Zobrazeno 1 - 6
of 6
pro vyhledávání: '"P. S. Leiker"'
Autor:
Paul K. Grimes, Nimesh A. Patel, C. Y. Edward Tong, P. S. Leiker, Robert W. Wilson, Brian Force, Ram Rao, Robert D. Christensen
Publikováno v:
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy X.
We describe the distributed control system that we are developing for the Wideband frontend receiver system for Submillimeter Array (wSMA). This distributed control system is based on an array of Raspberry-Pi (RPi) modules, which is embedded in each
Autor:
Paul K. Grimes, Chih-Chiang Han, Wei-Chun Lu, Lingzhen Zeng, C. Y. Edward Tong, Tse-Jun Chen, P. S. Leiker, Ming-Jye Wang
Publikováno v:
SPIE Proceedings.
We report on the design of a 240 GHz double-side-band receiver for the Submillimeter Array (SMA). The heart of this receiver is a 3-junction series connected SIS mixer, which allows it to provide intermediate frequency (IF) output up to more than 12
Autor:
Robert W. Wilson, Ray Blundell, Robert Kimberk, Nimesh A. Patel, R. J. Plante, P. Riddle, Todd R. Hunter, A. R. Diven, R. D. Christensen, Ken Young, J. Maute, P. S. Leiker
We describe the design and performance of the digital servo and motion control system for the 6-meter diameter parabolic antennas of the Submillimeter Array (SMA) on Mauna Kea, Hawaii. The system is divided into three nested layers operating at a dif
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::837fddb8131936f5e25838fc6478089d
Autor:
Raymond Blundell, Ken H. Young, Paul Yamaguchi, Robert Kimberk, Todd R. Hunter, P. S. Leiker, John Test, Glen Petitpas, Robert W. Wilson, George Nystrom
We have constructed a five station 12 GHz atmospheric phase interferometer (API) for the Submillimeter Array (SMA) located near the summit of Mauna Kea, Hawaii. Operating at the base of unoccupied SMA antenna pads, each station employs a commercial l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d8719f2177c334b024bdee9bb72e951f
http://arxiv.org/abs/1206.0039
http://arxiv.org/abs/1206.0039
Autor:
Robert Kimberk, P. S. Leiker, Cheuk-yu Edward Tong, Todd R. Hunter, Raymond Blundell, James Battat
Publikováno v:
NASA Astrophysics Data System
We have designed a system to stabilize the gain of a submillimeter heterodyne receiver against thermal fluctuations of the mixing element. In the most sensitive heterodyne receivers, the mixer is usually cooled to 4 K using a closed-cycle cryocooler,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3606b75df2086367f1d005731eb5d640
Publikováno v:
SPIE Proceedings.
Efficient operation of a submillimeter interferometer requires remote (preferably automated) control of mechanically tuned local oscillators, phase-lock loops, mixers, optics, calibration vanes and cryostats. The present control system for these aspe