ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
We report on the design and testing of a new readout scheme for superconducting tunnel junction (STJ) arrays. By grouping the electrodes in rows and columns, this method drastically reduces the number of connections and electronic circuits required for reading out a large format array of pixelated detectors. Using charge sensitive amplifiers with junction field-effect transistors we verify that the energy resolution degrades primarily due to capacitance increase at the amplifier's input node. However, since each detector is readout by two independent circuits, these two outputs can be combined to increase the signal-to-noise level. For a N×N array, we show that the equivalent noise charge at the input worsens by a factor much less than N as compared to single device readout. We also report on a proof-of-principle experiment carried out on a two-by-two array of STJs using optical photon excitation. These measurements show that stable biasing of STJs is possible in this configuration and that the line resolutions are consistent with our theoretical predictions. © 2000 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1287636
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