Author/Authors :
Audley، نويسنده , , M.D and Holland، نويسنده , , W.S and Duncan، نويسنده , , W.D and Atkinson، نويسنده , , D and Cliffe، نويسنده , , M and Ellis، نويسنده , , M and Gao، نويسنده , , X and Gostick، نويسنده , , D.C and Hodson، نويسنده , , T and Kelly، نويسنده , , D and MacIntosh، نويسنده , , M.J and McGregor، نويسنده , , H and Peacocke، نويسنده , , T and Robson، نويسنده , , I and Smith، نويسنده , , I and Irwin، نويسنده , , K.D and Hilton، نويسنده , , G.C and Ullom، نويسنده , , J.N and Walton، نويسنده , , A and Dunare، نويسنده , , C and Parkes، نويسنده , , W and Ade، نويسنده , , P.A.R and Bintley، نويسنده , , D and Gannaway، نويسنده , , F and Griffin، نويسنده , , M and Pisano، نويسنده , , G and Sudiwala، نويسنده , , R.V and Walker، نويسنده , , I and Woodcraft، نويسنده , , A and Fich، نويسنده , , M and Halpern، نويسنده , , M and Mitchell، نويسنده , , G and Naylor، نويسنده , , D and Bastien، نويسنده , , P، نويسنده ,
Abstract :
SCUBA-2, which replaces the Submillimetre Common User Bolometer Array (SCUBA) (Mon. Not. R. Astron. Soc. 303 (1999) 659) on the James Clerk Maxwell telescope in 2006, will be the first CCD-like array for submillimeter astronomy. Unlike previous detectors which have used discrete bolometers, SCUBA-2 has two DC-coupled, monolithic, filled arrays with a total of ∼10,000 bolometers. It will offer simultaneous imaging of an 8×8 arcmin field of view at wavelengths of 850 and 450 μm. SCUBA-2 is expected to have a huge impact on the study of galaxy formation and evolution in the early Universe as well as star and planet formation in our own Galaxy. Mapping the sky to the same S/N up to 1000 times faster than SCUBA, it will also act as a pathfinder for the new submillimetre interferometers such as ALMA. SCUBA-2ʹs absorber-coupled pixels use superconducting transition edge sensors (Ph.D. Thesis, Stanford, 1995) operating at ∼120 mK for photon noise limited performance. The monolithic silicon detector arrays are deep-etched by the Bosch process to isolate the pixels on silicon nitride membranes (Nucl. Instr. and Meth. A, these proceedings). Electrical connections are made through indium bump bonds to a backplane that incorporates a SQUID time-domain multiplexer. We describe the key technologies that make SCUBA-2 possible and give an update on the considerable progress in the detector development and instrument design that has taken place over the last 2 years.
