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Beamline X25

General Information

Source Type
Insertion Device

Status
Operational

General User Beamtime
50%

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

Energy Range
5-20 keV

Beamline Type
Facility Beamline

Technique(s)
Multi wavelength anomalous diffraction
Macromolecular crystallography

Institution(s)
Brookhaven National Laboratory - Biology Dept.
NSLS

Research Types
High intensity, high brightness photon beam, high q-resolution 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.
Lonny Berman, Brookhaven National Laboratory, berman@bnl.gov, 344-5333
Robert Sweet, Brookhaven National Laboratory, rsweet@bnl.gov, 344-3401

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.
Annie Heroux, Brookhaven National Laboratory, heroux@bnl.gov, 344-4454
Anand Saxena, Brookhaven National Laboratory, asaxena@bnl.gov, 344-4844

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
631-344-5625

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) 1 x 10-3 - 1 x 10-4 2.4 x 1011 ph/sec (@ 1.1 , 180 mA, 2.8 GeV, 0.1 mm aperture) 0.25 mm H x 0.125 mm V 0.4 mrad H x 0.1 mrad V from undulator

Source Type
55-period in-vacuum hybrid undulator (18 mm period)

Optical System
Monochromator: Double silicon(111) crystal monochromator with cryogenically-cooled first crystal and sagittally-bent second crystal horizontally-focusing at 3.3:1 demagnification.

Mirror: Meridionally-bent fused silica mirror with palladium and uncoated stripes vertically-focusing at 6.6:1 demagnification.

Experimental Apparatus
Crystal Logic micro-diffractometer; ADSC Q315 CCD x-ray detector; Oxford Cryosystems cryostream for freezing samples.

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

Links