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Beamline X27A at the National Synchrotron Light Source is a state-of-the-art
hard x-ray microprobe facility. The synchrotron light from the NSLS 2.8 GeV
x-ray storage ring is first apertured using an in-vacuum water-cooled four-jaw slit assembly.
Channel cut double-crystal monochromators [ silicon (111) and silicon (311) ]
are used to select the energy of interest (3.8 keV to 32 keV) , or the light can be allowed to pass
'unfiltered'
into the experimental hutch.
Two 20 cm long rhodium-coated mirrors that are bent into an ellipse, focus
the x-rays in the vertical and horizontal directions at a distance from the end
of the last mirror of 11 cm. The size of the x-ray focus (fwhm) is ~ 6 µm x
18 µm.
The fluorescence photons are collected by a 13-element liquid-nitrogen cooled
high-purity germanium detector.
The major scientific program at X27A is to apply fluorescence x-ray
micro-analytical techniques in the areas of environmental science, chemistry,
physics, biology, nanoscience and geology.
Contact Information
Dr. James M. Ablett.
Brookhaven National Laboratory
National Synchrotron Light Source
Upton, New York, 11973
USA
Telephone
631-344-4435 (office), 631-344-5738
/ 631-344-5514 (beamline), 631-344-3238
(fax)
Postal address
Beamline X27A, Brookhaven National Laboratory, National Synchrotron Light Source, Upton, New York, 11973
General Information: jablett@bnl.gov
Webmaster: jablett@bnl.gov
