EXPERIMENTAL STATION 7-3

CURRENT STATUS:	Open
SUPPORTED TECHNIQUES:	X-ray absorption spectroscopy
MAIN SCIENTIFIC DISCIPLINES:	Structural Biology
% TIME GENERAL USE:	100%
SCHEDULING:	see Proposal Submittal and Scheduling Procedures
SOURCE:	20-pole, 2-Tesla wiggler, 0.8 mrad beam
BEAM LINE SPECIFICATIONS:   energy range grating type resolution DE/E spot size (fwhm) flux* angular acceptance unfocused 4600-37000 eV Si(220) 1 x 10-4 2 x 15 mm2 ~2 x 1012 0.8 mrad *ph/sec @100 mA / 9 keV w 1x4 mm aperture
OPTICS:	M0 mirror: Flat, bent, vertically collimating, 1 m, Si, Rh-coated, LN2-cooled                 monochromator
MONOCHROMATOR:	Si(220) phi=0°, Si(220) phi=90° double-crystal, non-fixed exit slit
ABSORPTION:	546 microns Be, 16.0 meters He, 15.2 microns C
INSTRUMENTATION:	30-element Ge detector array LHe cryostat (4-200 K) Ion chambers, PIPS detector
DATA ACQUISITION AND ANALYSIS:	Data acquisition: XAS-Collect Data analysis: EXAFSPAK
RESPONSIBLE STAFF:	Matthew Latimer, 650-926-4944 (office), 650-714-9416 (cell) Allyson Aranda, 650-926-3938 (office), 650-714-9415 (cell) Erik Nelson, 650-926-5103 (office), 650-714-9407 (cell) Serena DeBeer George, 650-926-4674 (office)
BEAM LINE PHONE NUMBER:	650-926-5273
GENERAL DESCRIPTION:	BL7-3 is dedicated to biological x-ray absorption spectroscopy. Being an unfocused beam line, the main focus of experiments is on XAS of very dilute (micro molar) solutions of metalloproteins
SCIENTIFIC APPLICATIONS / SELECTED RESULTS:	May 2005: The First Cadmium Enzyme - Carbonic Anhydrase 2 from the Marine Diatom Thalassiosira weissflogii August 2004: Understanding the Role of Thiolate Ligation in Nature's Hydroxylating Heme Enzymes March 2008: The Structure of a Reaction Intermediate in Enzymatic Halogenation
ENGINEERING NOTES:	http://www-ssrl.slac.stanford.edu/safety/beamlines/bl7/

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Last Updated:	22 OCT 2007
Content Owner:	Britt Hedman
Page Editor:	Lisa Dunn