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Beamline X3B

General Information

Source Type
Bending Magnet

Status
Operational

General User Beamtime
50%

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

Energy Range
3.8-13.3 keV

Beamline Type
Participating Research Team (PRT)

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

Institution(s)
Case Western Reserve University

Research Types
EXAFS, 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.
Mark Chance, Case Western Reserve University, mark.chance@case.edu, 216-368-4406

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.
Jennifer Bohon, Case Western Reserve University, jbohon@bnl.gov, 631/344-4613
Wuxian Shi, Case Western Reserve University, wushi@bnl.gov, 6313442099

Beamtime Scheduler The beamline staff member responsible for coordination of beamline schedule every trimester. Contact for questions about beamtime scheduling.
Jennifer Bohon, Case Western Reserve University, jbohon@bnl.gov, 631/344-4613

Beamline Phone
631-344-5603

Instrumentation

Beamline Characteristics

Energy Range Mono Crystal or Grating Resolution (ΔE/E) Flux Spot Size (mm) Total Angular Acceptance (mrad)
3.8-13.3 keV (SI 111) Sagitally focused Si(111) with an option of Si(220) 3 eV at E = 10 keV 5 x 1011 photons/sec at E = 10 keV and I = 200 mA 0.7 H x 0.2 V (FWHM) 15 mrads; 5 mrads currently used

Source Type
Bending magnet

Optical System
Primary Aperture: 11.2 m from source.

Be Windows: front end: 0.010" thick; 8.6 m from source. Exit window: 0.020" thick.

Monochromator: Double crystal monochromator with fixed exit geometry; Bragg angle range is 8.5 – 35 degrees; sagitally focusing Si(111) second crystal; if requested in advance, flat Si(111) and Si(220) crystals, each 100 mm wide, can be operated side-by-side; high precision rotary energy stage; operates in high vacuum; located 16.5 meters from the source.

Mirror: Nickel coated cylindrically bent mirror for harmonics rejection and vertical focusing (0.3 mm FWHM); independent choice of mirror angle and focal length for variable beam size on sample; located 18.1 meters from the source.

Experimental Apparatus
Radiation hutch located 20 meters from the source; 4 meters long and approximately 3 meters wide. Canberra 13-element Germanium detector. Helium Displex cryostat attached to vacuum chamber (14 Kelvin sample temperature). Computer controlled X-Y Z aperture and X-Y-Z translation stage with additional pitch and roll capability (2000 lbs. load capacity). Four transmission ion chambers with electronics (amplifiers, V/F converters, scalers). Laser alignment system, high-throughput metal screening apparatus.

Computer System Hardware & Software
Beamline control and data acquisition: 3 GHz PC running Windows XP; XDAC Data Acquisition Software with CAMAC, DVD/RW, ethernet connection for FTP data transfer.

Beamline data analysis: 2.66 GHz Core2 Quad PC running Windows XP; DVD/RW, ethernet connection for FTP data transfer.

HP LaserJet 4050N and LaserJet 5P (postcript) printers.

EXAFS data processing programs: Athena, Artemis, and Six Pack.

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