GENERAL INFORMATION

bullet RESEARCH PROGRAM: earth and planetary materials, high-pressure research, and microspectroscopy 
bulletRING: VUV -- Infrared Port
bulletSTATUS: Operational
bulletTIME DEDICATED TO NSLS GENERAL USER PROGRAM: 25%
 

 


PARTICIPATING INSTITUTIONS

bulletNational Synchrotron Light Source
bulletCarnegie Institution of Washington, Geophysical Laboratory

LOCAL CONTACT: 

Zhenxian Liu (CIW) (631) 344-5502; zxliu@bnl.gov

SPOKESPERSON:

Russell J. Hemley (CIW) (202) 478-8951; hemley@gl.ciw.edu


OPTICAL CONFIGURATION

U2 is an infrared port delivering at least 80 milliradians horizontally by 40 milliradians vertically. The beam is extracted through a wedged diamond window, then divided into two equal beam lines, U2A and U2B. Each line has a Michelson interferometer, U2A a Bruker 66v/S vacuum bench with a nitrogen-purged Bruker microscope and custom optics; U2B a Nicolet Magna operated in vacuum with a custom measuring chamber.

Total Angular Acceptance: 45H x 45V mrad.

Mirror: Water-cooled silicon carbide beam extraction; beam is steered and focused by a combination of ellipsoidal and planar mirrors to provide a 1:1 image of the source. Beam passes through a wedged diamond window and continues through rough vacuum and then through another diamond window and into the evacuated or nitrogen-purged instrumentation for U2A.

 

EXPERIMENTAL APPARATUS

 
bulletBruker 66v/S vacuum FTIR
Frequency Range: 10-10000 cm-1 
Resolution: 1 cm-1 
Detectors: MCT-A (mid-IR), SiB / Si bolometer (far-IR) / DTGS-FIR (D201) 
Software: OPUS NT v4.0 
 
Bruker IRscope II
Frequency Range: 600-10000 cm-1 
Resolution: 1 cm-1 
Detectors: MCT-A, SiB / Si bolometer (far-IR), DTGS-FIR (D201), Silicon Diode (visible)   
Software: OPUS NT v4.0
bullet Custom IR microscopes 

Long working distance (40 mm) that can be used for near- to mid-IR absorption and reflectivity measurements with diamond cells inside cryostats and furnaces (to above 200 GPa).

Near- to Far-IR vacuum microscope for routine high-pressure (diamond-cell) spectroscopy and microspectroscopy.

 

bulletVisible Spectrograph
 

Frequency Range: 0 - 1300 nm mechanical range (300 and 1500g/mm gratings)
Measurable spectral range: 400 nm - 1.06 micron
Resolution: 0.03 nm 

 
bulletLasers

Coherent Innova 90 plus Argon ion laser
Total power: 6 watts at multi-line visible
Single line from 514.5 nm to 454.5 nm 

Coherent Titanium-Sapphire Tunable Laser
Tuning Range:  SW/MW optic set: 700 - 930 nm
Pump Power:  Innova 90 Plus at 6 watts multi-line visible
Output Peak Power:  725 mW

 

COMPUTER SYSTEM HARDWARE AND SOFTWARE

Data acquisition:  Pentium III, 350 MHz computer running Windows 2000 professional; 3.5" floppy drive; CD-RW drive; 100 MB Zip drive; Laser Jet 2100TN printer

NSLS Home Page............BNL Home Page...............IR Home Page

This page was last updated by Zhenxian Liu on May 10, 2003.