NSLS BEAMLINE DESCRIPTION: U10B - Infrared

GENERAL INFORMATION

RING: VUV
STATUS: Commissioning, brief periods of operation time available.
RESEARCH PROGRAM: Infrared microspectroscopy of materials.
TIME DEDICATED TO NSLS GENERAL USER PROGRAM: ~50% of operations.

PARTICIPATING INSTITUTIONS: BNL-NSLS, Northrop Grumman Advanced Systems and Technology
LOCAL CONTACT / BEAMLINE MANAGER: Larry Carr: (516) 344-2237, carr@bnl.gov
SPOKESPERSON: Larry Carr: (516) 344-2237, carr@bnl.gov

INSTRUMENT

Spectrometer endstation: Spectra Tech Irus Scanning Infrared Microspectrometer
Frequency Range (cm^-1): 400 - 7000
Spectral resolution (cm^-1): 2.0
Spatial resolution: diffraction-limit (i.e. ~ 3 to 10 microns)
Brightness (compared to a black body): 100x to 1000x
Largest illuminated spot size (0.6 N.A., 15X objective): 20 micron H by 40 micron V
Smallest practical targeting aperture size: 2 microns square
Beamline angular acceptance: (milliradians): 40H x 40V (100% vertical collection down to 240 cm^-1)

OPTICAL CONFIGURATION

Beamline 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 14mm or 8mm and transported under rough vacuum through a KBr window and into the Irus endstation.

Experimental Apparatus

Scanning infrared microspectrometer, consisting of a compact FTIR system with fixed Ge/KBr beamsplitter, integrated to an IR microscope. Includes 15X (N.A. = 0.58) and 32X (N.A. = 0.65) Schwarzchild all-reflecting objectives. Working distance up to ~1cm. Two glass objectives (4X and 20X plan) for visual inspection. Automated X-Y scanning stage for spectroscopic mapping. Step resolution of 1 micron. Small area MCT, photoconductive Ge:Cu detectors.

Computer System Hardware and Software:

Intel Pentium based PC running Spectra-Tech / Nicolet Atlus and Omnic software under Windows 95. Includes video image capture of sample specimen. HP LaserJet (B&W) and Deskjet (color) printers for hardcopy output. Software for converting data into simple (ascii) X,Y data format. Both 1.44Mb diskette and 100Mb Zip disk drives. TCP/IP networking with Telnet, Netscape, and FTP (both client and server). Large data sets can be archived to CD-ROM or Jazz (1Gb) media.

U10 IR Microspectrometer Beamline

For information please contact G.L. Carr
DISCLAIMERS : Revised Date : 16-Aug-98