Author/Authors :
Irwin، نويسنده , , Kent D and Audley، نويسنده , , Michael D and Beall، نويسنده , , James A and Beyer، نويسنده , , Jِrn and Deiker، نويسنده , , Steve and Doriese، نويسنده , , William E. Duncan، نويسنده , , William and Hilton، نويسنده , , Gene C and Holland، نويسنده , , Wayne and Reintsema، نويسنده , , Carl D and Ullom، نويسنده , , Joel N and Vale، نويسنده , , Leila R and Xu، نويسنده , , Yizi Yin، نويسنده ,
Abstract :
Superconducting quantum interference device (SQUID) multiplexers make it possible to build arrays of thousands of microcalorimeters and bolometers based on superconducting transition-edge sensors (TES) with a manageable number of readout channels. Previous to this work, TES arrays were multiplexed by extracting leads from each pixel to multiplexer filter and switching elements outside of the focal plane. As the number of pixels is increased in a close-packed array, it becomes difficult to route the leads to the multiplexer. We report on the development of an in-focal-plane SQUID multiplexer to solve this problem. In this circuit, the filter and switching elements associated with each pixel fit within the pixel area so that signals are multiplexed before being extracted from the focal plane. This in-focal-plane architecture will first be used in the SCUBA-2 instrument at the James Clerk Maxwell Telescope in 2006.
Keywords :
Microcalorimeter , Transition-edge sensor , multiplexer , Bolometer , SQUID
