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

Journal Article · Wed Mar 04 04:00:00 EST 2009 · Submitted to Phys. Rev. ST Accel. Beams

DOI:https://doi.org/10.1103/PhysRevSTAB.12.060703· OSTI ID:948832

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 using extremely short laser pulses to manipulate the electron bunches have been proposed. In this paper, we extend the attosecond two-color ESASE scheme proposed by Zholents et al. to the long optical cycle regime using a second detuned laser and a tapered undulator. Both lasers can be about ten-optical-cycles long, with the second laser frequency detuned from the first 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 peaks. Simulations using the LCLS parameters show a single attosecond x-ray spike of {approx} 110 attoseconds can be produced. The second laser can also be detuned to coherently control the number of the side x-ray spikes and the length of the radiation pulse.

• Research Organization: Stanford Linear Accelerator Center (SLAC)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 948832
• Report Number(s): SLAC-PUB-13545
• Journal Information: Submitted to Phys. Rev. ST Accel. Beams, Journal Name: Submitted to Phys. Rev. ST Accel. Beams
• Country of Publication: United States
• Language: English

Related Subjects

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