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X18B External Homepage

Beamline X18B

General Information

Source Type
Bending Magnet

Status
Operational

General User Beamtime
50%

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

Energy Range
4.8-40 keV

Beamline Type
Facility Beamline

Technique(s)
X-ray absorption spectroscopy
X-ray absorption spectroscopy, extended fine structure
X-ray absorption spectroscopy, fine structure
X-ray absorption spectroscopy, near edge fine structure
X-ray absorption spectroscopy, near edge structure

Institution(s)
Brookhaven National Laboratory Chemistry
Brookhaven National Laboratory Electrochemistry
NSLS
ORNL
UOP LLC
University of Deleware
Yeshiva University

Research Types
X-ray absorption spectroscopy: EXAFS and XANES in biology, chemistry, physics, geology and environmental sciences

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.
Syed Khalid, Brookhaven National Laboratory, khalid@bnl.gov, 344-7496
Nebojsa Marinkovic, University of Delaware, marinkov@bnl.gov, 6313443808

Beamtime Scheduler The beamline staff member responsible for coordination of beamline schedule every trimester. Contact for questions about beamtime scheduling.
Syed Khalid, Brookhaven National Laboratory, khalid@bnl.gov, 344-7496

Beamline Phone
631-344-5718

Instrumentation

Beamline Characteristics

Energy Range Mono Crystal or Grating Resolution (ΔE/E) Flux Spot Size (mm) Total Angular Acceptance (mrad)
4.7 – 40 keV Si(111) 2 x 10-4 1.0 x 1010 ph/sec (@ 8 keV) 25.0H x 1.5V 1.0

Source Type
Bending magnet

Optical System
Monochromator: Si(111) channel cut monochromator with detuning and some deglitching capabilities. Beam walk < few microns during typical scan. Monochromator in ultra high vacuum 18 m from the source. Sample at ~20 m from the source.0.1,0.2,0.3,0.5,1.0 and 1.5 mm vertical slits at ~17 m from the source.

Experimental Apparatus
Radiation hutch with exhaust system for toxic emissions; ion chambers; fluorescence detectors(PIPS, Lytle and 13-element Ge detector); multi-channel analyzer; x-y stage sample positioner.

Computer System Hardware & Software
1 GHz Pentium to run the beamline and data collection. CAMAC and GPIB interface with Lab View for programming. Another Pentium with FEFFIT, Athena, Artemis WinXAS and BAN for data analysis. 100 MB iomega Zip drives, CD burners and Laser printers etc.

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