TUPS010

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URL	https://doi.org/10.18429/JACoW-IPAC2025-TUPS010
Title	Electron beam scattering in rubidium vapour at AWAKE
Authors	N. van Gils, M. Moreira, M. Turner, E. Gschwendtner European Organization for Nuclear Research L. Ranc, J. Mezger, M. Bergamaschi, P. Muggli Max Planck Institute for Physics D. Cooke, F. Pannell University College London A. Gerbershagen Particle Therapy Research Center
Abstract	The Advanced Wakefield Experiment (AWAKE) at CERN uses bunches from the CERN SPS to develop proton-driven plasma wakefield acceleration. AWAKE Run 2c (starting in 2029) plans for external on-axis injection of a 150 MeV electron witness bunch. The goal is to demonstrate emittance control of multi-GeV accelerated electron beams. Prior to injection, the electron witness bunch may have to traverse rubidium vapour. Since the beam must have the correct beam size and emittance at injection, it is important to quantify the effect of scattering. For this, first-principle estimates and the results from Geant4 simulations are compared with measurements of a ~20 MeV electron beam scattering in 5.5 m of rubidium vapour, showing good agreement. Building on this agreement, Geant4 simulations using the estimated AWAKE Run 2c parameters are performed. These predict that scattering will not increase the electron beam size or emittance
Paper	download: TUPS010.pdf
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Conference	16th International Particle Accelerator Conference
Series
Location	Taipei, Taiwan
Date	01-06 Jun 2025
Publisher	JACoW Publishing, Geneva, Switzerland
Editorial Board	* Ming-Chyuan Lin - National Synchrotron Radiation Research Center * Yoichi Sato - KEK * Jui-Che Huang - National Synchrotron Radiation Research Center * David Button - Australian Nuclear Science and Technology Organisation * Ping-Shun Chuang - National Synchrotron Radiation Research Center
Online ISBN	978-3-95450-248-6
Online ISSN	2673-5490
Received	31 March 2025
Revised	30 May 2025
Accepted	30 May 2025
Issued	05 November 2025
DOI	10.18429/JACoW-IPAC2025-TUPS010
Pages	1430-1433
Copyright	Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI.