Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000exa....10..157s&link_type=abstract
Experimental Astronomy, v. 10, Issue 2/3, p. 157-176 (2000).
Astronomy and Astrophysics
Astronomy
2
Scientific paper
The performance of the ten doped germanium photoconducting detectors on the Infrared Space Observatory Long Wavelength Spectrometer is discussed. This instrument was designed to make spectroscopic measurements of astronomical sources in the wavelength range from 43 to 198 μm. It employed^* a combination of stressed and unstressed Ge:Ga detectors and one Ge:Be detector coupled to Infrared Labs JF-4 integrating amplifiers. The performance of the detectors was affected by the ionising radiation in the space environment. The Noise Equivalent Power of the detectors increased by a factor of ~4 compared to that measured during ground testing. We show that this was the result of reducing the operating bias, and therefore the responsivity, of the detectors and using shorter integration ramps to alleviate the effects of the ionising radiation impacts. ^ast ISO exhausted its helium supply on 8 April 1998.
Burgdorf Martin
Clegg Peter
Griffin Matt
Leeks Sarah
Lim Tanya
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