The U.C. Berkeley Space Sciences Laboratory and Department of Physics Submillimeter Receiver
| Autor: | D. T. Jaffe, Andrew I. Harris, Reinhard Genzel |
|---|---|
| Rok vydání: | 1986 |
| Předmět: |
Physics
Noise temperature Spectrometer Physics::Instrumentation and Detectors business.industry Local oscillator Superheterodyne receiver Astrophysics::Instrumentation and Methods for Astrophysics Physics::Optics Cassegrain reflector Schottky diode Astrophysics::Cosmology and Extragalactic Astrophysics Laser law.invention Optical pumping Optics law Optoelectronics business Astrophysics::Galaxy Astrophysics |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| Popis: | The UCB submm heterodyne receiver is a complete system for high-resolution astronomical spectroscopy in the 350-micron and 450-micron atmospheric windows. This compact system mounts directly at the Cassegrain focus of large optical and IR telescopes. It consists of a laser local oscillator, open structure mixer, quasi-optical coupling system, a broad-band IF system, and an acoustooptical spectrometer. The local oscillator is a 1-m-long submm laser optically pumped by a CO2 laser. The mixer is a quasi-optical corner-cube antenna structure and Schottky diode. The mixer is currently operated at room temperature, and its performance at 77 K is being evaluated. The system noise temperature is less than 7000 K SSB during observations. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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