Author: Eldred, J.S.
Paper Title Page
WEXD6 Electron Cloud Measurements in Fermilab Booster 556
  • S.A.K. Wijethunga, J.S. Eldred, E. Pozdeyev, C.-Y. Tan
    Fermilab, Batavia, Illinois, USA
  Fermilab Booster synchrotron requires an intensity upgrade from 4.5×1012 to 6.5×1012 protons per pulse as a part of Fermilab’s Proton Improvement Plan-II (PIP-II). One of the factors which may limit the high-intensity performance is the fast transverse instabilities caused by electron cloud effects. According to the experience in the Recycler, the electron cloud gradually builds up over multiple turns in the combined function magnets and can reach final intensities orders of magnitude greater than in a pure dipole. Since the Booster synchrotron also incorporates combined function magnets, it is important to discover any existence of an electron cloud. And if it does, its effects on the PIP-II era Booster and whether mitigating techniques are required. As the first step, the presence or absence of the electron cloud was investigated using a gap technique. This paper presents experimental details and observations of the bunch-by-bunch tune shifts of beams with various bunch train structures at low and high intensities and simulation results conducted using PyECLOUD software.  
slides icon Slides WEXD6 [4.483 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-NAPAC2022-WEXD6  
About • Received ※ 02 August 2022 — Revised ※ 11 August 2022 — Accepted ※ 21 August 2022 — Issue date ※ 09 September 2022
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