TheHerschel-Heterodyne Instrument for the Far-Infrared (HIFI)
نویسندگان
چکیده
منابع مشابه
THz Instrumentation for the Herschel Space Observatory's Heterodyne Instrument for Far Infrared
The Heterodyne Instrument for Far Infrared (HIFI) on ESA's Herschel Space Observatory utilizes a variety of novel RF components in its five SIS receiver channels covering 4801250 GHz and two HEB receiver channels covering 14101910 GHz. The local oscillator unit will be passively cooled while the focal plane unit is cooled by superfluid helium and cold helium vapors. HIFI employs W-band GaAs amp...
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Highly compensated Ge:Ga photoconductors have been fabricated and evaluated for high bandwidth heterodyne detection. Bandwidths up to 60 MHz have been obtained with corresponding current responsivity of 0.01 A/W.
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Heterodyne experiments have been performed m the middle infrared region of the eleetromngwtic spectrum .sinp the C02 laser as a radiation source. Theoretically optimum operation bas been achieved at lrHz heterodyne frqnencies p h o t d w t i v e G e : Cn detectors operated at 4% and at kHz and MHz frequencies using Pb, photovoltaic detectors at 77.K. In aceordance with the tiwry, the minimm det...
متن کاملThe effect of sideband ratio on line intensity for Herschel/HIFI
The Heterodyne Instrument for the Far Infrared (HIFI) on board the Herschel Space Observatory is composed of a set of fourteen double sideband mixers. We discuss the general problem of the sideband ratio (SBR) determination and the impact of an imbalanced sideband ratio on the line calibration in double sideband heterodyne receivers. The HIFI SBR is determined from a combination of data taken d...
متن کاملStatistical Nature of the Infrared Heterodyne Signal ' ' )
1 HETERODYNE detection is a process which has been used in the radiowave, microwave, 1 and optical regions of the electromagnetic spectrum. Recently, the technique has been extended to the middle infrared as well [I-31. This paper discusses theoretical and experimental considerations related to the signal-to-noise ratio and the statistical nature of the coherently detected signal at the 10.6 pm...
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ژورنال
عنوان ژورنال: Astronomy and Astrophysics
سال: 2010
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201014698