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Missile defense transfer radiometer (MDXR)


The Missile Defense transfer Radiometer (MDXR) is a cryogenic transfer radiometer for providing calibrations of collimated infrared beams in users’ cryo-vacuum test facilities against the NIST primary optical power standards. The MDXR has both a filter radiometer and a cryogenic Fourier transform spectrometer (Cryo-FTS), both of which operate in vacuum at a temperature below 20 kelvin, and interfaces to customer chambers through an end flange. The Cryo-FTS provides continuous spectral coverage from 4 μm to 20 μm. An onboard absolute cryogenic radiometer (ACR) provides spectrally integrated power measurements down to a noise floor of approximately 3.5 pW. An onboard 7 cm collimator and cryogenic blackbody serve as a stability monitor and a spectral calibration source for the Cryo-FTS. The MDXR has been used multiple times at a variety of facilities since it was first operational in May 2010.

Specifications / Capabilities:

  • Measure absolute power with onboard ACR.
  • Monitor and calibrate its own spectral throughput with onboard blackbody calibration source and 7 cm collimator.
  • Fourier-transform spectrometer with spectral resolution of 0.85 cm-1 from 4 μm to 20 μm.
  • Measure collimated beam with spectral irradiance input levels between 10-15 W/cm2/μm and 10-9 W/cm2/μm.
  • Spectrally resolve beam over IR wavelengths from 2 µm to 30 µm with variable bandpass filters.
  • Evaluate linear polarization of collimated beams.
  • Easily transported with support equipment.
  • Self-contained vacuum and cryogenic systems for operation external to test chamber being evaluated.

Name: Simon Kaplan
Phone: 301-975-2336
Fax: 301-840-8551
Email: simon.kaplan@nist.gov
100 Bureau Drive, M/S 8441
Gaithersburg, MD 20899-8441

Name: Solomon Woods
Phone: 301-975-2382
Email: solomon.woods@nist.gov

Name: Timonthy Jung
Phone: 301-975-2330
Email: timothy.jung@nist.gov

Name: Adriaan Carter
Phone: 301-975-4765
Email: adriaan.carter@nist.gov