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1.
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The SuperKEKB Has Broken the World Record of the Luminosity
/ Funakoshi, Yoshihiro (KEK, Tsukuba) ; Abe, Tetsuo (KEK, Tsukuba) ; Akai, Kazunori (KEK, Tsukuba) ; Arimoto, Yasushi (KEK, Tsukuba) ; Egawa, Kazumi (KEK, Tsukuba) ; Enomoto, Shun (KEK, Tsukuba) ; Fukuma, Hitoshi (KEK, Tsukuba) ; Furukawa, Kazuro (KEK, Tsukuba) ; Iida, Naoko (KEK, Tsukuba) ; Ikeda, Hitomi (KEK, Tsukuba) et al.
The SuperKEKB broke the world record of the luminosity in June 2020 in the Phase 3 operation. The luminosity has been increasing since then and the present highest luminosity is 4.65 x 10³⁴ cm⁻²s⁻¹ with β_{y}^{*} of 1 mm. [...]
2022 - 5 p.
- Published in : JACoW IPAC 2022 (2022) 1-5
Fulltext: PDF;
In : 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.1-5
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2.
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Impact of Bunch Current on Optics Measurements in SuperKEKB
/ Keintzel, Jacqueline (CERN ; TU Vienna) ; Ishibashi, Takuya (KEK, Tsukuba) ; Koiso, Haruyo (KEK, Tsukuba) ; Mitsuka, Gaku (KEK, Tsukuba) ; Morita, Akio (KEK, Tsukuba) ; Ohmi, Kazuhito (KEK, Tsukuba) ; Ohnishi, Yukiyoshi (KEK, Tsukuba) ; Sugimoto, Hiroshi (KEK, Tsukuba) ; Terui, Shinji (KEK, Tsukuba) ; Tobiyama, Makoto (KEK, Tsukuba) et al.
SuperKEKB has recently achieved the world record instantaneous luminosity of 2.8 × 10³⁴ \si{cm⁻²s⁻¹} and aims at reaching a target luminosity of about 6 × 10³⁵ \si{cm⁻²s⁻¹}. To accomplish this goal it is planned to increase beam currents up to §I{3.6}{A} and §I{2.6}{A} for the positron and the electron ring, respectively. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 1356-1359
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.1356-1359
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3.
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SuperKEKB Optics Measurements Using Turn-by-Turn Beam Position Data
/ Keintzel, Jacqueline (CERN ; TU Vienna) ; Koiso, Haruyo (KEK, Tsukuba) ; Mitsuka, Gaku (KEK, Tsukuba) ; Morita, Akio (KEK, Tsukuba) ; Ohmi, Kazuhito (KEK, Tsukuba) ; Ohnishi, Yukiyoshi (KEK, Tsukuba) ; Sugimoto, Hiroshi (KEK, Tsukuba) ; Tobiyama, Makoto (KEK, Tsukuba) ; Tomás García, Rogelio (CERN) ; Yang, Renjun (KEK, Tsukuba)
SuperKEKB, an asymmetric electron-positron collider, has recently achieved the world record instantaneous luminosity of 2.8 × 10³⁴ \si{cm⁻²s⁻¹} using crab-waist collision scheme. In order to reach the design value of 6×10³⁵ \si{cm⁻²s⁻¹} a vertical beta function at the interaction point of §I{0.3}{mm} is required, demanding unprecedented optics control. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 1352-1355
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.1352-1355
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4.
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Off-momentum Optics at SuperKEKB
/ Ohnishi, Yukiyoshi (KEK, Tsukuba) ; Koiso, Haruyo (KEK, Tsukuba) ; Morita, Akio (KEK, Tsukuba) ; Ohmi, Kazuhito (KEK, Tsukuba) ; Oide, Katsunobu (CERN) ; Sugimoto, Hiroshi (KEK, Tsukuba)
The nano-beam scheme can squeeze the vertical beta function at the IP much smaller than the bunch length. It implies that the large chromaticity is generated in the vicinity of the final focus quadrupole magnets and the strong sextupoles are adopted to correct the chromaticity, for instance the local chromaticity corrections. [...]
JACOW, 2019 - 5 p.
- Published in : 10.18429/JACoW-eeFACT2018-TUOBB02
Fulltext: PDF;
In : 62nd ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e− Colliders, Hong Kong, China, 24 - 27 Sep 2018, pp.TUOBB02
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5.
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First Measurements of Beam Backgrounds at SuperKEKB
/ Vahsen, S.E. (University of Hawaii) ; Lewis, P.M. (University of Hawaii) ; Jaegle, I. (University of Florida) ; Nakayama, H. (KEK) ; Aloisio, A. (University of Naples Federico II & INFN Napoli) ; Ameli, F. (INFN Roma) ; Barrett, M. (Wayne State University) ; Beaulieu, A. (University of Victoria) ; Bosisio, L. (University of Trieste & INFN) ; Branchini, P. (INFN Roma) et al.
The high design luminosity of the SuperKEKB electron-positron collider is expected to result in challenging levels of beam-induced backgrounds in the interaction region. Properly simulating and mitigating these backgrounds is critical to the success of the Belle~II experiment. [...]
AIDA-2020-PUB-2018-005.-
Geneva : CERN, 2018
- Published in : Nucl. Instrum. Methods Phys. Res., Sect. A
Fulltext: PDF;
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6.
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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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7.
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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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8.
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9.
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Belle II Technical Design Report
/ Abe, T ; Adachi, I ; Adamczyk, K ; Ahn, S ; Aihara, H ; Akai, K ; Aloi, M ; Andricek, L ; Aoki, K ; Arai, Y et al.
The Belle detector at the KEKB electron-positron collider has collected almost 1 billion Y(4S) events in its decade of operation. [...]
arXiv:1011.0352 ; KEK REPORT 2010-1.
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2010.
Preprint
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10.
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Status of LHC Crab Cavity simulations and beam studies
/ Calaga, R (Brookhaven) ; De-Maria, R (Brookhaven) ; Assmann, R (CERN) ; Barranco, J (CERN) ; Caspers, F (CERN) ; Ciapala, E (CERN) ; Linnecar, T (CERN) ; Metral, E (CERN) ; Sun, Y (CERN) ; Tomàs, R (CERN) et al.
WP: 10: SC RF technology for higher intensity proton accelerators and higher energy electron linacs ; 4: AccNet: Accelerator Science Networks
Task: 10.3: LHC Crab Cavities ; 4.2: EuroLumi
The LHC crab cavity program is advancing rapidly towards a first prototype which is anticipated to be tested during the early stages of the LHC phase I upgrade and commissioning. [...]
EuCARD-CON-2009-011 ; EuCARD-CON-2010-042 ; CERN-ATS-2009-035.
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2010.
Published version from PAC09
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