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Optics measurements and corrections at the early commissioning of SuperKEKB
/ Ohnishi, Y (KEK, Tsukuba, Kapan) ; Sugimoto, H (KEK, Tsukuba, Kapan) ; Morita, A (KEK, Tsukuba, Kapan) ; Koiso, H (KEK, Tsukuba, Kapan) ; Oide, K (KEK, Tsukuba, Kapan) ; Ohmi, K (KEK, Tsukuba, Kapan) ; Zhou, D (KEK, Tsukuba, Kapan) ; Funakoshi, Y (KEK, Tsukuba, Kapan) ; Carmignani, N (ESRF, Grenoble, France) ; Liuzzo, S M (ESRF, grenoble, France) et al.
We present experimental results of measurements and corrections for the optics at the early Phase-1 commissioning of SuperKEKB. The aim of SuperKEKB is a positron-electron collider built to achieve the target luminosity of 8x10^35 cm^−2s^−1. [...]
CERN-ACC-2017-0039.-
Geneva : CERN, 2017
- Published in : 10.18429/JACoW-IPAC2016-THPOR007
Fulltext: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.THPOR007
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2.
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Electron cloud effect and its cures in the SuperKEKB positron ring
/ Suetsugu, Y (KEK, Tsukuba) ; Fukuma, H (KEK, Tsukuba) ; Ohmi, K (KEK, Tsukuba) ; Tobiyama, M (KEK, Tsukuba) ; Shibata, K (KEK, Tsukuba)
Various countermeasures against the electron cloud effect (ECE) were adopted for the positron ring of SuperKEKB. During Phase-1 commissioning from February to June 2016, however, the ECE was observed, such as a blow up of the vertical beam size. [...]
2020 - 7 p.
Fulltext from publisher: PDF;
In : ECLOUD’18: Proceedings of the Joint INFN-CERN-ARIES Workshop on Electron-Cloud Effects, La Biodola, Isola d'Elba, Italy, 3 - 7 Jun 2018, pp.201-208 (CERN-2020-007)
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3.
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Electron cloud effects in SuperKEKB commissioning
/ Ohmi, K (KEK, Tsukuba ; Sokendai, Tsukuba) ; Flanagan, J (KEK, Tsukuba ; Sokendai, Tsukuba) ; Fukuma, H (KEK, Tsukuba ; Sokendai, Tsukuba) ; Ikeda, H (KEK, Tsukuba ; Sokendai, Tsukuba) ; Mulyani, E (KEK, Tsukuba ; Sokendai, Tsukuba) ; Shibata, K (KEK, Tsukuba ; Sokendai, Tsukuba) ; Suetsugu, Y (KEK, Tsukuba ; Sokendai, Tsukuba) ; Tobiyama, M (KEK, Tsukuba ; Sokendai, Tsukuba)
A vertical emittance growth (beam size blow-up) due to electron cloud has been observed in the positron low energy ring (LER) in Phase-I commissioning (2016) of SuperKEKB. The emittance growth is caused by fast head-tail instability due to wake force induced by electron cloud. [...]
2020 - 4 p.
Fulltext from publisher: PDF;
In : ECLOUD’18: Proceedings of the Joint INFN-CERN-ARIES Workshop on Electron-Cloud Effects, La Biodola, Isola d'Elba, Italy, 3 - 7 Jun 2018, pp.179-182 (CERN-2020-007)
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5.
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Early Commissioning of the Luminosity Dither System for SuperKEKB
/ Funakoshi, Yoshihiro (KEK, Tsukuba) ; Bambade, Philip (Orsay, LAL) ; Brown, David (SLAC) ; Di Carlo, Salvatore (Orsay, LAL) ; El Khechen, Dima (CERN) ; Fisher, Alan (SLAC) ; Jehanno, Didier (Orsay, LAL) ; Kawamoto, Takashi (KEK, Tsukuba) ; Masuzawa, Mika (KEK, Tsukuba) ; Nakamura, Shu (KEK, Tsukuba) et al.
SuperKEKB is an electron-positron double ring collider at KEK which aims at a peak luminosity of 8 x 10³⁵ cm⁻²s⁻¹ by using what is known as the ’nano-beam’ scheme. A luminosity dither system is employed for collision orbit feedback in the horizontal plane. [...]
JACOW, 2019 - 5 p.
- Published in : 10.18429/JACoW-eeFACT2018-WEXBA04
Published fulltext: PDF;
In : 62nd ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e− Colliders, Hong Kong, China, 24 - 27 Sep 2018, pp.WEXBA04
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6.
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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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7.
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Early Commissioning of the Luminosity Dither Feedback for SuperKEKB
/ Masuzawa, Mika (KEK, Tsukuba) ; Bambade, Philip (Orsay, LAL) ; Brown, David (SLAC) ; Di Carlo, Salvatore (Orsay, LAL) ; El Khechen, Dima (CERN) ; Fisher, Alan (SLAC) ; Funakoshi, Yoshihiro (KEK, Tsukuba) ; Jehanno, Didier (Orsay, LAL) ; Kawamoto, Takashi (KEK, Tsukuba) ; Nakamura, Shu (KEK, Tsukuba) et al.
SuperKEKB is an electron–positron double ring collider that aims to achieve a peak luminosity of 8 x 10$^{35}$ cm$^{-2}$ s$^{-1}$ by using what is known as the “nano-beam” scheme. A luminosity dither system is employed for collision orbit feedback in the horizontal plane. [...]
JACoW, 2019 - 4 p.
- Published in : 10.18429/JACoW-IBIC2018-TUPC13
Published fulltext: PDF;
In : 7th International Beam Instrumentation Conference, Shanghai, China, 9 - 13 Sep, 2018, pp.TUPC13
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8.
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Coherent Beam-Beam Instability in Collisions with a Large Crossing Angle
/ Ohmi, K (KEK, Tsukuba) ; Kuroo, N (KEK, Tsukuba ; Tsukuba U. (main)) ; Oide, K (KEK, Tsukuba ; CERN) ; Zhou, D (KEK, Tsukuba ; CERN) ; Zimmermann, F (CERN)
In recent years the “crab-waist collision” scheme [P. Raimondi, Proceedings of 2nd SuperB Workshop, Frascati, 2006.; M. [...]
2017 - 5 p.
- Published in : Phys. Rev. Lett. 119 (2017) 134801
Fulltext: PDF;
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9.
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Benchmarking of Simulations of Coherent Beam-beam Instability with SuperKERKB Measurement
/ Ohmi, Kazuhito (KEK, Tsukuba) ; El Khechen, Dima (CERN) ; Hirosawa, Kouki (Sokendai, Tsukuba) ; Koiso, Haruyo (KEK, Tsukuba) ; Ohnishi, Yukiyoshi (KEK, Tsukuba)
Coherent beam-beam instability in head-tail mode has been predicted in collision with a large crossing angle. The instability is serious for design of future e⁺e⁻ colliders based on the large crossing angle collision. [...]
JACOW, 2019 - 3 p.
- Published in : 10.18429/JACoW-eeFACT2018-TUYBA01
Fulltext: PDF;
In : 62nd ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e− Colliders, Hong Kong, China, 24 - 27 Sep 2018, pp.TUYBA01
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Commissioning of the Laser System for SPARC Photoinjector
/ Vicario, Carlo (INFN/LNF, Frascati) ; Bellaveglia, Marco (INFN/LNF, Frascati) ; Filippetto, Daniele (INFN/LNF, Frascati) ; Gallo, Alessandro (INFN/LNF, Frascati) ; Gatti, Giancarlo (INFN/LNF, Frascati) ; Ghigo, Andrea (INFN/LNF, Frascati) ; Musumeci, Pietro (INFN-Roma, Roma) ; Petrarca, Massimo (INFN-Roma, Roma)
CARE-Conf-06-051-PHIN; CARE-Conf-2006-051-PHIN.-
2006 - 3 p.
Fulltext: PDF; External link: Published version from JACoW
In : 10th European Particle Accelerator Conference, Edinburgh, UK, 26 - 30 Jun 2006, pp.3146
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