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Proceedings Paper

CHAMP: the Carbon Heterodyne Array of the MPIfR
Author(s): Rolf Guesten; Geoffrey Allan Ediss; Frederic Gueth; K. H. Gundlach; H. Hauschildt; Christoph Kasemann; Thomas Klein; Jacob W. Kooi; A. Korn; I. Kramer; Henry G. LeDuc; H. Mattes; K. Meyer; E. Perchtold; M. Pilz; R. Sachert; M. Scherschel; P. Schilke; G. Schneider; J. Schraml; Detlef Skaley; Ronald Stark; W. Wetzker; H. Wiedenhover; W. Wiedenhover; S. Wongsowijoto; F. Wyrowski
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Paper Abstract

A 16-element SIS heterodyne array for operation in the 625 micrometer atmospheric window is under development at the MPIfR. The array consists of 2 X 8 elements with closest feasible spacing of the pixels on the sky ((root)2 (DOT) (Theta) mb). The L.O. tuning range covers the astronomically important CI and the CO(4-3) transitions, and an IF bandwidth of 2 GHz (1200 kms-1) will permit mapping of extragalactic systems. For best system sensitivity the design allows for cold optics ( 15K) and single-sideband operation. The frontend will be linked to a flexible autocorrelator, with a maximum bandwidth of 2 GHz (2048 channels) for each of the 16 modules. In the high-resolution mode, 500 MHz of bandwidth can be operated with 8192 channels of 61 kHz spectral resolution. System components are currently undergoing final integration and critical evaluation in our laboratories. First astronomical commissioning is scheduled for later this year. The sensitivity expected with CHAMP, for e.g. carbon studies, will be unparalleled. With the full array in SSB operation the mapping speed will be enhanced by a factor of 50 - 100 compared to current single-pixel detectors.

Paper Details

Date Published: 31 July 1998
PDF: 11 pages
Proc. SPIE 3357, Advanced Technology MMW, Radio, and Terahertz Telescopes, (31 July 1998); doi: 10.1117/12.317349
Show Author Affiliations
Rolf Guesten, Max-Planck-Institut fuer Radioastronomie (Germany)
Geoffrey Allan Ediss, Max-Planck-Institut fuer Radioastronomie (United States)
Frederic Gueth, Max-Planck-Institut fuer Radioastronomie (Germany)
K. H. Gundlach, Institut de Radioastronomie Millimetrique (France)
H. Hauschildt, Max-Planck-Institut fuer Radioastronomie (Germany)
Christoph Kasemann, Max-Planck-Institut fuer Radioastronomie (Germany)
Thomas Klein, Max-Planck-Institut fuer Radioastronomie (Germany)
Jacob W. Kooi, California Institute of Technology (United States)
A. Korn, Max-Planck-Institut fuer Radioastronomie (Germany)
I. Kramer, Max-Planck-Institut fuer Radioastronomie (Germany)
Henry G. LeDuc, Jet Propulsion Lab. (United States)
H. Mattes, Max-Planck-Institut fuer Radioastronomie (Germany)
K. Meyer, Max-Planck-Institut fuer Radioastronomie (Germany)
E. Perchtold, Max-Planck-Institut fuer Radioastronomie (Germany)
M. Pilz, Max-Planck-Institut fuer Radioastronomie (Germany)
R. Sachert, Max-Planck-Institut fuer Radioastronomie (Germany)
M. Scherschel, Max-Planck-Institut fuer Radioastronomie (Germany)
P. Schilke, Max-Planck-Institut fuer Radioastronomie (Germany)
G. Schneider, Max-Planck-Institut fuer Radioastronomie (Germany)
J. Schraml, Max-Planck-Institut fuer Radioastronomie (Germany)
Detlef Skaley, Max-Planck-Institut fuer Radioastronomie (Germany)
Ronald Stark, Max-Planck-Institut fuer Radioastronomie (Germany)
W. Wetzker, Max-Planck-Institut fuer Radioastronomie (Germany)
H. Wiedenhover, Max-Planck-Institut fuer Radioastronomie (Germany)
W. Wiedenhover, Max-Planck-Institut fuer Radioastronomie (Germany)
S. Wongsowijoto, Max-Planck-Institut fuer Radioastronomie (Germany)
F. Wyrowski, Max-Planck-Institut fuer Radioastronomie (Germany)


Published in SPIE Proceedings Vol. 3357:
Advanced Technology MMW, Radio, and Terahertz Telescopes
Thomas G. Phillips, Editor(s)

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