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23 papers
Smallest vertical beam sizes achieved in high-energy accelerators
Rogelio Tomas Garcia, Yukiyoshi Ohnishi, Frank Zimmermann
FCC-ee aims at colliding electrons and positrons with vertical rms beam sizes between 30 and 50 nm with beam energies extending from about 40 GeV to 182.5 GeV. In this report, we c…
Luminosity performance of SuperKEKB
Demin Zhou, Kazuhito Ohmi, Yoshihiro Funakoshi +1
Since April 2020, the SuperKEKB has been operating with the crab waist scheme. The luminosity record achieved in June 2022 was , w…
Simulations and experimental results on beam-beam effects in SuperKEKB
Demin Zhou, Kazuhito Ohmi, Yoshihiro Funakoshi +2
The beam-beam interaction is one of the most critical factors determining the luminosity performance of colliders. As a circular collider utilizing the crab-waist scheme, multiple…
A time resolved study of injection backgrounds during the first commissioning phase of SuperKEKB
Miroslav Gabriel, Frank Simon, Hendrik Windel +13
We report on measurements of beam backgrounds during the first commissioning phase of the SuperKEKB collider in 2016, performed with the plastic scintillator and silicon photomulti…
Highlights from SuperKEKB Phase 2 Commissioning
Yukiyoshi Ohnishi
SuperKEKB is an electron-positron asymmetric-energy collider to search new physics phenomena appeared in B-meson decays. In order to accomplish this purpose, 40 times the luminosit…
First Measurements of Beam Backgrounds at SuperKEKB
P. M. Lewis, I. Jaegle, H. Nakayama +67
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 s…