Overview
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The KEK injector linac delivers a 4 GeV positron beam into the SuperKEKB asymmetric-energy collider. It consists of a tungsten target, a flux-concentrator (FC), a bridge coil, large aperture S-band structures (LASs), 15-m long solenoids, a positron-electron separation chicane, and a 50-m long hundred-quad section. It is designed to provide a positron bunch of 4 nC with 10-nC primary electron. Beside the target by 3.5 mm is a hole to pass the electron beam, which is arranged at the center of the LAS behind not to blow-up the emittance. For the KEKB project until 2008 the target was retracted during electron acceleration. In 2006 for a year a target of tungsten crystal was utilized to enhance positron yield by 25%. For the TRISTAN project from 1986 to 1993 a separate 80-m positron linac was utilized. Please send your comments and questions to K.Furukawa or Y.Enomoto. |
Presentations and Articles
A New Flux Concentrator Made of Cu Alloy for the SuperKEKB Positron Source [pdf],
[doi],
[poster-slide]
Y. Enomoto, K. Abe, N. Okada, T. Takatomi,
Proc. of IPAC2021, Foz do Iguaçu, Brazil, May 2021, pp.2954-2956, WEPAB144.
First Synchronous Measurement of Single-Bunched Electron and Positron Beams with a Wideband Feedthrough-BPM at the Positron Capture Section of the SuperKEKB Injector Linac [pdf],
[doi],
[poster]
M.A. Rehman, T. Suwada, F. Miyahara,
Proc. of IPAC2021, Foz do Iguaçu, Brazil, May 2021, pp.557-560, MOPAB163.
Commissioning of Positron Damping Ring and Beam Transport for SuperKEKB [pdf],
[doi]
N. Iida, Y. Funakoshi, H. Ikeda, T. Ishibashi, H. Kaji, T. Kamitani,
M. Kikuchi, T. Kobayashi, H. Koiso, F. Miyahara, T. Mori, Y. Ohnishi,
Y. Seimiya, H. Sugimoto, H. Sugimura, R. Ueki, Y. Yano, D. Zhou,
Proc. of eeFACT2018, Kowloon, Hong Kong, September 2018, pp.152-156, TUPAB07.
Design, Manufacture and Operation of the Beam Spoiler for Positron Target Protection [pdf]
L. Zang, T. Kamitani,
Proc. of IPAC2014, Dresden, Germany, June 2014, pp.573-575, MOPRI002.
Positron Yield Optimization by Adjusting the Components Offset and Orientation [pdf]
L. Zang, M. Akemoto, S. Fukuda, K. Furukawa, T. Higo, N. Iida, K. Kakihara, T. Kamitani, T. Miura, F. Miyahara, Y. Ogawa, H. Someya, T. Takatomi, K. Yokoyama, S. Ushimoto,
Proc. of IPAC2014, Dresden, Germany, June 2014, pp.576-578, MOPRI003.
SuperKEKB Positron Source Construction Status [pdf]
T. Kamitani, M. Akemoto, D. Arakawa, Y. Arakida, A. Enomoto, S. Fukuda, Y. Funakoshi, K. Furukawa, T. Higo, H. Honma, N. Iida, M. Ikeda, E. Kadokura, H. Kaji, K. Kakihara, H. Katagiri, M. Kikuchi, H. Koiso, M. Kurashina, S. Matsumoto, T. Matsumoto, H. Matsushita, S. Michizono, K. Mikawa, T. Mimashi, T. Miura, F. Miyahara, T. Mori, A. Morita, H. Nakajima, K. Nakao, T. Natsui, Y. Ogawa, Y. Ohnishi, S. Ohsawa, M. Satoh, T. Shidara, A. Shirakawa, M. Suetake, H. Sugimoto, T. Suwada, T. Takatomi, T. Takenaka, M. Tanaka, M. Tawada, Y. Yano, K. Yokoyama, M. Yoshida, L. Zang, X. Zhou, D. Satoh,
Proc. of IPAC2014, Dresden, Germany, June 2014, pp.579-581, MOPRI004.
Large-aperture Travelling-wave Accelerator Structure for Positron Capture of SuperKEKB Injector Linac [pdf]
S. Matsumoto, T. Higo, K. Kakihara, T. Kamitani, M. Tanaka,
Proc. of IPAC2014, Dresden, Germany, June 2014, pp.3872-3874, THPRI047.
Design Study of a New Large Aperture Flux Concentrator [pdf]
L. Zang, M. Akemoto, K. Furukawa, S. Fukuda, T. Higo, T. Kamitani,
K. Kakihara, Y. Ogawa, H. Someya, T. Takatomi,
Proc. of IPAC2013, Shanghai, China, May 2013, pp.318-320, MOPFI018.
SuperKEKB Positron Source Target Protection Scheme [pdf]
L. Zang, T. Kamitani,
Proc. of IPAC2013, Shanghai, China, May 2013, pp.315-317, MOPFI017.
Positron Injector Linac Upgrade for SuperKEKB [pdf],
[slide]
T. Kamitani, M. Akemoto, Y. Arakida, D. Arakawa, A. Enomoto, S. Fukuda,
K. Furukawa, Y. Higashi, T. Higo, H. Honma, N. Iida, M. Ikeda, E. Kadokura,
K. Kakihara, H. Katagiri, M. Kurashina, H. Matsushita, S. Matsumoto,
T. Matsumoto, S. Michizono, K. Mikawa, T. Miura, F. Miyahara, T. Mori,
H. Nakajima, K. Nakao, T. Natsui, S. Ohsawa, Y. Ogawa, M. Satoh, T. Shidara,
A. Shirakawa, T. Suwada, H. Sugimoto, T. Takatomi, T. Takenaka, Y. Yano,
K. Yokoyama, M. Yoshida, L. Zang, X. Zhou, D. Satoh,
Proc. of LINAC2012, Tel-Aviv, Israel, September 2012, pp.177-179, MOPB002.
Design Optimization of Flux Concentrator for SuperKEKB [pdf]
L. Zang, T. Kamitani, S. Fukuda, Y. Ogawa,
Proc. of IPAC2012, New Orleans, USA, May 2012, pp.1473-1475, TUPPD032.
Development of L-Band Positron Capture Accelerating Structure with Kanthal-coated Collinear Load for Super KEKB [pdf]
F. Miyahara, Y. Arakida, T. Higo, N. Iida, K. Kakihara, T. Kamitani, S. Matsumoto,
Proc. of IPAC2012, New Orleans, USA, May 2012, pp.1933-1935, TUPPR051.
Beam Dynamics in Positron Injector Systems for Next Generation B Factories [jacow],
[jacow-slide]
N. Iida, H. Ikeda, T. Kamitani, M. Kikuchi, K. Oide, D.M. Zhou,
Proc. of IPAC2011, San Sebastian, Spain, September 2011, pp.2857-2860, THYA01.
Development of L-Band Positron Capture Accelerator System in KEKB Injector Linac [pdf]
S. Matsumoto, M. Akemoto, T. Higo, H. Honma, M. Ikeda, K. Kakihara,
T. Kamitani, H. Nakajima, K. Nakao, Y. Ogawa, S. Ohsawa, Y. Yano, K. Yokoyama, M. Yoshida,
Proc. of LINAC2010, Tsukuba, Japan, September 2010, pp.73-75, MOP012.
Design of Positron Damping Ring for Super-KEKB [jacow],
[poster]
M. Kikuchi, T. Abe, K. Egawa, H. Fukuma, K. Furukawa, N. Iida, H. Ikeda,
T. Kamitani, K. Kanazawa, K. Ohmi, K. Oide, K. Shibata, M. Tawada, M. Tobiyama, D.M. Zhou,
Proc. of IPAC2010, Kyoto, Japan, May 2010, pp.1641-1643, TUPEB054.
Design of the Positron Transport System for SuperKEKB [jacow]
N. Iida, T. Kamitani, M. Kikuchi, Y. Ogawa, K. Oide,
Proc. of IPAC2010, Kyoto, Japan, May 2010, pp.4284-4286, TUPEB054.
Operational Performance of Positron Production from Trungsten Single-crystal Target at the KEKB Injector [pdf],
[poster]
T. Suwada, K. Furukawa,
Proc. of PAC2009, Vancouver, Canada, May 2009, pp.518-520, MO6RFP066.
Enhancement of the Positron Intensity by a Tungsten Single Crystal Target at the KEKB Injector Linac [pdf]
T. Suwada, M. Satoh, T. Sugimura, T. Kamitani, K. Furukawa, K. Umemori,
H. Okuno, T. Haruna, R. Hamatsu, T. Sumiyoshi, K. Yoshida, A.P. Potylitsin, I.S. Tropin, R. Chehab,
Proc. of PAC2007, Albuquerque, USA, June 2007, pp.2778-2780, THPMN030.
Positron-Production Experiment in Tungsten Crystal using 4 and 8-GeV
Channeling Electrons at the KEKB Injector Linac [pdf]
T. Suwada, S. Anami, R. Chehab, A. Enomoto, K. Furukawa, K. Kakihara,
T. Kamitani, Y. Ogawa, S. Ohsawa, H. Okuno, T. Oogoe,
Proc. of EPAC2002, Paris, France, June 2002, pp.509-511.
Two-Bunch Operation of the KEKB Linac for Doubling
the Positron Injection Rate to the KEKB Ring [pdf]
Y. Ogawa, A. Enomoto, Y. Funakoshi, K. Furukawa, T. Honda, N. Iida,
N. Kamikubota, T.Kamitani, E. Kikutani, M. Kikuchi, H. Kobayashi,
H. Koiso, T. Matsumoto, Y. Ohnishi, S. Ohsawa, K. Oide, T. Suwada,
Proc. of APAC2001, Beijing, China, September 2001, pp.112-114.
Increase of Positrons by a High-Intensity Two-Bunch Acceleration Scheme at the KEKB Linac [pdf]
S. Ohsawa, A. Emonoto, K. Furukawa, N. Iida, M. Ikeda, N. Kamikubota,
T. Kamitani, E. Kikutani, H. Kobayashi, H. Koiso, T. Matsumoto,
Y. Ogawa, Y. Ohnishi, K. Oide, T. Suwada,
Proc. of PAC2001, Chicago, U.S, June 2001, pp.3284-3286.
High-Intensity, Two-Bunch Acceleration for Doubling Positron Production at the KEKB Linac [pdf]
Y. Ogawa, A. Enomoto, K. Furukawa, H. Kobayashi, T. Matsumoto, S. Ohsawa T. Suwada,
Proc. of HEACC2001, Tsukuba, Japan, March 2001.
Positron-Production Experiment by 8-GeV Channeling Electrons in Crystal Tungsten at the KEKB Injector Linac [pdf]
T. Suwada, S. Anami, A. Enomoto, K. Furukawa, K. Kakihara, T. Kamitani,
Y.Ogawa, S. Ohsawa, T. Oogoe, H. Okuno, T. Fujita, K. Umemori, K. Yoshida,
R. Hamatsu, K. Sasahara, V.Ababiy, A. P. Potylitsin, I. E. Vnukov,
Proc. of HEACC2001, Tsukuba, Japan, March 2001.
Japanese Articles
A new flux concentrator made of Cu alloy for the SuperKEKB positron source [pdf]
[slide]
Y. Enomoto,
Proc of PASJ2021, Takasaki, Japan, Aug.2021, pp.-, THOB04.
Surveying of DC Solenoids for Positron Beam and Installation of BPMs and Steering Coils for SuperKEKB Injector Linac [pdf]
[poster]
K. Kakihara,
Proc of PASJ2021, Takasaki, Japan, Aug.2021, pp.-, THP031.
Surveying of DC Solenoids for Positron Beam and Installation of BPMs and Steering Coils for SuperKEKB Injector Linac [pdf]
[poster]
N. Iida, M. Kikuchi, Y. Seimiya, T. Mori, T. Kamitani, K. Kakihara, T. Oogoe, Y. Arakida, M. Tawada,
Proc of PASJ2020, Matsuyama, Japan, Sep.2020, pp.871-874, FRPP69.
Beam timing stability diagnostics of primary electrons for positron production at the KEKB Injector Linac [pdf]
[poster]
T. Suwada,
Proc of PASJ2019, Kyoto, Japan, Jul-Aug.2019, pp.526-530, WEPI032.
Radiation Shield for the Positron Target of KEKB Injector LINAC [pdf]
[poster]
S. Matsumoto, H. Iwase, K. Kakihara, T. Kamitani, T. Sanami, T. Higo, H. Yamaoka,
Proc of PASJ2016, Chiba, Japan, Aug.2016, pp.1288-1290, TUP133.
Present status of SuperKEKB positron source [pdf]
T. Kamitani，M. Akemoto，D. Arakawa，Y. Arakida, N. Iida，M. Ikeda，H. Iwase，A. Enomoto，Y. Enomoto，S. Ohsawa，Y. Ohnishi，N. Okada，Y. Ogawa，K. Kakihara，S. Kazama，H. Kaji，H. Katagiri，E. Kadokura，M. Kikuchi，Q. Feng，M. Kurashina，H. Koiso，M. Satoh，L. Zang，T. Shidara，X. Zhou，A. Shirakawa，M. Suetake，H. Sugimoto，T. Suwada，T. Takatomi，T. Takenaka，M. Tanaka，M. Tawada，R. Zhang，K. Nakao，H. Nakajima，T. Natsui，T. Higo，S. Fukuda，Y. Funakoshi，K. Furukawa，H. Honma，H. Matsushita，S. Matsumoto，T. Matsumoto，T. Miura，K. Mikawa，S. Michizono，T. Mimashi，F. Miyahara，T. Mori，A. Morita，Y. Yano，K. Yokoyama，M. Yoshida，D. Satoh,
Proc of PASJ2016, Tsuruga, Japan, Aug.2015, pp.1064-1068, THP044.
