Selective electron beam sensing through coherent Cherenkov diffraction radiation

Author:

Senes E.1ORCID,Krupa M.1ORCID,Mazzoni S.1ORCID,Lasocha K.1ORCID,Lefevre T.1,Shloegelhofer A.1ORCID,Wendt M.1,Davut C.2ORCID,Karataev P.3ORCID,Pakuza C.4,Spear B.4

Affiliation:

1. CERN

2. University of Manchester

3. Royal Holloway, University of London

4. University of Oxford

Abstract

We exploit the coherent emission of Cherenkov diffraction radiation (ChDR) by a relativistic electron beam to sense its position even in the presence of other particle beams. ChDR is produced in alumina inserts embedded in the vacuum chamber walls and recorded in a narrow band centered at 30 GHz. This nontrivial solution has been implemented for plasma wakefield accelerators, where the electron beam to be sensed can copropagate with another high-energy proton beam that generates the plasma wakefield. In addition, at variance with most existing position detectors, this method is insensitive to spurious electric charges due to the presence of plasma. We present the overall design of the detector as well as experimental results obtained in the AWAKE facility at CERN. Published by the American Physical Society 2024

Funder

Science and Technology Facilities Council

University of London

Publisher

American Physical Society (APS)

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