| GENERAL INFORMATION |
| Research Program - Far-infrared microspectroscopy of materials |
| Ring - VUV-IR Port |
| Status - Diagnostic and Instrumentation |
| Time Dedicated to NSLS General User Program - 0% (To apply for beamtime, click here) |
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| PARTICIPATING INSTITUTIONS |
| National Synchrotron Light Source |
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| SPOKESPERSON |
Larry Carr: 631.344.2237, carr@bnl.gov
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| LOCAL CONTACTS |
| Randy Smith: 631.344.8033, rsmith@bnl.gov |
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| INSTRUMENT |
- Spectra Tech Irus FTIR microscope modified
for far-IR
- Frequency Range (cm-1): 50 to >650
- Spectral resolution (cm-1): 4.0, 8.0, 16.0, 32.0
- Spatial resolution: diffraction-limit (i.e. approximately twice the wavelength)
- Brightness (compared to a black body): 100x to 1000x
- Beamline angular acceptance: (milliradians): 40H x 40V
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| 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 clear aperture wedged diamond window (~350 microns thick). Delivered spectral
range extends from approximately 20 cm-1 to beyond 40,000 cm-1. The infrared is then
collimated to a diameter of 14 mm and transported under rough vacuum through either a
CsI or polyethylene window and into the nitrogen-purged, Spectra Tech Irus endstation. |
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| EXPERIMENTAL APPARATUS |
| Spectra Tech Irus IR microscope equipped with both 15X (0.57NA) and 32x (0.65NA) infrared
objectives, 10X (0.71NA) condenser, Si beamsplitter, and choice of MCT, Ge:Cu, or bolometer
detector. Automated X-Y scanning stage for spectroscopic mapping. Includes video image capture
of sample specimen. Minimum step size of 1 micron. |
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| COMPUTER SYSTEM HARDWARE AND SOFTWARE |
| Intel Pentium VI, 2.0 GHz computer running Windows 2000; 1.0 GB RAM, 80 GB hard
disk, 17" flat panel monitor; Software includes Nicolet Omnic E.S.P. and Atlus
mapping. Access to 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
disk using 3.5" floppy drive, 100 MB Zip drive, and CD-ROM burner. |
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