Wideband spectrometer for HIFI-FIRST

Rudolf T. Schieder; Oliver Siebertz; Frank Schloeder; Csaba Gal; Juergen Stutzki; Paul Hartogh; Vincenzo Natale

doi:10.1117/12.393988

28 July 2000 Wideband spectrometer for HIFI-FIRST

Rudolf T. Schieder, Oliver Siebertz, Frank Schloeder, Csaba Gal, Juergen Stutzki, Paul Hartogh, Vincenzo Natale

Proceedings Volume 4013, UV, Optical, and IR Space Telescopes and Instruments; (2000) https://doi.org/10.1117/12.393988
Event: Astronomical Telescopes and Instrumentation, 2000, Munich, Germany

Abstract

The wideband acousto-optical spectrometer (WBS) for HIFI- FIRST is comprised of two array-AOS with 4 times 1 GHz bands each. There are some advantages to this design, the most important one is that relative frequency and amplitude variations between the 4 bands are rather unlikely. This is demonstrated by laboratory tests, which verify also that fairly slow beam-switching at 0.5 Hz may be a sufficient chop speed for HIFI. The performance of array-AOS has also been demonstrated during measurements at ground-based observatories. WBS consists of three independent units, one IF-, one optics-, and one electronics-unit. Some of the details of the WBS design are described, and the present performance estimates are given.

Citation Download Citation

Rudolf T. Schieder, Oliver Siebertz, Frank Schloeder, Csaba Gal, Juergen Stutzki, Paul Hartogh, and Vincenzo Natale "Wideband spectrometer for HIFI-FIRST", Proc. SPIE 4013, UV, Optical, and IR Space Telescopes and Instruments, (28 July 2000); https://doi.org/10.1117/12.393988

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