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Facility for spectroradiometric calibrations (FASCAL 2)


FASCAL 2 facility is solely dedicated to spectral irradiance scale realizations and calibrations. The spectral irradiance standards are calibrated using a high-temperature blackbody operating at nearly 3000 K. The temperature of the blackbody is determined using detector-based techniques traceable to the SIRCUS facility. The known spectral irradiances from the HTBB is used for the spectral irradiance responsivity calibration of a double-grating monochromator which is in turn used to calibrate calibration lamps.

Specifications / Capabilities:

Double-grating monochromator with photomultiplier tube, silicon diode and extended-InGaAs diode detectors are used to cover a range of wavelengths from 220 nm to 2500 nm.  Four independent lamp stations are used for the calibrations.


Name: Charles Gibson
Phone: 301-975-2329
Fax: 301-869-5700
Email: charles.gibson@nist.gov
100 Bureau Drive, M/S 8441
Gaithersburg, MD 20899-8441

Name: Howard Yoon
Phone: 301-975-2482
Email: howard.yoon@nist.gov