Beamline X4c

  • General Information
    • Source Type
      Bending magnet

      Status
      Operational

      General User Beamtime
      25%

      Energy Range
      7-20 keV

      Beamline Type
      Participating Research Team (PRT)

      Beamline Description
      Macromolecular crystallography, diffraction measurements of biological macromolecules. This beamline and experimental station, entirely contained within a single radiation enclosure, consists of a vertically focusing mirror followed by a single horizontally diffracting and focusing monochromator crystal. A MarResearch diffractometer equipped with a MAR 165 CCD detector and a MAResearch automated sample changer can move on a translation stage to track the monochromatic beam as the wavelength is scanned. The same biochemical laboratory with walk-in cold room which is available to X4A users is also available to X4C users.

      Technique(s)
      Multi wavelength anomalous diffraction
      Macromolecular crystallography

      Institution(s)
      Albert Einstein College of Medicine
      City University of New York (CUNY)
      Columbia University
      Cornell University
      Icahn School of Medicine at Mount Sinai (ISMMS)
      Memorial Sloan-Kettering Cancer Center
      New York Structural Biology Center
      New York University
      Rockefeller University
      University at Buffalo, SUNY
      Wadsworth Center, New York State Department of Health (USA)

      Research Types
      Macromolecular crystallography, diffraction measurements from biology molecules.

  • 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.
      Wayne Hendrickson, Columbia University, wayne@convex.hhmi.columbia.edu, 212/305-3456

      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.
      Randy Abramowitz, New York Structural Biology Center, randy@bnl.gov, 6313445604

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

      Beamline Phone
      631-344-3726

  • Instrumentation
    • Beamline Characteristics

      Energy RangeMono Crystal or GratingResolution (ΔE/E)FluxSpot Size (mm)Total Angular Acceptance (mrad)
      7 – 20 keV Si(111) ~10-3 ~0.3H x 0.3V variable up to 6

      Source Type
      Bending magnet

      Optical System
      Slits: Variable vertical and horizontal slits. Monochromator: Monochromator system consisting of a horizontally deflecting and focusing crystal preceded by a vertically focusing mirror. Distance from monochromator to sample is variable between 2.5 and 4.5 m. Distance from the monochromator to source is ~10.5 m.

      Experimental Apparatus
      MAR 165 CCD detector on a MAR base. MAR automated sample changer.

      Computer System Hardware & Software
      PC Windows based control program. Data processing on Linux workstation. Data backup on DVDs or convenient connection to Firewire or USB2.0 external drives.

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