28-ID-2 External Website

Beamline 28-ID-2

  • General Information
    • Source Type
      Damping Wiggler 1.8T Ec = 11keV


      General User Beamtime

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

      Energy Range
      30-70 keV

      Beamline Type
      Facility Beamline

      Beamline Description
      XPD is designed to operate two independent branch lines simultaneously. In the main branch (XPD-2), the upstream endstation hosts a three-circle diffractometer fitted with a flat scintillator panel (16-inch field of view, 200 micron pixels) detector, a 10x15mm2 photon-counting detector (130 micron pixels) and a high-resolution detector bank (8 channels with analyzer crystals) to cover most powder diffraction measurements. A robotic sample changer and a wide range of sample cells (furnaces, cryostats, flow cells, etc.) are available. The downstream endstation of XPD-2 (not in use yet) will accommodate more elaborate/complex setups: large pressure cells, non-routine reaction chambers, combined spectrometry, gas handling, user-defined specific devices. The XPD-1 side station (not in use yet) will operate at fixed high energies (39, 64 or 75 keV), optimized for total scattering measurements over a large Q range. The combination of XPD-1 with this XPD-2 complementary parallel-operation station dedicated to high-Q, pair distribution function studies will permit determination of both long- and short-range structures.

      X-ray Diffraction, Powder
      X-ray Scattering, Small- and Wide-angle
      X-ray Total Scattering

      Research Types
      XPD addresses future scientific challenges in, for example, hydrogen storage, CO2 sequestration, advanced structural ceramics, catalysis, and materials processing.

  • 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.
      Eric Dooryhee, Brookhaven National Laboratory, edooryhee@bnl.gov, 344-2409
      Sanjit Ghose, Brookhaven National Laboratory, sghose@bnl.gov, 344-3611

      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.
      A M Abeykoon, Brookhaven National Laboratory, aabeykoon@bnl.gov, 344-2663

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

      Beamline Phone

  • Instrumentation
    • Beamline Characteristics

      Energy RangeMono Crystal or GratingResolution (ΔE/E)FluxSpot Size (mm)Total Angular Acceptance (mrad)
      30-70 keV Laue Si(111) 0.1% high flux mode, 0.02% high resolution mode 6 x 10^13 photons/sec 0.6 - 2.0 mm (horiz) x 0.05 - 2.0 mm (vert) 1.1 mrad (horiz) x 0.1 mrad (vert)

      Source Type
      Damping Wiggler 1.8T Ec = 11keV

      Optical System
      1) Laue-Laue monochromator for beam color selection with a 0.1% energy bandwidth and sagittal focusing 2) Coated mirror for vertical focusing/collimation 3) Channel-cut monochromator with a narrower energy bandwidth for high resolution powder diffraction

      Experimental Apparatus
      1) a 3-circles diffractometer 2) a Flat Panel detector for 2D diffraction 3) a Pixel Array Detector 4) a multi-channel analyzer system 5) a suite of sample environments for in situ diffraction

      Computer System Hardware & Software
      Techniques: powder diffraction, total scattering (PDF), small/medium angle scattering (SAXS, MAXS), tomography (CT). Opportunities for in-­situ and in-­operando structural science (variety of sample environments, functional materials in working conditions or in operating devices).

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