The use of HEMTs in multiplexing large arrays of high impedance LTDs

The use of a multiplexing system in close proximity to the detectors simplifies the electronics associated with large arrays of Low Temperature Detectors (LTDs). Here, we report the demonstration of an array of Quantum-Point-Contact High-Electron-Mobility-Transistors (QPC-HEMTs) down to 100 mK used...

Full description

Saved in:
Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2006-04, Vol.559 (2), p.829-831
Main Authors: Yates, S.J.C., Benoit, A., Jin, Y., Camus, Ph, Cavanna, A., Durand, T., Etienne, B., Gennser, U., Grémion, E., Hoffmann, C., Leclercq, S., Ulysse, Ch
Format: Article
Language:English
Subjects:
Arrays of detectors
Low temperature electronics
LTD
Readout electronics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The use of a multiplexing system in close proximity to the detectors simplifies the electronics associated with large arrays of Low Temperature Detectors (LTDs). Here, we report the demonstration of an array of Quantum-Point-Contact High-Electron-Mobility-Transistors (QPC-HEMTs) down to 100 mK used to time multiplex the signal from 8 simulated high impedance LTDs ( ∼ 10 M Ω ) to an individual amplifier. Capacitors in parallel with the individual LTDs integrate the signal between measurements so giving a quasi-DC measurement of the LTDs. With the high impedance of the LTD this acts as a filter which counter acts the aliasing of the Johnson noise of the LTD associated with the time-multiplexing technique.
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2005.12.151