Author: Sekutowicz, J.K.
Paper Title Page
MOP067 Prospects for CW Operation of the European XFEL in Hard X-ray Regime 210
 
  • R. Brinkmann, E. Schneidmiller, J.K. Sekutowicz, M.V. Yurkov
    DESY, Hamburg, Germany
  
  The Eu­ro­pean XFEL will op­er­ate nom­i­nally at 17.5 GeV in SP (short pulse) mode with 0.65 ms long bunch train and 10 Hz rep­e­ti­tion rate. A pos­si­ble up­grade of the linac to CW (con­tin­u­ous wave) or LP (long pulse) modes with a cor­re­spond­ing re­duc­tion of elec­tron beam en­ergy is under dis­cus­sion since many years. Re­cent suc­cesses in the ded­i­cated R&D pro­gram allow to fore­cast a tech­ni­cal fea­si­bil­ity of such an up­grade in the fore­see­able fu­ture. One of the chal­lenges is to pro­vide sub-Angstroem FEL op­er­a­tion in CW and LP modes. In this paper we per­form a pre­lim­i­nary analy­sis of a pos­si­ble op­er­a­tion of the Eu­ro­pean XFEL in the hard X-ray regime in CW and LP modes with the en­er­gies of 7 GeV and 10 GeV, re­spec­tively. We con­sider las­ing in the base­line XFEL un­du­la­tor as well as in a new un­du­la­tor with a re­duced pe­riod. We show that, with rea­son­able re­quire­ments on elec­tron beam qual­ity, las­ing on the fun­da­men­tal will be pos­si­ble in sub-Angstroem regime. As an op­tion for gen­er­a­tion of bril­liant pho­ton beams at short wave­lengths we also con­sider har­monic las­ing that has re­cently at­tracted a sig­nif­i­cant at­ten­tion.