AAS 198th Meeting, June 2001
Session 5. Ground Based Instruments and Surveys
Display, Monday, June 4, 2001, 9:20am-6:30pm, Exhibit Hall

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[5.09] SHARC II, a Second Generation 350 Micron Camera for the Caltech Submillimeter Observatory

C. D. Dowell, W. Collins, M. Gardner, A. Kovacs, D. C. Lis, T. G. Phillips, H. Yoshida (California Institute of Technology), C. Allen, M. Jhabvala, S. H. Moseley, Jr., G. Voellmer (NASA-Goddard Space Flight Center)

Development of a new facility 350 micron camera (`SHARC II') for the 10 m Caltech Submillimeter Observatory is underway. The camera will feature a 12x32 array of doped silicon Pop-Up Bolometers -- scheduled for delivery from NASA-Goddard to Caltech toward the end of 2001 -- cooled with 3He to 0.3 K. Detector absorption resonances, filters, and anti-reflection coatings are optimized for 350 microns. The pixels will sub-sample the diffraction pattern of the CSO with a spacing of 5 arcsec (0.7 lambda/D). We are implementing `total power' amplifiers to allow scanned observations with good image reconstruction fidelity and sensitivity. The expected point-source sensitivity of SHARC II in excellent weather is 0.5 Jy s-1/2, an improvement of a factor of 2 over the existing SHARC (Wang et al. 1996; Benford et al. 1999). We report on an engineering run with the camera at the CSO in September 2000 using a partial (16-pixel) detector array.

The author(s) of this abstract have provided an email address for comments about the abstract: cdd@submm.caltech.edu

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