Performance testing of doped-germanium photoconductors for the ISO long wavelength spectrometer

Computer Science – Performance

Scientific paper

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Far Infrared Radiation, Germanium, Infrared Spectrometers, Photoconductors, European Space Programs, Infrared Space Observatory (Iso), Performance Tests, Spacecraft Instruments

Scientific paper

The ISO (Infrared Space Observatory) Long Wavelength Spectrometer (LWS) uses an array of ten doped germanium photoconductors to cover the wavelength range 45 to 200 micrometers. The performance of the detectors was characterized, optimized, and calibrated, both individually and in the flight instrument. The detector test techniques and calibration methods are described and results for the spectral response, dark current, responsivity, and noise equivalent power are presented. The dependence of these parameters on operating conditions was explored and optimum values established for the flight instrument. Calibration of the flight instrument demonstrated that the sensitivity of the LWS is within specifications.

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