Quantum efficiency measurement of the Transiting Exoplanet Survey Satellite (TESS) CCD detectors

A. Krishnamurthy; J. Villasenor; C. Thayer; S. Kissel; G. Ricker; S. Seager; R. Lyle; A. Deline; E. Morgan; T. Sauerwein; R. Vanderspek

doi:10.1117/12.2232244

5 August 2016 Quantum efficiency measurement of the Transiting Exoplanet Survey Satellite (TESS) CCD detectors

A. Krishnamurthy, J. Villasenor, C. Thayer, S. Kissel, G. Ricker, S. Seager, R. Lyle, A. Deline, E. Morgan, T. Sauerwein, R. Vanderspek

Author Affiliations +

Proceedings Volume 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave; 99042W (2016) https://doi.org/10.1117/12.2232244
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

Very precise on-ground characterization and calibration of TESS CCD detectors will significantly assist in the analysis of the science data from the mission. An accurate optical test bench with very high photometric stability has been developed to perform precise measurements of the absolute quantum efficiency. The setup consists of a vacuum dewar with a single MIT Lincoln Lab CCID-80 device mounted on a cold plate with the calibrated reference photodiode mounted next to the CCD. A very stable laser-driven light source is integrated with a closed-loop intensity stabilization unit to control variations of the light source down to a few parts-per-million when averaged over 60 s. Light from the stabilization unit enters a 20 inch integrating sphere. The output light from the sphere produces near-uniform illumination on the cold CCD and on the calibrated reference photodiode inside the dewar. The ratio of the CCD and photodiode signals provides the absolute quantum efficiency measurement. The design, key features, error analysis, and results from the test campaign are presented.

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A. Krishnamurthy, J. Villasenor, C. Thayer, S. Kissel, G. Ricker, S. Seager, R. Lyle, A. Deline, E. Morgan, T. Sauerwein, and R. Vanderspek "Quantum efficiency measurement of the Transiting Exoplanet Survey Satellite (TESS) CCD detectors", Proc. SPIE 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave, 99042W (5 August 2016); https://doi.org/10.1117/12.2232244

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