Coherent diffraction radiation imaging methods to measure RMS bunch

Fiorito, RB, Welsch, CP ORCID: 0000-0001-7085-0973, Shkvarunets, AG, Clarke, C and Fisher, A
(2016) Coherent diffraction radiation imaging methods to measure RMS bunch. .

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The measurement of beam bunch length with high resolution is very important for the latest generation light sources and also a key parameter for the optimization of the final beam quality in high gradient plasma accelerators. In this contribution we present progress in the development of novel single shot, RMS bunch length diagnostic techniques based on imaging the near and far fields of coherent THz diffraction radiation (CDR) that is produced as a charged particle beam interacts with a solid foil or an aperture. Recent simulation results show that the profile of a THz image of the point spread function (PSF) of a beam whose radius is less than the image produced by a single electron, is sensitive to bunch length and can thus be used as a diagnostic. The advantages of near (source) field imaging over far field imaging are examined and the results of recent high energy (20 GeV) CDR THz experiments at SLAC/FACET are presented. Plans for experiments to further validate and compare these imaging methods for both moderate and high energy charged particle beams are discussed.

Item Type: Conference or Workshop Item (Unspecified)
Depositing User: Symplectic Admin
Date Deposited: 20 Sep 2019 12:59
Last Modified: 19 Jan 2023 00:26
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