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Mainz 2022 – scientific programme

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 13: Diagnostics, Control and Instrumentation 2

AKBP 13.4: Talk

Thursday, March 31, 2022, 14:45–15:00, AKBP-H13

Longitudinal phase space (LPS) characterization of high brightness electron beams at PITZ — •Namra Aftab1, Zakaria Aboulbanine1, Gowri Adhikari1, Prach Boonpornprasert1, Maria-Elena Castro-Carballo1, Georgi Georgiev1, James Good1, Matthias Gross1, Andreas Hoffmann1, Christian Koschitzki1, Mikhail Krasilnikov1, Xiangkun Li1, Osip Lishilin1, Anusorn Lueangaramwong1, David Melkumyan1, Raffael Niemczyk1, Anne Oppelt1, Houjun Qian1, Frank Stephan1, Grygorri Vashchenko1, Tobias Weilbach1, and Wolfgang Hillert21DESY, Zeuthen, Germany — 2University of Hamburg, Germany

Methodological studies to improve the LPS tomography of space-charge dominated electron beams were carried out at the Photo Injector Test facility at DESY in Zeuthen (PITZ). In the experimental procedure, initially, a 200 μm-wide horizontal slit was introduced before the booster to cut the beam to strongly reduce space charge effects. Next, the signal resolution of this truncated beam was improved by careful beta function control at the reference screen of momentum measurements. A combination of both steps enabled accurate measurement of minimum energy spread and better control of beam phase advance during booster phase scan, i.e. control of booster amplitude and phase scan range. After optimization of the experimental conditions, the momentum projections were fed to a tomographic reconstruction algorithm to obtain the reconstructed LPS. Finally, the noisy artifacts in LPS were addressed to further improve the results.

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