Contribution to a conference proceedings

GSI-2025-00423

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Gas Jet-Based Fluorescence Profile Monitor for Low Energy Electrons and High Energy Protons at LHC

Sedláček, O. (Corresponding author) ; Ady, M. ; Churchman, A. ; Forck, P.GSI* ; Mazzoni, S. ; Rossi, A. ; Sameed, M. ; Schneider, G. ; Sequeiro, C. ; Sidorowski, K. ; Stringer, O. ; Udrea, S.GSI* ; Veness, R. ; Webber-Date, A. ; Welsch, C. ; Zhang, H. ; Schaa, V. R. W. (Editor) ; Batten, T. (Editor) ; Bree, M. (Editor) ; Petit-Jean-Genaz, C. (Editor) ; Hunter, D. (Editor)

2023
JACoW Publishing Geneva, Switzerland

Please use a persistent id in citations: doi:10.18429/JACOW-IBIC2023-WE3I01  doi:10.15120/GSI-2025-00423

Abstract: The ever-developing accelerator capabilities of increasing beam intensity, e.g. for High Luminosity LHC (HL-LHC), demand novel non-invasive beam diagnostics. As a part of the HL-LHC project a Beam Gas Curtain monitor (BGC), a gas jet-based fluorescence transverse profile monitor, is being developed. The BGC uses a supersonic gas jet sheet that traverses the beam at 45° and visualizes a two-dimensional beam-induced fluorescent image. The principle of observing photons created by fluorescence makes the monitor insensitive to present electric or magnetic fields. Therefore, the monitor is well suited for high-intensity beams such as low-energy electron beam of Hollow Electron Lens (HEL), and HL-LHC proton beam, either as a profile or an overlap monitor. This talk will focus on the first gas jet measured transverse profile of the 7keV hollow electron beam. The measurements were carried out at the Electron Beam Test Stand at CERN testing up to 5A beam for HEL. A comparison with Optical Transition Radiation measurements shows consistency with the BGC results. The BGC installation of January 2023 at LHC is shown, including past results from distributed gas fluorescence tests.

Keyword(s): Accelerator Physics ; 03 Transverse Profile and Emittance Monitors

Note: Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 International license.

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Contributing Institute(s):

1. Beam Diagnostics (BEA)

Research Program(s):

1. 899 - ohne Topic (POF4-899) (POF4-899)

Experiment(s):

1. no experiment theory work (theory)

Appears in the scientific report 2023

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