Contribution to a conference proceedings

GSI-2025-00427

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Imaging a high-power hollow electron beam non-invasively with a gas-jet-based beam profile monitor

Wenander, F. ; Sidorowski, K. ; Forck, P.GSI* ; Udrea, S.GSI* ; Mazzoni, S. ; Sequeiro, C. ; Welsch, C. ; Sameed, M. ; Stringer, O. ; Veness, R. ; Lefevre, T. ; Churchman, A. ; Zhang, H. (Corresponding author) ; Ady, M. ; Rossi, A. ; Webber-Date, A. ; Schneider, G. ; Sedlacek, O.

2023
JACoW Publishing

Please use a persistent id in citations: doi:10.18429/JACOW-IPAC2023-THPL066  doi:10.15120/GSI-2025-00427

Abstract: The Hollow Electron Lens (HEL) was proposed to actively remove the beam halo of the proton beam for the HL-LHC upgrade. Currently, the concept of generating such an electron beam is being tested in a dedicated Electron Beam Test Stand (EBTS) at CERN. It currently produces a hollow electron beam with 7 keV energy and 0.4 A current 25 us pulsed with 2 Hz which will be confined in a strong solenoid field. A gas curtain-based beam profile monitor was developed to characterize the beam non-invasively during operation. It injects a directional gas sheet at 45 degrees to interact with the electron beam. Gas particles are excited and emit fluorescent photons which are collected by an intensified camera system. This allows the reconstruction of the profile of the hollow electron beam. This contribution presents the design of the monitor and discusses the initial results obtained with a hollow electron beam at the EBTS.

Keyword(s): Accelerator Physics ; mc6-beam-instrumentation-controls-feedback-and-operational-aspects - MC6: Beam Instrumentation, Controls, Feedback and Operational Aspects ; mc6-t03-beam-diagnostics-and-instrumentation - MC6.T03: Beam Diagnostics and Instrumentation

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

---

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

---

Database coverage:
;

---