Author/Authors :
Doriese، نويسنده , , W.B. and Beall، نويسنده , , J.A. and Beyer، نويسنده , , J. and Deiker، نويسنده , , S. and Ferreira، نويسنده , , Jack L. and Hilton، نويسنده , , G.C and Irwin، نويسنده , , K.D and Martinis، نويسنده , , J.M. and Nam، نويسنده , , S.W. and Reintsema، نويسنده , , C.D. and Ullom، نويسنده , , J.N. and Vale، نويسنده , , L.R. and Xu، نويسنده , , Y.، نويسنده ,
Abstract :
Large-format (>1000 pixel) arrays of transition-edge sensors are being developed for applications ranging from X-ray materials analysis to submillimeter (SCUBA-2, ACT, SAFIRE) and X-ray (Constellation-X) astronomy. Cryogenic multiplexing allows instrumentation of these large detector arrays with a manageable number of wires and readout channels. We describe a SQUID-based, time-division multiplexer for X-ray microcalorimeter arrays, including a three-stage SQUID amplifier chain and room-temperature digital-feedback electronics. The prototype system has passed two milestone tests. First, energy resolution of 6.6 eV obtained from measuring 5.2 keV joule-heat pulses was not degraded by multiplexing 2, 4, or 8 biased detectors. Second, 55Fe spectra obtained with four multiplexed detectors showed essentially the same resolution as those obtained from the same detectors while not multiplexed.
Keywords :
Transition-edge sensor , SQUID , Bolometer , Time-division , multiplexer , Microcalorimeter
