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Beamline U2B

General Information

Source Type
Bending Magnet

Status
Operational

General User Beamtime
50%

Energy Range Category
Infrared

Energy Range
500-4000 cm-1

Beamline Type
Facility Beamline

Technique(s)
Infrared microspectroscopy

Research Types
IR microspectroscopy and imaging of vibrational/chemical spectroscopic features.

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.
Lisa Miller, Brookhaven National Laboratory, lmiller@bnl.gov, 344-2091

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.
Randy Smith, Brookhaven National Laboratory, rsmith@bnl.gov, 344-8033

Beamtime Scheduler The beamline staff member responsible for coordination of beamline schedule every trimester. Contact for questions about beamtime scheduling.
Lisa Miller, Brookhaven National Laboratory, lmiller@bnl.gov, 344-2091

Beamline Phone
631-344-3778

Instrumentation

Beamline Characteristics

Spectral Range Instrument Spectral Resolution Greater than Globar Spot Size (mm) Total Angular Acceptance (mrad)
500 – 4000 cm-1 Thermo Nicolet Magna 860 & Continuum IR Microscope 4 cm-1 100X-1000X 45H x 45V

Source Type
Bending magnet

Optical System
A two-mirror system (M1 and M2) collects and re-images the synchrotron infrared source at a point just outside of the storage ring's UHV. M1 is a water-cooled plane mirror made from silicon with a gold reflective coating. M2 is a glass ellipsoid with an aluminum reflective coating. The ellipsoidal mirror focuses the beam through an 11mm aperture wedged diamond window (~350 microns thick). Delivered spectral range extends from approximately 10 cm-1 to beyond 40,000 cm-1. The infrared is then collimated to a diameter of 14 mm or 8 mm and transported under rough vacuum through a KBr (or polyethylene) window and into the nitrogen-purged, Nicolet endstation.

Experimental Apparatus
Nicolet Magna 860 Step-Scan FTIR equipped with CaF2, KBr, and Si beamsplitters and an internal DTGS-KBr detector.

Spectra Tech Continuum IR microscope equipped with 32x transmission/reflection, ATR, and grazing angle IR objectives. "View-thru" capability allow simultaneous sample viewing and IR data collection. Two glass objectives (4X and 20X plan) for visual inspection. DIC and fluorescence microscopy capabilities. IR and visible polarizers.

Automated X-Y scanning stage for spectroscopic mapping. Includes video image capture of sample specimen. Step resolution of 1 micron.

Small area MCT-A, MCT-B detectors

Computer System Hardware & Software
Intel Pentium VI, 2.0 GHz computer running Windows XP; 1.0 GB RAM, 80 GB hard disk, 17" flat panel monitor; Software includes Nicolet Omnic E.S.P. and Atlus mapping. HP LaserJet 1100 (B&W) printer for hardcopy output. Software for converting data into simple (ascii) X,Y data format. Data can be stored via USB jump drive.

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