Reflection of attosecond x-ray free electron laser pulses

Journal Article · Mon Oct 30 04:00:00 EST 2006 · Review of Scientific Instruments, vol. 78, N/A, January 10, 2007, pp. 013104

OSTI ID:900186

Hau-Riege, S; Chapman, H

In order to utilize hard x-ray free electron lasers (XFEL's) when they are extended to attosecond pulse lengths, it is necessary to choose optical elements with minimal response time. Specular grazing incidence optics made of low-Z materials are popular candidates for reflectors since they are likely to withstand x-ray damage and provide sufficiently large reflectivities. Using linear-optics reflection theory, we calculated the transient reflectivity of a delta-function electric pulse from a homogeneous semi-infinite medium as a function of angle of incidence for s- and p-polarized light. We specifically considered the pulse response of Be, diamond, silicon carbide, and silicon, all of which are of relevance to the XFEL's that are currently being built. We found that the media emit energy in a damped oscillatory way, and that the impulse-response times are shorter than 0.3 fs for normal incidence. For grazing incidence, the impulse-response time is substantially shorter, making grazing-incidence mirrors a good choice for deep-sub-femtosecond reflective optics.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 900186
• Report Number(s): UCRL-JRNL-226114
• Journal Information: Review of Scientific Instruments, vol. 78, N/A, January 10, 2007, pp. 013104, Journal Name: Review of Scientific Instruments, vol. 78, N/A, January 10, 2007, pp. 013104
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DELTA FUNCTION
FREE ELECTRON LASERS
INCIDENCE ANGLE
MIRRORS
OPTICS
PULSES
REFLECTION
REFLECTIVITY
SILICON
SILICON CARBIDES
TRANSIENTS