ISSN:
1572-9559
Schlagwort(e):
Receivers
;
Radio Astronomy
;
Submillimeter Techniques
;
Schottky Diode Mixers
;
Laser Local Oscillators
;
Quasi-optics
;
Acousto-Optical Spectrometers
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Physik
Notizen:
Abstract The UCB/MPE Submillimeter Heterodyne Spectrometer is a system for ascronomical spectroscopy in the high-frequency atmospheric windows from 500 to 1000 GHz. It contains a molecular laser local oscillator, a cooled Schottky open structure mixer, a quasi-optical coupling system, and an acousto-optical spectrometer. The compact receiver mounts at the Cassegrain focus of large infrared astronomical telescopes. The receiver noise temperature on the telescope is approximately 3500 K (DSB) during observations of the CO J=7→6 line at 806.652 GHz. The spectrometer's frequency resolution and instantaneous bandwidth (〈2 MHz resolution across 1.1 GHz) are well suited for observations of molecular emission lines from a variety of astronomical sources.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01010725
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