Measurements of Beam Backgrounds in SuperKEKB Phase 2 Article Swipe

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Zachary J. Liptak , A. Paladino , L. Ŝantelj , Jeffery Schueler , S. Stefkova , H. Tanigawa , Noritsugu Tsuzuki , A. Aloisio , P. Ahlburg , P. Bambade , G. Bassi , M. Barrett , J. Baudot , T. E. Browder , G. Casarosa , G. Cautero , D. Cinabro , G. Claus , D. Cuesta , F. Di Capua , Salvatore Di Carlo , John G. Flanagan , A. Frey , B. G. Fulsom , Yoshihiro Funakoshi , Gabriel Masset , Raffaele Girodano , D. Giuressi , M. Goffe , K. Hara , O. Hartbrich , M. T. Hedges , Daniel Heuchel , N. Iida , Takuya Ishibashi , K. Jääskeläinen , Didier Jehanno , Samuel de Johng , T. M. G. Kraetzschmar , M. Casarsa , L. Vitale , P. Leitl , P. Lewis , C. Mariñas , C. Miller , K. R. Nakamura , Hiroyuki Nakayama , C. Niebuhr , Y. Onuki , Chengguo Pang , B. Paschen , I. Ripp-Baudot , Giuliana Rizzo , J. M. Roney , H. Schreeck , B. Schwenker , F. Simon , M. Specht , S. Spataro , P. Sopicki , J. Takahashi , Shuji Tanaka , Shinji Terui , G. Tortone , T. Tsuboyama , Y. Uematsu , P. Urquijo , L. Vitale , H. Windel ·

YOU? · · 2021 · Open Access · · DOI: https://doi.org/10.48550/arxiv.2112.14537

The high design luminosity of the SuperKEKB electron-positron collider will result in challenging levels of beam-induced backgro\ unds in the interaction region. Understanding and mitigating these backgrounds is critical to the success of the Belle~II experi\ ment. We report on the first background measurements performed after roll-in of the Belle II detector, a period known as SuperKE\ KB Phase 2, utilizing both the BEAST II system of dedicated background detectors and the Belle II detector itself. We also repor\ t on first revisions to the background simulation made in response to our findings. Backgrounds measured include contributions f\ rom synchrotron radiation, beam-gas, Touschek, and injection backgrounds. At the end of Phase 2, single-beam backgrounds origina\ ting from the 4 GeV positron Low Energy Ring (LER) agree reasonably well with simulation, while backgrounds from the 7 GeV elect\ ron High Energy Ring (HER) are approximately one order of magnitude higher than simulation. We extrapolate these backgrounds for\ ward and conclude it is safe to install the Belle II vertex detector.

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Beam (structure) Phase (matter) Physics Optics Quantum mechanics

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Type: article
Language: en
Landing Page: https://doi.org/10.48550/arxiv.2112.14537
OA Status: green
Related Works: 10
OpenAlex ID: https://openalex.org/W4223624785

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DOI: https://doi.org/10.48550/arxiv.2112.14537

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Title: Measurements of Beam Backgrounds in SuperKEKB Phase 2

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Type: article

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Language: en

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Publication year: 2021

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Publication date: 2021-12-29

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Authors: Zachary J. Liptak, A. Paladino, L. Ŝantelj, Jeffery Schueler, S. Stefkova, H. Tanigawa, Noritsugu Tsuzuki, A. Aloisio, P. Ahlburg, P. Bambade, G. Bassi, M. Barrett, J. Baudot, T. E. Browder, G. Casarosa, G. Cautero, D. Cinabro, G. Claus, D. Cuesta, F. Di Capua, Salvatore Di Carlo, John G. Flanagan, A. Frey, B. G. Fulsom, Yoshihiro Funakoshi, Gabriel Masset, Raffaele Girodano, D. Giuressi, M. Goffe, K. Hara, O. Hartbrich, M. T. Hedges, Daniel Heuchel, N. Iida, Takuya Ishibashi, K. Jääskeläinen, Didier Jehanno, Samuel de Johng, T. M. G. Kraetzschmar, M. Casarsa, L. Vitale, P. Leitl, P. Lewis, C. Mariñas, C. Miller, K. R. Nakamura, Hiroyuki Nakayama, C. Niebuhr, Y. Onuki, Chengguo Pang, B. Paschen, I. Ripp-Baudot, Giuliana Rizzo, J. M. Roney, H. Schreeck, B. Schwenker, F. Simon, M. Specht, S. Spataro, P. Sopicki, J. Takahashi, Shuji Tanaka, Shinji Terui, G. Tortone, T. Tsuboyama, Y. Uematsu, P. Urquijo, L. Vitale, H. Windel

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Landing page: https://doi.org/10.48550/arxiv.2112.14537

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Concepts: Beam (structure), Phase (matter), Physics, Optics, Quantum mechanics

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