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Beamline X18A

General Information

Source Type
Bending Magnet

Status
Operational

General User Beamtime
50%

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

Energy Range
5-25 keV

Beamline Type
Facility Beamline

Technique(s)
X-ray diffraction, powder
X-ray diffraction, single crystal
X-ray diffraction, surface
X-ray diffraction, wide angle
X-ray reflectivity
X-ray scattering, surface
X-ray scattering, wide angle
X-ray absorption spectroscopy

Institution(s)
BNL - Chemistry
BNL - Chemistry
BNL - Electrochemistry
BNL - NSLS
Oak Ridge National Laboratory
UOP LLC
University of Delaware
University of Massachusetts
University of Massachusetts - Dept. of Chemistry
Yeshiva University

Research Types
Wide angle and surface scattering. X-ray absorption spectroscopy: EXAFS and XANES .

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

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

Beamtime Scheduler The beamline staff member responsible for coordination of beamline schedule every trimester. Contact for questions about beamtime scheduling.
Steven Ehrlich, Brookhaven National Laboratory, ehrlich@bnl.gov, 344-7862

Beamline Phone
631-344-5618

Instrumentation

Beamline Characteristics

Energy Range Mono Crystal or Grating Resolution (ΔE/E) Flux Spot Size (mm) Total Angular Acceptance (mrad)
~5-25 keV Si(111) ~5 x 10-4 1010 - 1011 ph/sec (@ 10 keV, 50 mA, 2.5 GeV) 1.0H x 0.5V (focused) 6

Source Type
Bending magnet

Optical System
Monochromator: Si(111) channel cut monochromator with detuning ; located 10.117 meters from the source.

Mirror: Cylindrical, rhodium-coated aluminum 1:1 focusing mirror and mirror bender; 700 mm long x 100 mm wide; high energy cutoff is ~25 keV; located 11.75 meters from the source.

Experimental Apparatus
Radiation hutch; six circle Huber diffractometer; NaI scintillation detectors; ionization chambers; Si(Li) detector; avalanche photodiode detector; CTI cryostat, heating stage (available only by special arrangement with the PRT)

Computer System Hardware & Software
Linux-based personal computer for data acquisition, running EPICS and SPEC; VME crate; GPIB interfaced temperature controller and digital multimeter.

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