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TY - CONF AU - Aftab, N. AU - Aboulbanine, Z. AU - Boonpornprasert, P. AU - Georgiev, G.Z. AU - Good, J. AU - Groß, M. AU - Hillert, W. AU - Hoffmann, A. AU - Krasilnikov, M. AU - Li, X.-K. AU - Lueangaramwong, A. AU - Niemczyk, R. AU - Oppelt, A. AU - Qian, H.J. AU - Reader, A.J. AU - Richard, C.J. AU - Stephan, F. AU - Vashchenko, G. ED - Forck, Peter ED - Wawrzyniak, Adriana ED - Schaa, Volker R.W. ED - Kowalski, Grzegorz W. ED - Cudek, Agnieszka (SOLARIS, Kraków TI - Improvements in Longitudinal Phase Space Tomography at PITZ J2 - Proc. of IBIC2022, Kraków, Poland, 11-15 September 2022 CY - Kraków, Poland T2 - International Beam Instrumentation Conference T3 - 11 LA - english AB - Methodical studies to improve the longitudinal phase space (LPS) tomography of space-charge dominated electron beams were carried out at the Photo Injector Test facility at DESY in Zeuthen (PITZ). An analytical model was developed to quantify mean momentum, RMS energy spread, bunch length and phase advance. Phase advance analysis determined the booster phase scan range and step size to be used for obtaining momentum projections. A slit was introduced before the booster to truncate the beam in transverse plane to strongly reduce the space charge effects. The signal resolution of this truncated beam was improved by careful beta function control at the reference screen of the momentum measurements. The reconstruction algorithm was changed from Algebraic Reconstruction Technique (ART) to Image Space Reconstruction Algorithm (ISRA) owing to its assurance of non-negative solutions. In addition, the initial physically justified assumption of LPS, based on low-energy section measurements, was established to clear out noise-like artefacts. This paper will highlight the improvements made in the LPS tomography and compare the simulated and experimental results. PB - JACoW Publishing CP - Geneva, Switzerland SP - 105 EP - 108 KW - booster KW - electron KW - experiment KW - space-charge KW - gun DA - 2022/12 PY - 2022 SN - 2673-5350 SN - 978-3-95450-241-7 DO - doi:10.18429/JACoW-IBIC2022-MOP28 UR - https://jacow.org/ibic2022/papers/mop28.pdf ER -