EXPERIMENTAL STATION 11-2

CURRENT STATUS:	Open
SUPPORTED TECHNIQUES:	X-ray absorption spectroscopy Grazing incidence x-ray absorption spectroscopy
MAIN SCIENTIFIC DISCIPLINES:	Molecular Environmental and Interface Science (see also: BL11-2 User Support)
% TIME GENERAL USE:	100%
SCHEDULING:	Proposal Submittal and Scheduling Procedures Current SPEAR and Beam Line Schedules
SOURCE:	26-pole, 2.0-Tesla Wiggler ID End Station
BEAM LINE SPECIFICATIONS:   energy range resolution DE/E spot size flux angular acceptance focused 4500 - 21000 eV ~1 x 10-4 0.5 x 3.0 mm   1.5 mrad unfocused 4500 - 37000 eV ~10-4 3.0 x 30.0 mm   ~0.9 mrad Collimated 4500 - 20000 eV ~1 x 10-4 2.0x 30.0 mm   ~0.9 mrad
OPTICS:	M0: Bent flat Si M1: Bent cylindrical Si
MONOCHROMATOR:	LN2-cooled monochromator Si(220), Phi=0 or 90 degrees Monochromator Crystal Glitch Library Crystal changes need to be scheduled and coordinated in advance with BL support staff.
ABSORPTION:
INSTRUMENTATION:	30-element Ge solid state Detector Array LHe cryostat Grazing incidence XAS instrument
DATA ACQUISITION AND ANALYSIS	XAS Collect, Super and Six PACK X-ray Data Booklet
RESPONSIBLE STAFF:	John Bargar, 650-926-4949, cell 650-284-9573 Matthew Latimer, 650-4944
BEAM LINE PHONE NUMBER	650-926-8650 On-site Users: Contact the Duty Operator at 9-926-4040
GENERAL DESCRIPTION	Beam Line 11-2 is a high-flux XAS station dedicated to molecular biogeochemical and interface sciences. It is optimized for challenging XAS measurements on dilute or radioactive samples, single crystals, and interfaces. To support these experiments, Beam Line 11-2 is equipped with collimating and focusing optics, a "double double" Si(220) LN-cooled monochromator, and a 30-element solid state Ge detector array. Additional instrumentation includes LHe and LN cryostats, a grazing incidence XAS spectrometer, and HEPA-filtered controlled exhaust systems that are continuously monitored to detect the presence of air-born radioactivity. It has an adjacent sample preparation room for handling and temporary storage of radioactive samples, most of which are related to the DOE's energy and national security missions.
Sample Preparation Labs:	The SSRL Structural Molecular Biology (SMB) Sample Preparation Laboratories are available to users by prearrangement. To use a laboratory, users must complete laboratory training, and provide a list of all chemicals to be brought, used or stored in the Sample Preparation Laboratory. For details, contact Cynthia Patty (650-926-3925).
SCIENTIFIC APPLICATIONS / SELECTED RESULTS	January 2009: The Competition for Iron Impacts the Global Carbon Cycle July 2007: A Surprising Behavior of Yttrium Impurities June 2007: Understanding Arsenic March 2007: Rare Minerals Illuminate 17,000-year old Questions November 2006: A Uranium Dilemma October 2006: In Situ Biological Uranium Remediation within a Highly Contaminated Aquifer September 2006: X-ray Science Saves Taxpayers Billions in Radioactive Cleanup September 2006: SSRL and Rocky Flats Plutonium Remediation September 2006: Effect of Local Coordination in the Photoluminescence Properties of Er-doped Y2O3 Thin Films June 2005: Geological and Anthropogenic Factors Influencing Mercury Speciation in Mine Wastes October 2004: Investigations to Identify the Soluble, Non-pertechnetate Species in the High-level Nuclear Waste at the Hanford Site November 2003: Remediation of Uranium-contaminated Water at Fry Canyon, Utah
ENGINEERING NOTES	http://www-ssrl.slac.stanford.edu/safety/ beamlines/bl11/

SSRL | Beamlines | User Admin | Safety

Last Updated:	28 JAN 2011
Content Owner:	John Bargar
Page Editor:	Nikola Stojanovic