Beamline 7-BM

  • General Information
    • Source Type
      3-pole wiggler (3PW)

      Status
      Construction and Commissioning

      General User Beamtime
      0%

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

      Energy Range
      4.7 - 31 keV

      Beamline Type
      Participating Research Team (PRT)

      Beamline Description
      QAS will enable the in situ study of chemical and physical transformations using both quick and conventional x-ray absorption and scattering methods. It will allow measurements using separate and combined XAS and XRD techniques, as well as combining these techniques with those provided by end stations with IR and Raman spectroscopy capabilities, in a variety of sample environments.

      Technique(s)
      X-ray Absorption Spectroscopy
      X-ray Diffraction, Powder

  • 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.
      Steven Ehrlich, Brookhaven National Laboratory, ehrlich@bnl.gov, 344-7862
      Syed Khalid, Brookhaven National Laboratory, khalid@bnl.gov, 344-7496

      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.

      Beamtime Scheduler The beamline staff member responsible for coordination of beamline schedule every trimester. Contact for questions about beamtime scheduling.

      Beamline Phone
      631-344-

  • Instrumentation
    • Beamline Characteristics

      Energy RangeMono Crystal or GratingResolution (ΔE/E)FluxSpot Size (mm)Total Angular Acceptance (mrad)
      4.7 - 31 keV Si(111) channel-cut ΔE/E = 10 -4 up to 10 12 ph/s (10 keV) less than 1.0mm H x 0.5mm V (in focused mode) 2 mrad (H); 0.3 mrad (V)

      Source Type
      3-pole wiggler (3PW)

      Optical System
      A vertical collimating mirror (700mm long) can be switched between two stripes, Rh or Pt. The monochromator can be run in conventional or quick-scan mode and has a Si(111) channel-cut crystal. A toroidal mirror (1000mm long) with Rh coating is used to focus the beam at the sample position.

      Experimental Apparatus
      Detectors include a PerkinElmer 1621 area detector, a Vortex-ME4 4-element Si-drift, a Canberra multi-element Ge, ion chambers and Canberra PIPS. Sample environments include closed-cycle He refrigerators (T > 10K), in-situ Clausen cells (25°C - 700°C), in-situ Nashner-Adler reaction cells (-150°C - 500°C), a large clam shell furnace reactor (25°C - 900°C), an in-situ high P, high T XAS flow cell (T to 600°C and P to 1200 psi (83 bar)) and an in-situ, custom made XAS-DRIFTS cell (25°C - 700°C). End stations add capabilities for doing DRIFTS/XAS and Raman/XAS.

      Computer System Hardware & Software
      Beamline and endstation motions are controlled by EPICS through Linux IOCs. Linux and Windows workstations are used for detector and sample environment control.

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