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Universität zu Köln
Mathematisch-Naturwissenschaftliche Fakultät
Fachgruppe Physik

I. Physikalisches Institut

HIFI: Heterodyne Instrument for the Far Infrared

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Herschel Space Observatory (HSO)

The Herschel Space Observatory (formerly called FIRST, Far InfraRed and Submillimeter Telescope) is the fourth of the original Cornerstone missions in the ESA Horizon 2000 science plan. It will perform imaging photometry and spectroscopy in the 60-670 µm range. The Herschel satellite will have three instruments on board:

  • HIFI (Heterodyne Instrument for the Far Infrared)
  • SPIRE (Spectral and Photometric Imaging REceiver)
  • PACS (Photodetector Array Camera & Spectrometer)


Overview of the HIFI instrument

HIFI will consist of three major sub-systems and an instrument controller.


Our Contribution to HIFI

WBS_FM1_FM2 The Wide Band Spectrometer is one back-end of HIFI consisting of an Acoustic-Optical Spectrometer, its electronic and the associated IF-processor. The electronics, the IF-processors, and the acousto-optical units are developed by Max-Planck-Institut für Sonnensystemforschung, Miteq and I.InstPhys/KOSMA, respectively. MU2_demo The Mixer unit for Band 2 provides a mixer with a SIS junction covering the RF-frequency range of 640-800 GHz. The IF-frequency range is 4-8 GHz.