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TY - CONF AU - Liu, S. AU - Decking, W. AU - Feng, G. AU - Geloni, G. AU - Kocharyan, V. AU - Serkez, S. AU - Zagorodnov, I. ED - Bishofberger, Kip:Carlsten, Bruce (LANL, Los Alamos, NM, USA)[ORCID:0000-0001-5619-907X] ED - Schaa, Volker RW TI - Longitudinal Phase Space Optimization for the Hard X-ray Self-Seeding J2 - Proc. of FEL2017, Santa Fe, NM, USA, August 20-25, 2017 C1 - Santa Fe, NM, USA T2 - International Free Electron Laser Conference T3 - 38 LA - english AB - For the implementation of Hard X-ray Self-Seeding (HXRSS) at European XFEL, short electron-beam bunches (FWHM ≤ 50 fs) are preferred to mitigate spatio-temperal coupling effect and to fit to the seeding bump width. Therefore, operations with low charges (< 250 pC) are preferred. Longitudinal phase-space optimization has been performed for the 100 pC case by flattening the current distribution. Start-to-end simulations show that, with the optimized distribution, for the photon energy of 14.4 keV, the HXRSS output power, pulse energy and spectral intensity can be increased by a factor of approximately 2 as compared to the nominal working point. PB - JACoW CP - Geneva, Switzerland SP - 259 EP - 262 KW - ion KW - FEL KW - simulation KW - undulator KW - electron DA - 2018/02 PY - 2018 SN - 978-3-95450-179-3 DO - 10.18429/JACoW-FEL2017-TUP004 UR - http://jacow.org/fel2017/papers/tup004.pdf ER -