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Beamline U2B

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  • Spectrometer endstation: Thermo Nicolet Magna 860 Step-Scan FTIR and Continuum IR microscope
  • Frequency Range (cm-1): 500 - 4000
  • Spectral resolution (cm-1): 4.0
  • Spatial resolution: diffraction-limit (i.e. ~ 3 to 10 microns)
  • Brightness (compared to a black body): 100x to 1000x
  • Smallest practical targeting aperture size: 3 microns square
  • Beamline angular acceptance: (milliradians): 40H x 40V (100% vertical collection down to 240 cm-1)

Optical Configuration

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 14mm and transported under rough vacuum through a KBr window and into the nitrogen-purged, Thermo Scientific endstation.

Experimental Apparatus

Thermo Magna 860 Step-Scan FTIR equipped with CaF2, KBr, and Si beamsplitters and an internal DTGS-KBr detector. Thermo Continuum IR microscope equipped with 32x transmission/reflection IR objective. "View-thru" capability allow simultaneous sample viewing and IR data collection. One glass objective (10X 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 and Software

Data collection: Intel Pentium VI, 3.4 GHz computer running Windows XP; 2.0 GB RAM, 150 GB hard disk, 17" flat panel monitor; Data analysis:  Intel Pentium VI, 3.0 GHz computer running Windows XP; 2.0 GB RAM, 80 GB hard disk, two 17" flat panel monitors. Software includes Thermo Omnic 7.4 with 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 on USB flash drive or external hard drive.

Forms and Manuals