Beamline 7.3.3

Micro X-Ray Diffraction, Micro X-Ray Absorption Spectroscopy

Operational	1998
Source characteristics	Bend magnet
Energy range	See endstation tables
Monochromator	See endstation tables
Endstations	Micro x-ray diffraction/micro x-ray absorption Femtosecond laser-driven x-ray diffraction and absorption

Endstation identifier	Micro x-ray diffraction/micro x-ray absorption
Characteristics	Designed for microprobe, white light, and monochromatic experiments
Energy range	4 - 12 keV
Monochromator	White light and monochromatic [Four-crystal Ge (111)]
Calculated flux (1.9 GeV, 400 mA)	Monochromatic (8.5 keV): 1x10⁹ photons/sec/µm²/3x10^-4BW (1x1 µm spot) 1x10¹² photons/sec/3x10^-4BW (100x300 µm spot)
Resolving power (E/DE)	3500 at 8.5 keV (monochromatic)
Spot size at sample	100 x 300 µm down to 1 x 1 µm
Detectors	X-ray CCD, fluorescence SiLi detector
Samples
Format	Typically less than 1 cm² x 1 mm thick
Sample environment	Typically air
Scientific applications	Measurement of strain, micro-XAS, environmental science
Local contact/spokesperson	Name: A.A. MacDowell Affiliation: Advanced Light Source, Berkeley Lab Phone: (510) 486-4276 Fax: (510) 486-7696 Email: aamacdowell@grace.lbl.gov

Endstation identifier	Femtosecond laser-driven x-ray diffraction
Characteristics	Designed for time-resolved x-ray diffraction and absorption
Energy range	0.1 - 12 keV
Monochromator	White light and monochromatic, with various monochromatizing elements
Flux (1.9 GeV, 400 mA)	~1 x 10¹² photons/sec/3 x 10^-4BW
Resolving power (E/DE)	Dependent on monochromatizing element
Spot size at sample	50 x 300 µm
Detectors	Femtosecond streak camera
Samples
Format	Typically less than 1 cm² x 1 mm thick
Sample environment	Typically 10^-5 Torr vacuum
Scientific applications	Sub-picosecond diffraction/absorption
Local contact/spokesperson	Name: Phil Heimann Affiliation: Advanced Light Source, Berkeley Lab Phone: (510) 486-7628 Fax: (510) 486-7696 Email: paheimann@lbl.gov