Stringer, O, Zhang, H 
ORCID: 0000-0002-4299-7609, Kumar, N ORCID: 0000-0002-0292-8262 and Welsch, C ORCID: 0000-0001-7085-0973
(2022)
A GAS JET BEAM HALO MONITOR FOR LINACS.
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Abstract
The gas jet beam profile monitor is a non-invasive beam monitor that is currently being commissioned at the Cockcroft Institute. It utilises a supersonic gas curtain which traverses the beam perpendicular to its propagation and measures beam-induced ionisation interactions of the gas. A 2D transverse beam profile image is created by orientating the gas jet 45 degrees to obtain both X and Y distributions of the beam. This paper builds upon previously used single-slit skimmers and improves their ability to form the gas jet into a desired distribution for imaging beam halo. A skimmer device removes off-momentum gas particles and forms the jet into a dense thin curtain, suitable for transverse imaging of the beam. The use of a novel double-slit skimmer is shown to provide a mask-like void of gas over the beam core, increasing the relative intensity of the halo interactions for measurement. Such a non-invasive monitor would be beneficial to linacs by providing real time beam characteristic measurements without affecting the beam. More specifically, beam halo behaviour is a key characteristic associated with beam losses within linacs.
| Item Type: | Conference or Workshop Item (Unspecified) |
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| Divisions: | Faculty of Science and Engineering > School of Physical Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 07 Mar 2024 14:37 |
| Last Modified: | 07 Mar 2024 14:37 |
| DOI: | 10.18429/JACoW-LINAC2022-MOPORI04 |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3179217 |
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