TY - CPAPER
AU - Emma, C.
AU - Ding, Y.
AU - Huang, Z.
AU - Lutman, A.A.
AU - Marcus, G.
AU - Marinelli, A.
AU - Pellegrini, C.
TI - Femtosecond X-ray Pulse Generation with an Energy Chirped Electron Beam
J2 - Proc. of FEL2015
AB - We study the generation of short (sub 10 fs) pulses in the X-ray spectral region using an energy chirped electron beam in a Self Amplified Spontaneous Emission Free Electron Laser (SASE FEL) and a self-seeding monochromator [1]-[2]. The monochromator filters a small bandwidth, short duration pulse from the frequency chirped SASE spectrum. This pulse is used to seed a small fraction of the long chirped beam, hence a short pulse with narrow bandwidth is amplified in the following undulators. We present start-to-end simulation results for LCLS operating in the soft X-ray self-seeded mode with an energy chirp of 1% over 30 fs and a bunch charge of 150pC. We demonstrate the potential to generate ~5 fs pulses with a bandwidth ~0.3eV. We also assess the possibility of further shortening the pulse by utilizing one more chicane after the self-seeding stage and shifting the radiation pulse to a 'fresh' part of the electron beam. Experimental study on this short pulse seeding mode has been planned at the LCLS.
PB - JACoW
CY - Geneva, Switzerland
SP - 722
EP - 725
KW - electron
KW - radiation
KW - undulator
KW - simulation
KW - FEL
DA - 2015/12
PY - 2015
SN - 978-3-95450-134-2
DO - 10.18429/JACoW-FEL2015-WEP075
UR - http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/wep075.pdf
ER -