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THUMPER - A 200-Micron Camera for the JCMT

Evans, Rhodri, Ward-Thompson, Derek, Ade, Peter A. R., Gear, Walter Kieran, Griffin, Matthew Joseph, Leeks, Sarah and Walker, Richard 2002. THUMPER - A 200-Micron Camera for the JCMT. Presented at: Far-IR, Sub-mm & MM Detector Technology Workshop, Monterey, CA, 1-3 April 2002.

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We are building a Two HUndred Micron PhotometER (THUMPER) for the 15-m James Clerk Maxwell Telescope in Hawaii. Taking advantage of a narrow atmospheric window that opens up at this wavelength on high, dry sites, THUMPER will make continuum observations at 200-microns from the ground with unprecedented 7-arcsecond angular resolution. The focal plane comprises a hexagonal close-packed array of seven stressed Ge:Ga photoconductors fed by individual Winston cones and operating at 3.7K. The detectors are read out by TIA amplifiers using cold JFET pairs. THUMPER is being designed to work in parallel with SCUBA using a dichroic beam-splitter. The data will be handled by the SCUBA data acquisition system, enabling all SCUBA users to see the THUMPER instrument as an additional shortwavelength sub-mm array. The instrument is planned to be in operation by early 2003. The predicted NEFD under good conditions (0.5mm of pwv) is around 20 Jy/Hz1/2.

Item Type: Conference or Workshop Item (Paper)
Date Type: Completion
Status: Unpublished
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Last Modified: 09 Apr 2020 14:40

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