期刊
ASTRONOMY & ASTROPHYSICS
卷 518, 期 -, 页码 -出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201014698
关键词
instrumentation: spectrographs; methods: observational; infrared: general; submillimeter: general; techniques: spectroscopic
资金
- National space agencies and science foundations
- NWO [50OF000-1/2/5]
- Central resources of the Max-Planck-Society
- JPL, California Institute of Technology under National Aeronautics and Space Administration
- NASA
- Centre National de la Recherche Scientifique/Institut National des Sciences de l'Univers (CNRS/ INSU
- Centre National d'Etudes Spatiales (CNES)
- Agenzia Spaziale Italiana-ASI [I/005/07/0]
- Istituto Nazionale di Astrofisica INAF
- Canadian Space Agency
- Science and High Education Ministry of Poland [N203 393334]
- Ministerio de Ciencia e Innovacin (Consejo de Investigaciones Cientificas)
- Ministerio de Fomento (Instituto Geografico Nacional)
- Swedish National Space Board [Dnr 136/04, Dnr 114/07, Dnr 286/05, Dnr 116/03]
- Knut and Alice Wallenberg Foundation
- Prodex grants
- HIFI
Aims. This paper describes the Heterodyne Instrument for the Far-Infrared ( HIFI) that was launched onboard ESA's Herschel Space Observatory in May 2009. Methods. The instrument is a set of 7 heterodyne receivers that are electronically tuneable, covering 480-1250 GHz with SIS mixers and the 1410-1910 GHz range with hot electron bolometer (HEB) mixers. The local oscillator (LO) subsystem comprises a Ka-band synthesizer followed by 14 chains of frequency multipliers and 2 chains for each frequency band. A pair of auto-correlators and a pair of acousto-optical spectrometers process the two IF signals from the dual-polarization, single-pixel front-ends to provide instantaneous frequency coverage of 2 x 4 GHz, with a set of resolutions (125 kHz to 1 MHz) that are better than 0.1 kms(-1). Result. After a successful qualification and a pre-launch TB/TV test program, the flight instrument is now in-orbit and completed successfully the commissioning and performance verification phase. The in-orbit performance of the receivers matches the pre-launch sensitivities. We also report on the in-orbit performance of the receivers and some first results of HIFI's operations.
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