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X12B External Homepage

Beamline X12B

General Information

Source Type
Bending Magnet

Status
Operational

General User Beamtime
25%

Energy Range
5-20 keV

Beamline Type
Participating Research Team (PRT)

Technique(s)
Multi wavelength anomalous diffraction
Macromolecular crystallography

Institution(s)
Brookhaven National Laboratory, Biology Dept.

Research Types
Macromolecular crystallography, multi-wavelength anomalous dispersion, mail-in and remote participation crystallography.

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.
Dieter Schneider, Brookhaven National Laboratory, schneider@bnl.gov, 344-3423
Alexei Soares, Brookhaven National Laboratory, soares@bnl.gov, 344-7306

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.
Dieter Schneider, Brookhaven National Laboratory, schneider@bnl.gov, 344-3423
Alexei Soares, Brookhaven National Laboratory, soares@bnl.gov, 344-7306

Beamtime Scheduler The beamline staff member responsible for coordination of beamline schedule every trimester. Contact for questions about beamtime scheduling.
Alexei Soares, Brookhaven National Laboratory, soares@bnl.gov, 344-7306

Beamline Phone
631-344-5712

Instrumentation

Beamline Characteristics

Energy Range Mono Crystal or Grating Resolution (ΔE/E) Flux Spot Size (mm) Total Angular Acceptance (mrad)
5 – 20 keV Si(111) 8 x 10-4 ~2 x 1010 ph/sec 0.5H x 0.3V variable to 2

Source Type
Bending magnet

Optical System
The X12B beamline optics consist of a vertically collimating mirror (that is shared with X12C) followed by a channel-cut Si(111) crystal monochromator and a doubly focusing toroidal mirror.

Experimental Apparatus
The X12B endstation contains an ADSC Q4 CCD x-ray area detector mounted on a two-circle diffractometer, and an Oxford Cryosystems 700 series cryostream system for sample freezing. A custom-manufactured automatic sample mounter has recently been added.

Computer System Hardware & Software
Networked array of Linux PCs. CBASS data collection software, HKL2000 data analysis software.

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