X-ray Pulse Length Characterization using the Surface Magneto Optic Kerr Effect

Conference · Wed Oct 04 00:00:00 EDT 2006

OSTI ID:892971

Krejcik, P

It will be challenging to measure the temporal profile of the hard X-ray SASE beam independently from the electron beam in the LCLS and other 4th generation light sources. A fast interaction mechanism is needed that can be probed by an ultrafast laser pulse in a pump-probe experiment. It is proposed to exploit the rotation in polarization of light reflected from a thin magnetized film, known as the surface magneto optic Kerr effect (SMOKE), to witness the absorption of the x-ray pulse in the thin film. The change in spin orbit coupling induced by the x-ray pulse occurs on the subfemtosecond time scale and changes the polarization of the probe beam. The limitation to the technique lies with the bandwidth of the probe laser pulse and how short the optical pulse can be made. The SMOKE mechanism will be described and the choices of materials for use with 1.5 {angstrom} x-rays. A schematic description of the pump-probe geometry for x-ray diagnosis is also described.

• Research Organization: Stanford Linear Accelerator Center (SLAC)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 892971
• Report Number(s): SLAC-PUB-11946
• Conference Information: Presented at 37th ICFA Advanced Beam Dynamics Workshop on Future Light Sources, Hamburg, Germany, 15-19 May 2006
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAM DYNAMICS
BEAM PROFILES
BEAM SHAPING
DIAGNOSTIC TECHNIQUES
ELECTRON BEAMS
KERR EFFECT
LIGHT SOURCES
Other
SYNCHRAD
XFEL
POLARIZATION
X RADIATION