Generation of attosecond x-ray pulses with a multi-cycle two-color ESASE scheme

Conference · Tue Sep 30 04:00:00 EDT 2008

OSTI ID:939109

Ding, Y; Huang, Z; Ratner, D; Bucksbaum, P; Merdji, H

Generation of attosecond x-ray pulses is attracting much attention within the x-ray free-electron laser (FEL) user community. Several schemes have been proposed based on manipulations of electron bunches with extremely short laser pulses. In this paper, we extend the attosecond two-color ESASE scheme proposed by Zholents et al. to the long optical cycle regime using a detuned second laser and a tapered undulator. Both lasers can be about ten-optical-cycles long, with the second laser frequency detuned from the first one to optimize the contrast between the central and side current spikes. A tapered undulator mitigates the degradation effect of the longitudinal space charge (LSC) force in the undulator and suppresses the FEL gain of all side current spikes. Simulations using the LCLS parameters show a single attosecond x-ray spike of {approx} 110 attosecond can be produced with a good contrast ratio.

• Research Organization: Stanford Linear Accelerator Center (SLAC)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 939109
• Report Number(s): SLAC-PUB-13393
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
Accelerators
Other
ACCPHY
XFEL
ELECTRONS
FREE ELECTRON LASERS
LASERS
SPACE CHARGE
WIGGLER MAGNETS