Photon Sciences   |   Brookhaven National Laboratory

Beamline X15B

  • General Information

    • Source Type
      Bending magnet

      Status
      Operational

      General User Beamtime
      50%

      Energy Range Category
      Hard X-Ray (1-50 keV)

      Energy Range
      1.2-8 keV, standard 2-5

      Beamline Type
      Participating Research Team (PRT)

      Technique(s)
      X-ray absorption spectroscopy
      X-ray absorption spectroscopy, extended fine structure
      X-ray absorption spectroscopy, fine structure
      X-ray absorption spectroscopy, near edge fine structure
      X-ray absorption spectroscopy, near edge structure

      Institution(s)
      Corning, Inc.
      Georgia Institute of Technology
      Lawrence Berkeley National Laboratory
      Lucent Technologies, Inc.
      Miami University
      Naval Research Laboratory (NRL)
      North Carolina State University
      Princeton University
      SUNY @ Stony Brook
      University of Delaware
      Woods Hole Oceanographic Institute

      Research Types
      Environ. interfaces, contam. transport/speciation, carbonate/high-press. minerals, atmos. particles; photovoltaics, fuel-cells, CO2-sequestration; Paleo-ocean chem., biomass/fuel productivity/ sustainability, nutrient transport/bioavailability, C cycling
  • Contact Information

    • Spokesperson The person from each beamline who acts as a contact point between the beamline management and NSLS administration. Contact for questions about the beamline scientific program, experimental capabilities, and beamline management.
      Paul Northrup, SUNY @ Stony Brook, northrup@bnl.gov, 6313443565

      Local Contact The beamline staff member who is typically responsible for overseeing the daily operation and maintenance of the beamline. Contact for questions about beamline instrumentation, experimental details, and training.
      Paul Northrup, SUNY @ Stony Brook, northrup@bnl.gov, 6313443565

      Beamtime Scheduler The beamline staff member responsible for coordination of beamline schedule every trimester. Contact for questions about beamtime scheduling.
      Paul Northrup, SUNY @ Stony Brook, northrup@bnl.gov, 6313443565

      Beamline Phone
      631-344-5715

  • Instrumentation

    • Beamline Characteristics

      Energy RangeMono Crystal or GratingResolution (ΔE/E)FluxSpot Size (mm)Total Angular Acceptance (mrad)
      1.2 to 8 keV (2-5 standard) Si(111), Ge(111), Si(311), InSb, Beryl 2 x 10-4 for Si(111) ~1 x 1012 ph/sec (@ 250 mA, 2.8 GeV, 4keV) <1H x 1V (@ less than 4 keV) 5

      Source Type
      Bending magnet

      Optical System
      Mirror 1: Cylindrical platinum coated Glidcop; 1m long; cooled; vertically collimating; incidence angle can be adjusted (0.2 deg. to 2.0 deg. range) to discriminate against harmonics; located 8 meters from the source. Monochromator: Double flat crytal UHV monochromator with fixed-exit geometry; first crystal is cooled; Bragg angle range from 10 deg. to 80 deg.; located 10 meters from the source. Crystal pairs include Si(111), Ge(111), Si(311), InSb, Beryl. Energy resolution is determined by crystals. Energy repeatability is within 0.1 eV scan-to-scan and over 24+ hours. Mirror 2: 1:1 focusing platinum coated ULE (silica) toroid; 0.4 degree incidence angle; 1m long.

      Experimental Apparatus
      A small Hutch Box, with air or He atmosphere, is equipped with a Ge fluorescence detector, ion chambers, and sample stage. Operating range is 1.2-8 keV. Stage has accommodations for solution flow and electrochemistry cells, and grazing-incidence geometries. An ultra-high vacuum chamber is available for use by highly-qualified users under supervision of beamline personnel. Contact Spokesperson for specifications. An independent end station supplied by the General User and approved by the Spokesperson may be installed downstream of the existing UHV chamber.

      Computer System Hardware & Software
      PC386 and Pentium computers with Windows 95, floppy, Jaz and Zip drives; associated software and graphics. Export of text formats for users.

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