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28 July 2000 Wideband spectrometer for HIFI-FIRST
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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.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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);

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