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