Contribution to a conference proceedings

PUBDB-2026-03098

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png 4D transverse coupling measurements of an 18 MeV photo-injector electron beam at PITZ

Richard, C. J. (Corresponding author)DESY* ; Aftab, N.DESY* ; Amirkhanyan, Z. G.Extern*DESY* ; Aksoy, A.Extern*DESY* ; Good, J. D.DESY* ; Gross, M.DESY* ; Krasilnikov, M.DESY* ; Li, X.DESY* ; Oppelt, A.DESY* ; Pakluea, S.Extern*DESY* ; Stephan, F.DESY* ; Vashchenko, G.DESY* ; Xu, D.Extern* ; Zeeshan, S.DESY*

2026

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Please use a persistent id in citations: doi:10.18429/JACoW-LINAC2026-THPO010

Abstract: At the Photo-Injector Test facility at DESY in Zeuthen (PITZ), the horizontal and vertical phase spaces of electron beams are measured to characterize the performance of L- band photo-electron sources. These measurements are taken using the slit-screen method located 5.27 m downstream of the photo-cathode after acceleration to 18 MeV by a 14-cell booster cavity. The beamlet images from x and y plane slit scans can then be combined using a Virtual Pepper Pot (VPP) to reconstruct the full 4D transverse phase space. This technique has enabled detailed characterization of the x-y coupling originating from the electron source. Notably, the VPP analysis shows the x-y coupling is not uniform across the entire beam, instead one corner is significantly more coupled than the rest of the beam. While the cause of this effect is still under investigation, it can be reduced using a skew quadrupole near the exit of the gun.

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Contributing Institute(s):

1. Technologie (Z_PITZ)

Research Program(s):

1. 621 - Accelerator Research and Development (POF4-621) (POF4-621)

Experiment(s):

1. Photo Injector Test Facility

Appears in the scientific report 2026

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