Coherent acoustic phonons have been observed in the X-ray diffraction of a
laser-excited InSb crystal. Modeling based on time-dependent dynamical diff
raction theory has allowed the extraction of fundamental constants, such as
the electron-acoustic phonon coupling time. A dedicated beamline for time-
resolved studies has been developed at the Advanced Light Source with speci
al considerations toward high transmission, low scattering and a wide photo
n energy range. The facility combines a bend magnet beamline, time-resolved
detectors and a femtosecond laser system. (C) 2001 Elsevier Science B.V. A
ll rights reserved.