Wideband spectrometer for HIFI-FIRST

Details Wideband spectrometer for HIFI-FIRST Wideband spectrometer for HIFI-FIRST

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000spie.4013..313s&link_type=abstract

Proc. SPIE Vol. 4013, p. 313-324, UV, Optical, and IR Space Telescopes and Instruments, James B. Breckinridge; Peter Jakobsen; E

Physics

Optics

4

Scientific paper

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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