The multiplexing of signals in direct detector arrays using projections method

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 520; no. 1-3; pp. 562 - 565
• Main Authors: Vystavkin, A.N, Pestriakov, A.V
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 11-03-2004
• Subjects: Radio astronomy; Signal multiplexing; Submillimeter direct detector arrays; 95.55.Jz; 95.75.Mn; Radio astronomy; Submillimeter direct detector arrays; 95.55.−n; 95.85.Bh; Signal multiplexing
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/j.nima.2003.11.315

A new method of the signal multiplexing in low-temperature direct detector arrays is proposed. It is comprised of (1) the constructing the array in a form of parallel rows of the detectors connected in parallel in each row, (2) the reciprocal rotation of the observed radiation image and the array in their common plane, (3) the summation of the direct detectors signals in readout SQUID input coils in each row at each angle of the reciprocal rotation and the acquisition of sums forming thus the set named as projections and (4) the computer reconstruction of the initial image from the projections using the method of convolution and back-projections. The proposed method gives a possibility to reduce drastically amounts of wires connected to direct detectors and readout SQUIDs, to reduce sharply amounts of SQUIDs, to simplify the scheme of the connecting of direct detectors with SQUIDs, and to increase significantly a signal-to-noise ratio in the system.