FANATIC: an SIS radiometer for radio astronomy from 660 to 695 GHz

Astronomy and Astrophysics – Astronomy

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

6

Far Infrared Radiation, Infrared Astronomy, Infrared Radiometers, Microwave Radiometers, Radio Astronomy, Sis (Superconductors), Antenna Arrays, Atomic Spectra, Diplexers, Galaxies, Gunn Diodes, Line Spectra, Microwave Oscillators, Radio Receivers

Scientific paper

FANATIC is a compact radiometer optimized for radio astronomy from about 660 to 695 GHz (lambda 455 - 432 micron). We observed a large number of molecular and atomic spectral lines from galactic and extragalactic sources during FANATIC's first run on the James Clerk Maxwell Telescope in early March 1994. Double sideband receiver temperatures during observations were about 800 K (25 h nu/k). The heart of the receiver is a two-junction Nb/AlO(x)/Nb SIS array fed by a sandwiched V-antenna. The junction array and antenna are fabricated together at IRAM's Grenoble SIS laboratory. Each junction has a normal resistance of Rn approximately 10 Ohm, an area of approximately 2 sq micron, an individual radial stub circuit to resonate the capacitance, and a lambda/4 transformer to match to the antenna. The solid-state local oscillator is a mm-wave Gunn oscillator followed by a doubler and tripler. The LO diplexer is a Martin-Puplett interferometer, which insures that there is always abundant LO power for operation and speedy tuning. The receiver and telescope coupling optics, LO, dewar, and calibration system fit on an 0.6 x 0.8 m optical breadboard.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

FANATIC: an SIS radiometer for radio astronomy from 660 to 695 GHz does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with FANATIC: an SIS radiometer for radio astronomy from 660 to 695 GHz, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and FANATIC: an SIS radiometer for radio astronomy from 660 to 695 GHz will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1790870

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.