiromitsu, Nakamura, Norio, Nakanishi, Kota, Nakao, Katsumi, Nigorikawa, Kazuyuki, Nogami, Takashi, Noguchi, Shuichi, Nozawa, Shunsuke, Obina, Takashi, Ozaki, Toshiyuki, Qiu, Feng, Sagehashi, Hidenori, Sakai, Hiroshi, Sasaki, Shinichi, Satoh, Kotaro, Satoh, Masato, Shidara, Tetsuo, Shimada, Miho, Shinoe, Kenji, Shioya, Tatsuro, Shishido, Toshio, Tadano, Mikito, Tahara, Toshihiro, Takahashi, Takeshi, Takai, Ryota, Takaki, Hiroyuki, Takenaka, Tateru, Tanimoto, Yasunori, Tobiyama, Makoto, Tsuchiya, Kimichika, Uchiyama, Takashi, Ueda, Akira, Umemori, Kensei, Watanabe, Ken, Yamamoto, Masahiro, Yamamoto, Yasuchika, Yano, Yoshiharu, Yoshida, Mitsuhiro, Cenni, Enrico, Hajima, Ryoichi, Matsuba, Shunya, Nagai, Ryoji, Nishimori, Nobuyuki, Sawamura, Masaru, Shizuma, Toshiyuki, Hwang, Ji-Gwang, Kuriki, Masao, Seimiya, Yuji, and Valloni, Alessandra

Subjects
Accelerators and Storage Rings
Abstract

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. To demonstrate the key technologies for the ERL, we constructed the Compact ERL (cERL)** from 2009 to 2013. In the cERL, high-brightness CW electron beams are produced using a 500-kV photocathode DC gun. The beams are accelerated using SC cavities, transported through a recirculation loop, decelerated in the SC cavities, and dumped. In the February of 2014, we succeeded in accelerating and recirculating the CW beams of 4.5 micro-amperes in the cERL; the beams were successfully transported from the gun to the beam dump under energy recovery operation in the main linac. Then, precise tuning of beam optics and diagnostics of beam properties are under way. We report our experience on the beam commissioning, as well as the results of initial measurements of beam properties.

Published
2014

27. The International Linear Collider Technical Design Report

Author

Adolphsen, Chris, Barone, Maura, Barish, Barry, Buesser, Karsten, Burrows, Philip, Carwardine, John, Clark, Jeffrey, Durand, Hélène Mainaud, Dugan, Gerry, Elsen, Eckhard, Enomoto, Atsushi, Foster, Brian, Fukuda, Shigeki, Gai, Wei, Gastal, Martin, Geng, Rongli, Ginsburg, Camille, Guiducci, Susanna, Harrison, Mike, Hayano, Hitoshi, Kershaw, Keith, Kubo, Kiyoshi, Kuchler, Victor, List, Benno, Liu, Wanming, Michizono, Shinichiro, Nantista, Christopher, Osborne, John, Palmer, Mark, Paterson, James McEwan, Peterson, Thomas, Phinney, Nan, Pierini, Paolo, Ross, Marc, Rubin, David, Seryi, Andrei, Sheppard, John, Solyak, Nikolay, Stapnes, Steinar, Tauchi, Toshiaki, Toge, Nobu, Walker, Nicholas, Yamamoto, Akira, and Yokoya, Kaoru

Subjects
Physics::Accelerator Physics, High Energy Physics::Experiment, Accelerators and Storage Rings
Abstract

The International Linear Collider Technical Design Report (TDR) describes in four volumes the physics case and the design of a 500 GeV centre-of-mass energy linear electron-positron collider based on superconducting radio-frequency technology using Niobium cavities as the accelerating structures. The accelerator can be extended to 1 TeV and also run as a Higgs factory at around 250 GeV and on the Z0 pole. A comprehensive value estimate of the accelerator is give, together with associated uncertainties. It is shown that no significant technical issues remain to be solved. Once a site is selected and the necessary site-dependent engineering is carried out, construction can begin immediately. The TDR also gives baseline documentation for two high-performance detectors that can share the ILC luminosity by being moved into and out of the beam line in a "push-pull" configuration. These detectors, ILD and SiD, are described in detail. They form the basis for a world-class experimental programme that promises to increase significantly our understanding of the fundamental processes that govern the evolution of the Universe.

Published
2013

28. The Development of L-band Inductive Output Tube without Trolly toward Higher Applied Voltage

Author

Yoshida, Mitsuhiro, Asano, Hiroyuki, Fukuda, Shigeki, Kubosaki, Mitsuru, and Moriguchi, Yusuke

Subjects
07 Accelerator Technology, T08 RF Power Sources, Accelerator Physics
Abstract

The L-band inductive output tube (IOT) without trolly was developed to operate under higher applied voltage. The operation frequency of conventional IOTs is tuned using its trolly. This mechanism is based on the lower frequency IOT. However it causes less insulation voltage of the ceramics since the electric insulation oil is not available for its trolly and the length of the insulation ceramics is limited because it is a part of the resonant cavity. In case of IOTs, it is important to increase the applied voltage for higher output power since the grid gap is very narrow and its area cannot be increased to keep the gain. Thus we developed an IOT which has a longer insulating ceramic and the input cavity is filled with vacuum to use the electric insulation oil. Further the dielectric waveguide can solve to feed the input microwave to the cathode grid without trolly. These new features of the IOT is very effective for the fixed frequency application such as the accelerator, for example the energy recovery linac. The design and the experimental results will be presented in this report., Proceedings of the 1st International Particle Accelerator Conference, IPAC2010, Kyoto, Japan

Published
2010
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29. Various Observables of TW Accelerator Structures Operating 100MV/m or Higher at X-band Facility, Nextef of KEK

Author

Higo, Toshiyasu, Abe, Tetsuo, Akemoto, Mitsuo, Fukuda, Shigeki, Higashi, Norio, Higashi, Yasuo, Kudo, Noboru, Matsumoto, Shuji, Shidara, Tetsuo, Takatomi, Toshikazu, Ueno, Kenji, Watanabe, Yuichi, Yokoyama, Kazue, and Yoshida, Mitsuhiro

Subjects
07 Accelerator Technology, T06 Room Temperature RF, Accelerator Physics
Abstract

Under the CERN-SLAC-KEK collaboration, we have been developing the high gradient TW accelerator structures. One of the main focuses is the feasibility study of CLIC accelerator structure at X-band. A high power facility, Nextef*, was established at KEK in 2007. A few structures have been tested, including an un-damped disk-loaded structure successfully tested beyond 100 MV/m, a heavily damped structure to be tested from late 2009 and a structure made in a quadrant configuration. These structures follow the same accelerating-mode RF parameter profile, called CLIC-C**, but show different features at high gradient operation. Various observables, such as dark current, vacuum activities, light emission, breakdown rate, and so on, are measured. We discuss the high gradient phenomena related to these observables and the possible improvement for stable operation at a higher gradient., Proceedings of the 1st International Particle Accelerator Conference, IPAC2010, Kyoto, Japan

Published
2010
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33. 950keV, 3.95MeV and 6MeV X-band linacs for nondestructive evaluation and medicine

Author

Uesaka, Mitsuru, primary, Natsui, Takuya, additional, Lee, Kiwoo, additional, Dobashi, Katsuhiro, additional, Yamamoto, Tomohiko, additional, Fujiwara, Takeshi, additional, Zhu, Haito, additional, Demachi, Kazuyuki, additional, Tanabe, Eiji, additional, Yamamoto, Masashi, additional, Nakamura, Naoki, additional, Kusano, Joichi, additional, Higo, Toshiyasu, additional, Fukuda, Shigeki, additional, Yoshida, Mitsuhiro, additional, and Matsumoto, Shuji, additional

Published
2011
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36. Development of a Portable 950 keV X-band Linac for NDT

Author

Natsui, Takuya, primary, Uesaka, Mitsuru, additional, Yamamoto, Tomohiko, additional, Sakamoto, Fumito, additional, Hashimoto, Eiko, additional, Kiwoo, Lee, additional, Nakamura, Naoki, additional, Yamamoto, Masashi, additional, Tanabe, Eiji, additional, Yoshida, Mitsuhiro, additional, Higo, Toshiyasu, additional, Fukuda, Shigeki, additional, McDaniel, Floyd D., additional, and Doyle, Barney L., additional

Published
2009
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38. Performance of KEK-Toshiba PPM-Focused X band pulse klystrons

Author

Matsumoto, Shuji, primary, Akemoto, Mitsuo, additional, Fukuda, Shigeki, additional, Higo, Toshiyasu, additional, Honma, Hiroyuki, additional, Kazakov, Sergey, additional, Kudoh, Noboru, additional, Nakajima, Hiromitsu, additional, Shidara, Tetsuo, additional, and Yoshida, Mitsuhiro, additional

Published
2007
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40. Compact 950 keV X-band (9.4GHz) Linac X-ray Source for On-site Nondestructive Evaluation

Author

Yamamoto, Tomohiko, primary, Natsui, Takuya, additional, Yusa, Noritaka, additional, Dobashi, Katsuhiro, additional, Uesaka, Mitsuru, additional, Higo, Toshiyasu, additional, Fukuda, Shigeki, additional, Akemoto, Mitsuo, additional, Yoshida, Mitsuhiro, additional, Takatomi, Toshikazu, additional, Kudoh, Noboru, additional, Tanabe, Eiji, additional, Nakamura, Naoki, additional, Morita, Seiki, additional, and Yamamoto, Masahi, additional

Published
2007
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42. Development of C-band High-power rf Window

Author

MICHIZONO, Shinichiro, primary, MATSUMOTO, Toshihiro, additional, NAKAO, Katsumi, additional, TAKENAKA, Tateru, additional, KAKIHARA, Kazuhisa, additional, YOSHIDA, Kiyohiko, additional, and FUKUDA, Shigeki, additional

Published
2004
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43. SHINKU

Author

TAKAGI, Ken'ichi, primary, NAKAGAWA, Yukito, additional, TSUKADA, Tsutomu, additional, KANEKO, Eiji, additional, OKAMOTO, Yukio, additional, AOYAGI, Kenji, additional, KUSUNOKI, Hideki, additional, NAGASEKI, Kazuya, additional, ISHIKAWA, Itsuo, additional, SAITO, Yukinori, additional, SUGANOMATA, Shinji, additional, SASAKI, Shinya, additional, NISHIMURA, Eiichi, additional, TSUJI, Hiroshi, additional, TOMITA, Tetsuo, additional, TOYOTA, Yoshitaka, additional, GOTOH, Yasuhito, additional, ISHIKAWA, Junzo, additional, MATSUOKA, Takeru, additional, MARUYAMA, Takafumi, additional, HARADA, Kanji, additional, KISHIDA, Satoru, additional, TOKUTAKA, Heizo, additional, FUJIMURA, Kikuo, additional, KOYANAGI, Tsuyoshi, additional, FUJII, Takamitsu, additional, HATAKEYAMA, Masahiro, additional, ICIHIKI, Katsunori, additional, NAGAHAMA, Ichirota, additional, NAKAO, Masayuki, additional, HATAMURA, Yotaro, additional, KATO, Takao, additional, TANAKA, Shuji, additional, KOKAZE, Yutaka, additional, GOTOH, Tetsuji, additional, TAKAGI, Shoji, additional, KAMEYAMA, Koji, additional, SHIMADA, Shigeki, additional, ZHU, Changxin, additional, FUJIWARA, Shiro, additional, ITANI, Makoto, additional, TANAKA, Takeshi, additional, KAWABATA, Keishi, additional, KUROKAWA, Akira, additional, YOSHIHARA, Kazuhiro, additional, NAKAMURA, Ken, additional, ICHIMURA, Shingo, additional, KAWADA, Hiroki, additional, REIFF, Stefan, additional, BLOCK, Joachim H., additional, NAGAI, Yasuchika, additional, ASANO, Kiyomitsu, additional, TANAKA, Tomonari, additional, TAKEUCHI, Kyoko, additional, TUZI, Yutaka, additional, SAITO, Yoshio, additional, YOSHIMURA, Toshihiko, additional, ISHIKAWA, Yuichi, additional, ODAKA, Kenji, additional, UEDA, Shinjiro, additional, INAYOSHI, Sakae, additional, TANIUCHI, Yukiko, additional, SAITO, Kazuya, additional, MISAWA, Shunji, additional, TSUKAHARA, Sonoko, additional, SATO, Yukie, additional, MINATO, Michio, additional, ITOH, Yoshio, additional, AKAISHI, Kenya, additional, Ezaki, Kazuhiro, additional, KUBOTA, Yuseke, additional, MOTOJIMA, Osamu, additional, HASHIBA, Masao, additional, HIROHATA, Yuko, additional, HINO, Tomoaki, additional, YAMASHINA, Toshiro, additional, KOIDE, Akio, additional, CHIYODA, Hironobu, additional, MISUMI, Akira, additional, AKIMICHI, Hitoshi, additional, TAKAHASHI, Naoki, additional, ARAKAWA, Ichiro, additional, SEKINE, Shigeyuki, additional, KOKUBUN, Kiyohide, additional, SHIMIZU, Hazime, additional, IWASAKI, Akira, additional, HIRATA, Masahiro, additional, KUROKOUCHI, Satoshi, additional, WATANABE, Shu, additional, KATO, Shigeki, additional, HORIKOSHI, Gen'ichi, additional, HONDA, Hirofumi, additional, TAMURA, Shigeharu, additional, OHTANI, Kazuo, additional, KAMIJO, Nagao, additional, SUZUKI, Yoshio, additional, KIHARA, Hiroshi, additional, NAKANO, Hiroshi, additional, KAMIJO, Eiji, additional, OZAKI, Tatsuya, additional, INOUE, Narumi, additional, TOSHIMA, Shigetada, additional, KASHIWABARA, Shigeru, additional, INOKUTI, Yukio, additional, SUZUKI, Kazuhiro, additional, KOBAYASHI, Yasuhiro, additional, OHKUBO, Osamu, additional, TAKAHASHI, Nastuki, additional, SEKIGUCHI, Atsushi, additional, TOBE, Ryoki, additional, SASAKI, Masao, additional, OKADA, Osamu, additional, HOSOKAWA, Naokichi, additional, SAITO, Nobuo, additional, GOTO, Tomohiro, additional, YAMAGUCHI, Tomuo, additional, NAKAAKI, Isamu, additional, YOSHIOKA, Syoji, additional, NAKAMURA, Shigeaki, additional, KIUCHI, Masato, additional, MURAI, Kensuke, additional, CHAYAHARA, Akiyoshi, additional, KADONO, Kohei, additional, SAKAGUCHI, Toru, additional, ENSINGER, Wolfgang, additional, MOKU, Tetsuji, additional, ASAHARA, Yasuyuki, additional, OHTSUKA, Kouji, additional, OHSHIRO, Yuuji, additional, KANIE, Hisashi, additional, MURAKAMI, Hiroshi, additional, ENDO, Kazuhiro, additional, YOSHIDA, Sadafumi, additional, KUDO, Isao, additional, ICHIKAWA, Yo, additional, SETSUNE, Kentaro, additional, IZUMI, Yori, additional, OHTE, Takeo, additional, KATOH, Masaaki, additional, NEGISHI, Tuneo, additional, OHTANI, Sugio, additional, KOJIMA, Akira, additional, NISHIMURA, Okio, additional, YABE, Katsumasa, additional, KUBO, Kazuya, additional, AIHARA, Yasuki, additional, HARADA, Makoto, additional, FUJITA, Ichiro, additional, TANEMURA, Seita, additional, MIYAGAWA, Soji, additional, NIWA, Hiroaki, additional, IKEYAMA, Masami, additional, NAKAO, Setuo, additional, SAITOH, Kazuo, additional, MIYAGAWA, Yoshiko, additional, SHIOKAWA, Yoshiro, additional, ICHIKAWA, Masakazu, additional, ARAI, Takao, additional, IWASA, Yasushi, additional, ITO, Susumu, additional, KIKUCHI, Toshio, additional, KAKIHARA, Kazuhisa, additional, TOSA, Masahiro, additional, ITAKURA, Akiko, additional, KASAHARA, Akira, additional, ARAI, Masatsugu, additional, IKEDA, Shozo, additional, SUZUKI, Yutaka, additional, HOMMA, Teiichi, additional, IKEDA, Yoshinao, additional, NISHIURA, Masamitsu, additional, SATO, Masaru, additional, OISHI, Masaharu, additional, SAKUMA, Yutaka, additional, MICHIZONO, Shinichiro, additional, FUKUDA, Shigeki, additional, ANAMI, Shozo, additional, HAYASHI, Kazutaka, additional, KUSUMOTO, Yoshiro, additional, LIU, Shenjian, additional, MURATA, Masao, additional, TAKAHASHI, Seiichi, additional, HIGASHI, Kenji, additional, YOSHINO, Yukio, additional, KATAYAMA, Yuzo, additional, IGASAKI, Yasuhiro, additional, SASAKURA, Kouichi, additional, SUZUKI, Akio, additional, MATSUSHITA, Tatsuhiko, additional, SAKAMOTO, Yoshiaki, additional, WADA, Naoki, additional, OKUDA, Masahiro, additional, MORII, Hiroshi, additional, MINEOKA, Kazuhiro, additional, OKAYAMA, Hideo, additional, KONISHI, Nagayoshi, additional, KUBO, Tukasa, additional, NAGATA, Akiyoshi, additional, ISA, Hiromu, additional, HASEGAWA, Hideo, additional, YOSHIOKA, Shoji, additional, and TUJIMURA, Akira, additional

Published
1995
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46. GLC project: Linear collider for TeV physics

Author

Abe, Koya, Abe, Toshinori, Aihara, Hiroaki, Akasaka, Nobumasa, Akeroyd, Andrew G., Anami, Shozo, Arai, Yasuo, Araki, Sakae, Araya, Mamoru, Arhrib, Abdesslam, Arogancia, Dennis C., Asai, Shoji, Asakawa, Eri, Asano, Yuzo, Aso, Tsukasa, Baba, Hitoshi, Bacala, Angelina M., Bae, Saebyok, Balakin, Vladimir, Ban, Syuichi, Banerjee, Sunanda, Bhandari, Rakesh K., Bhawalkar, Dilip Devidas, Chang, Yuan-Hann, Chen, June-Rong, Cheung, Kingman, Chikamatsu, Takeshi, Chin, Yong Ho, Choi, Byung-Ho, Choi, Jinhyuk, Choi, Jong Bum, Choi, Seong-Yeol, Francois Corriveau, Delrue, Nicolas, Dobashi, Katsuhiro, Duc, Dao Vong, Endo, Ichita, Endo, Kuninori, Enomoto, Atsushi, Fang, Shouxian, Fu, Yu, Fujii, Keisuke, Fujii, Yoshiaki, Fujimoto, Daijiro, Fujimoto, Junpei, Fujiwara, Kouhei, Fukuda, Masafumi, Fukuda, Shigeki, Funahashi, Yoshisato, Furukawa, Kazuro, Furuta, Fumio, Furuya, Takaaki, Gao, Yuanning, Ghosh, Dilip K., Godbole, Rohini M., Gooc, Hermogenes Jr C., Guo, Zhi Yuan, Guoxi, Pei, Gurtu, Atul, Haba, Junji, Hagiwara, Kaoru, Hamaguchi, Koichi, Hamatsu, Ryosuke, Han, Bo Young, Han, Tao, Hara, Kazuhiko, Hara, Takanori, Hasegawa, Katsushi, Hasegawa, Takuya, Hashiguchi, Hidenori, Hashimoto, Shoji, Hashimoto, Yoshinori, Hayano, Hitoshi, Hayasaka, Takaya, Hayashii, Hisaki, He, Mao, Hemmi, Yasuo, Hidaka, Keisho, Higashi, Norio, Higashi, Yasuo, Higo, Toshiyasu, Higuchi, Masato, Hikasa, Ken-Ichi, Hinode, Fujio, Hioki, Zenro, Hirose, Tachishige, Hirose, Tomonori, Hisano, Junji, Hitomi, Nobuteru, Honda, Yousuke, Hong, Kim Shim, Hori, Michihiro, Horinaka, Hiromichi, Hoshina, Kotoyo, Hosoyama, Kenji, Hou, George W. S., Hsu, Kuotung, Huang, Chao-Shang, Huang, Hsuan-Cheng, Huang, Tao, Hui, He Duo, Hwang, Pauchy W-Y, Ichizaki, Yohei, Igi, Keiji, Iijima, Hokuto, Iijima, Toru, Ikegami, Masahiro, Ikematsu, Katsumasa, Imai, Takayuki, Inami, Takeo, Ishida, Takuya, Ishihara, Nobuhiro, Ishihara, Satoshi, Ishii, Koji, Ishii, Takehiko, Ishikawa, Tadashi, Ishino, Masaya, Ishizawa, Yoshio, Ito, Ikuo, Iwai, Go, Iwasaki, Masako, Iwashita, Yoshihisa, Iwata, Seigi, Jackson, Dave, Jagannathan, Ramaswamy, Javanmardi, Farhad, Jimbo, Masato, Jin, L. H., Jogolev, Pavel, Joshi, Satish C., Kajikawa, Ryoichi, Kajino, Fumiyoshi, Kamada, Masao, Kamada, Susumu, Kamitani, Takuya, Kamiya, Yoshio, Kamiya, Yousuke, Kamiya, Yukihide, Kamiyama, Takashi, Kamoshita, Jun-Chi, Kaneko, Toshiaki, Kanemura, Shinya, Kang, Joo Hwan, Kang, Joo Sang, Kanzaki, Jun-Ichi, Karataev, Pavel, Karita, Yukio, Kasai, Tadashi, Kashiwagi, Shigeru, Kato, Kiyoshi, Kato, Shigeki, Kato, Yukihiro, Katoh, Tadahiko, Katou, Yoshiaki, Kawabata, Setsuya, Kawagoe, Kiyotomo, Kawai, Hideyuki, Kawamoto, Tatsuo, Kazakov, Sergei, Khalatyan, Norik, Khan, Sameen Ahmed, Khiem, Le Hong, Kikuchi, Mitsuo, Kim, Choong Sun, Kim, Eun-San, Kim, Hong Joo, Kim, Hyunwoo, Kim, K. W., Kim, M. G., Kim, Shinhong, Kim, Sun Kee, Kimura, Yoshitaka, Kitano, Ryuichiro, Kitazawa, Yoshihisa, Kiyo, Yuichiro, Kiyoura, Shingo, Ko, Pyungwon, Kobayakawa, Hisashi, Kobayashi, Katsuyuki, Kobayashi, Makoto, Kodaira, Jiro, Koike, Shigeaki, Koiso, Haruyo, Koizumi, Susumu, Komamiya, Sachio, Komatsubara, Takeshi, Komine, Shinji, Kon, Tadashi, Kondo, Kenjiro, Kuang, Yu Ping, Kubo, Kiyoshi, Kuboshima, Rie, Kudoh, Noboru, Kumada, Masayuki, Kumano, Satoshi, Kume, Tatsuya, Kumita, Tetsuro, Kuno, Yoshitaka, Kurashige, Hisaya, Kurata, Masakazu, Kurihara, Yoshimasa, Kuriki, Masao, Kuroda, Masaaki, Kuroda, Ryunosuke, Kuroda, Shigeru, Kuroiwa, Hirotoshi, Kurokawa, Shin-Ichi, Kuwahara, Makoto, Kwon, Young Joon, Lai, C. H., Lai, Hung-Liang, Larionov, Alexei, Lee, Jae Sik, Lee, Jungil, Lee, Kang Young, Lee, Su Kyoung, Lee, Tae-Yeon, Li, Chong-Sheng, Li, Hsiang-Nan, Liao, Yi, Lin, Chih-Hsun, Lin, Guey-Lin, Lin, Willis T., Lin, Zhi-Hai, Long, Hoang N., Lu, Hong-Liang, Lunin, Andrei, Luo, Minxing, Luo, Xiaoan, Ma, Bo-Qiang, Ma, Wen-Gan, Maeno, Tadashi, Magallanes, Jingle B., Maki, Akihiro, Masaike, Akira, Mashimo, Tetsuro, Masuyama, Atsuhiko, Masuzawa, Mika, Matsuda, Takeshi, Matsui, Takayuki, Matsukado, Koji, Matsumoto, Hiroshi, Matsumoto, Shuji, Matsunaga, Hiroyuki, Matsushita, Takashi, Matsuyama, Tetsuya, Michizono, Shinichiro, Mihara, Satoshi, Minh, Tran Thanh, Mitsuhashi, Toshiya, Miyabayashi, Kenkichi, Miyamoto, Akiya, Miyamoto, Masaharu, Miyano, Kazumasa, Miyata, Hitoshi, Mizuno, Hajime, Mizuno, Ryu, Mori, Toshinori, Moroi, Takeo, Morozumi, Takuya, Morozumi, Yuichi, Munehisa, Tomo, Murayama, Hitoshi, Muto, Masafumi, Muto, Toshiya, Nagamine, Tadashi, Nagashima, Yorikiyo, Naito, Takashi, Nakai, Koji, Nakajima, Kazuhisa, Nakajima, Noriko, Nakamura, Isamu, Nakamura, Miwako, Nakamura, Shogo, Nakanishi, Tsutomu, Nakano, Eiichi, Nakata, Yuichi, Nakayama, Hisayoshi, Nakazawa, Nobuya, Namito, Yoshihito, Namkung, Won, Naumenko, Gennady, Nguyen, Anh Ky, Nguyen, Do, Ninomiya, Masao, Nishiguchi, Hajime, Nishikawa, Koichiro, Nishitani, Tomohiro, Nitoh, Osamu, Niwa, Koyu, Nojiri, Mihoko, Nomura, Daisuke, Nozaki, Mituaki, Odagiri, Jun-Ichi, Odagiri, Kosuke, Odaka, Shigeru, Ogawa, Yujiro, Oh, Jong-Seok, Oh, Sejong, Oh, Sunkun, Ohama, Taro, Ohgaki, Tomomi, Ohkuma, Kazumasa, Ohsawa, Satoshi, Ohshima, Takayoshi, Ohta, Shigemi, Ohya, Keiji, Oide, Katsunobu, Okada, Yasuhiro, Okugi, Toshiyuki, Okumi, Shoji, Okuno, Hideki, Okusawa, Tohru, Omori, Tsunehiko, Onishi, Yukiyoshi, Ono, Hiroaki, Ootani, Wataru, Orito, Shuji, Ozaki, Toshiyuki, Ozone, Kenji, Pairsuwan, Weerapong, Park, Chul-Hi, Park, Hwan-Bae, Park, Il Hung, Park, Seong Chan, Perret-Gallix, Denis, Potylitsyn, Alexandere, Qing, Qin, Rindani, Saurabh D., Roy, Amit, Roy, Probir, Saito, Kotaro, Saito, Yoshio, Sakai, Hiroshi, Sakai, Izumi, Sakamoto, Yutaka, Sakanaka, Shogo, Sanchez, Allister Levi C., Sanda, Ichiro, Sanuki, Tomoyuki, Sasaki, Ken, Sasao, Noboru, Sekiguchi, Katsumi, Senaha, Eibun, Sendai, Hiroshi, Sezaki, Tadashi, Shang, Renchang, Shen, Xiaoyan, Shidara, Tetsuo, Shimizu, Yasuhiro, Shimizu, Yoshimitsu, Shintake, Tsumoru, Shioden, Masaomi, Shirakabe, Yoshihisa, Sirai, Miyuki, Solidum, Ruelson S., Son, Dongchul, Song, Jeonghyeon, Stefanov, Konstantin, Sugahara, Ryuhei, Sugamoto, Akio, Sugawara, Hirotaka, Sugimoto, Shojiro, Sugimoto, Yasuhiro, Sugiyama, Akira, Sugiyama, Harue, Sumi, Yoshio, Sumino, Yukinari, Suzuki, Chihiro, Suzuki, Shiro, Suzuki, Toshikazu, Takahashi, Chikako, Takahashi, Shinya, Takahashi, Tamotsu, Takahashi, Tohru, Takano, Mikio, Takasaki, Eichi, Takasaki, Fumihiko, Takashima, Yoshifumi, Takasu, Yuko, Takata, Koji, Takatomi, Toshazu, Takayama, Hiroya, Takayanagi, Yuichi, Takeda, Hiroshi, Takeda, Seishi, Takeda, Shigeru, Takeshita, Tohru, Takeuchi, Yasunori, Takikawa, Koji, Tamura, Fumihiko, Tamura, Norio, Tanabe, Kenji, Tanaka, Hidekazu, Tanaka, Junichi, Tanaka, Kazuhiro, Tanaka, Manobu, Tanaka, Minoru, Tanaka, Reisaburo, Tanaka, Senku, Tauchi, Toshiaki, Tawada, Masafumi, Tejima, Masami, Teramoto, Yoshiki, Terazawa, Hidezumi, Terunuma, Nobuhiro, Teryaev, Vladimir, Tobimatsu, Keijiro, Togawa, Kazuaki, Toge, Nobukazu, Tokumoto, Shuichi, Tong, Guoling, Toomi, Nobuko, Totsuka, Yoji, Tovey, Stuart N., Tseng, Jie-Jun, Tsuchiya, Kiyosumi, Tsukamoto, Toshifumi, Tsukamoto, Toshio, Tsutsui, Hiroshi, Uehara, Yosuke, Ueno, Koji, Uesaka, Misturu, Umeda, Yoshiaki, Uozumi, Satoru, Urakawa, Junji, Usiroda, Yutaka, Vicente, Ian Ceasar M., Vogel, Vladimir, Wada, Kenji, Wada, Koji, Wang, Jian-Xiong, Wang, Jiu Qing, Wang, Minzu, Wang, Qing, Washio, Masakazu, Watanabe, Isamu, Watanabe, Osamu, Watanabe, Takashi, Watanabe, Yuichi, White, John W., Won, Eunil, Wu, Yue-Liang, Xiaoan, Luo, Yamada, Sakue, Yamada, Youichi, Yamaguchi, Akira, Yamaguchi, Masahiro, Yamaguchi, Seiya, Yamaki, Tetsuji, Yamamoto, Hitoshi, Yamamoto, Masahiro, Yamamoto, Naoto, Yamamoto, Noboru, Yamamoto, Yasuchika, Yamamura, Taiki, Yamanaka, Taku, Yamaoka, Hiroshi, Yamashita, Satoru, Yamauchi, Masanori, Yamazaki, Yoshishige, Yang, Hey Young, Yang, Jin Min, Yang, Jong Mann, Yano, Yoshiharu, Yasui, Yoshiaki, Yeh, G. P., Yokoya, Kaoru, Yoshida, Mitsuhiro, Yoshida, Tetsuya, Yoshioka, Arifumi, Yoshioka, Masakazu, Yu, Geumbong, Yuan, C. -P, Yuasa, Fukuko, Zhang, Chuang, Zhang, De-Hong, Zhang, Xinmin, Zhang, Xueyao, Zhao, Ding Da, Zhao, Zheng-Guo, Zhou, Hong-Yi, Zhu, Shou-Hua, and Zhu, Yong-Sheng

47. The International Linear Collider Technical Design Report - Volume 3.I: Accelerator \& in the Technical Design Phase

Author

Adolphsen, Chris, Barone, Maura, Barish, Barry, Buesser, Karsten, Burrows, Philip, Carwardine, John, Clark, Jeffrey, Mainaud Durand, Hélène, Dugan, Gerry, Elsen, Eckhard, Enomoto, Atsushi, Foster, Brian, Fukuda, Shigeki, Gai, Wei, Gastal, Martin, Geng, Rongli, Ginsburg, Camille, Guiducci, Susanna, Harrison, Mike, Hayano, Hitoshi, Kershaw, Keith, Kubo, Kiyoshi, Kuchler, Victor, List, Benno, Liu, Wanming, Michizono, Shinichiro, Nantista, Christopher, Osborne, John, Palmer, Mark, Paterson, James Mcewan, Peterson, Thomas, Phinney, Nan, Pierini, Paolo, Marc Ross, Rubin, David, Seryi, Andrei, Sheppard, John, Solyak, Nikolay, Stapnes, Steinar, Tauchi, Toshiaki, Toge, Nobu, Walker, Nicholas, Yamamoto, Akira, and Yokoya, Kaoru

48. Long-pulse modulator development for the superconducting RF Test Facility (STF) At KEK

Author

Akemoto, Mitsuo, Fukuda, Shigeki, Honma, Hiroyuki, Nakajima, Hiromitsu, and Shidara, Tetsuo

Subjects
T16 Pulsed Power Technology, 07 Accelerator Technology, Accelerator Physics
Abstract

This paper describes a long-pulse 1.3 GHz klystron modulator that was recently developed for the Superconducting RF Test Facility (STF) at High Energy Accelerator Research Organization (KEK). The modulators is a direct-switched-type design with a 1:15 step-up transformer and a bouncer circuit to compensate for the output pulse droop within ±0.5%; it can drive a klystron with up to 10 MW peak power, 1.5 ms rf pulse width, and up to 5 pps repetition rate. The main features of this modulator are the use of four 50 kW switching power supplies in parallel to charge the storage capacitors to 10 kV, self-healing-type capacitor to realize a compact storage capacitor bank, and a highly reliable IGBT switch which enables elimination of a crowbar circuit. Design considerations and its performance are presented. An IEGT (Injection Enhanced Gate Transistor) switch, composed of six series devices with a rating of 4.5 kV and 2100 A-DC, has been also developed and tested for R to realize a compact modulator., Proceedings of the 1st International Particle Accelerator Conference, IPAC2010, Kyoto, Japan

49. The linac upgrade plan for SuperKEKB

Author

Sugimura, Takashi, Akemoto, Mitsuo, Arakawa, Dai, Enomoto, Atsushi, Fukuda, Shigeki, Furukawa, Kazuro, Higo, Toshiyasu, Honma, Hiroyuki, Ikeda, Mitsuo, Kadokura, Eiichi, Kakihara, Kazuhisa, Kamitani, Takuya, Katagiri, Hiroaki, Kurashina, Miho, Matsumoto, Shuji, Matsumoto, Toshihiro, Matsushita, Hideki, Michizono, Shinichiro, Mikawa, Katsuhiko, Miura, Takako, Nakajima, Hiromitsu, Nakao, Katsumi, Ogawa, Yujiro, Ohsawa, Satoshi, Satoh, Masanori, Shidara, Tetsuo, Shirakawa, Akihiro, Suwada, Tsuyoshi, Takenaka, Tateru, Yano, Yoshiharu, Yokoyama, Kazue, and Yoshida, Mitsuhiro

Subjects
03 Linear Colliders, Lepton Accelerators and New Acceleration Techniques, Physics::Accelerator Physics, High Energy Physics::Experiment, A08 Linear Accelerators, Accelerator Physics
Abstract

The next generation B-factory ¿SuperKEKB¿ project whose target luminosity is 8 ×10³⁵ cm⁻²s⁻¹ is under consideration. A ¿nano-beam scheme¿ is introduced to the SuperKEKB. In the scheme, an electron beam (Energy = 7 GeV, Charge = 3-4 nC/bunch, Vertical emittance =2.8 x 10⁻⁵ m) and a positron beam (Energy = 4 GeV, Charge = 4 nC/bunch, Vertical emittance = 1.6 x 10⁻⁵ m), are required at the end of injector linac. They are quite challenging targets for the present linac. In order to meet the requirements, we will introduce some new components to the linac. They are a photo-cathode RF gun for an electron beam, a positron capture section using new L-band cavities, a newly designed positron-generation target system and a damping ring for a positron beam. This presentation shows a strategy of our injector upgrade., Proceedings of the 1st International Particle Accelerator Conference, IPAC2010, Kyoto, Japan

50. SuperKEKB positron source construction status

Author

Kamitani, Takuya, Akemoto, Mitsuo, Arakawa, Dai, Arakida, Yoshio, Enomoto, Atsushi, Fukuda, Shigeki, Funakoshi, Yoshihiro, Furukawa, Kazuro, Higo, Toshiyasu, Honma, Hiroyuki, Iida, Naoko, Ikeda, Mitsuo, Kadokura, Eiichi, Kaji, Hiroshi, Kakihara, Kazuhisa, Katagiri, Hiroaki, Kikuchi, Mitsuo, Koiso, Haruyo, Kurashina, Miho, Matsumoto, Shuji, Matsumoto, Toshihiro, Matsushita, Hideki, Michizono, Shinichiro, Mikawa, Katsuhiko, Mimashi, Toshihiro, Miura, Takako, Miyahara, Fusashi, Mori, Takashi, Morita, Akio, Nakajima, Hiromitsu, Nakao, Katsumi, Natsui, Takuya, Ogawa, Yujiro, Ohnishi, Yukiyoshi, Ohsawa, Satoshi, Sato, Masanori, Satoh, Daisuke, Shidara, Tetsuo, Shirakawa, Akihiro, Suetake, Masaaki, Sugimoto, Hiroshi, Suwada, Tsuyoshi, Takatomi, Toshikazu, Takenaka, Tateru, Tanaka, Madoka, Tawada, Masafumi, Yano, Yoshiharu, Yokoyama, Kazue, Yoshida, Mitsuhiro, Zang, Lei, and Zhou, Xiangyu

Subjects
A21 Secondary Beams, Physics::Accelerator Physics, High Energy Physics::Experiment, 03 Particle Sources and Alternative Acceleration Techniques, Accelerator Physics
Abstract

The KEKB positron source is under the upgrade for SuperKEKB. The previous positron production target and capture section have been removed and the new system is constructed at a location forty meters upstream to have sufficient energy margin for beam injection to the newly introduced damping ring. A flux concentrator is introduced in the new capture section to make an adiabatic matching system. Large aperture (30mm in diameter) S-band accelerating structures are introduced in the capture section and in the subsequent accelerator module to enlarge the transverse phase space acceptance. The beam focusing system of quadrupoles is also upgraded for a comparable beam acceptance to that of the capture section. This paper reports on the status of the SuperKEKB positron source construction and the preliminary positron beam commissioning., Proceedings of the 5th Int. Particle Accelerator Conf., IPAC2014, Dresden, Germany

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