dorsal/arxiv
View SchemaLock-in detection using a cryogenic low noise looped current preamplifier for the readout of resistive bolometers
| Authors | D. Yvon, V. Sushkov, R. Bernard, J. L. Bret, B. Cahan, O. Cloue, O. Maillard, B. Mazeau, J. P. Passerieux, B. Paul, C. Veyssiere |
|---|---|
| Categories | |
| ArXiv ID | physics/9902042 |
| URL | https://arxiv.org/abs/physics/9902042 |
| DOI | 10.1016/S0168-9002(01)01332-8 |
| Journal | Nucl.Instrum.Meth. A481 (2002) 306-316 |
Abstract
We implemented a low noise current preamplifier for the readout of resistive bolometers. We tested the apparatus on thermometer resistances ranging from 10 Ohm to 500 Mohm. The use of current preamplifier overcomes constraints introduced by the readout time constant due to the thermometer resistance and the input capacitance. Using cold JFETs, this preamplifier board is shown to have very low noise: the Johnson noise of the source resistor (1 fA/Hz1/2) dominated in our noise measurements. We also implemented a lock-in chain using this preamplifier. Because of fast risetime, compensation of the phase shift may be unnecessary. If implemented, no tuning is necessary when the sensor impedance changes. Transients are very short, and thus low-passing or sampling of the signal is simplified. In case of spurious noise, the modulation frequency can be chosen in a much wider frequency range, without requiring a new calibration of the apparatus.
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"abstract": "We implemented a low noise current preamplifier for the readout of resistive\nbolometers. We tested the apparatus on thermometer resistances ranging from 10\nOhm to 500 Mohm. The use of current preamplifier overcomes constraints\nintroduced by the readout time constant due to the thermometer resistance and\nthe input capacitance. Using cold JFETs, this preamplifier board is shown to\nhave very low noise: the Johnson noise of the source resistor (1 fA/Hz1/2)\ndominated in our noise measurements. We also implemented a lock-in chain using\nthis preamplifier. Because of fast risetime, compensation of the phase shift\nmay be unnecessary. If implemented, no tuning is necessary when the sensor\nimpedance changes. Transients are very short, and thus low-passing or sampling\nof the signal is simplified. In case of spurious noise, the modulation\nfrequency can be chosen in a much wider frequency range, without requiring a\nnew calibration of the apparatus.",
"arxiv_id": "physics/9902042",
"authors": [
"D. Yvon",
"V. Sushkov",
"R. Bernard",
"J. L. Bret",
"B. Cahan",
"O. Cloue",
"O. Maillard",
"B. Mazeau",
"J. P. Passerieux",
"B. Paul",
"C. Veyssiere"
],
"categories": [
"physics.ins-det",
"physics.space-ph"
],
"doi": "10.1016/S0168-9002(01)01332-8",
"journal_ref": "Nucl.Instrum.Meth. A481 (2002) 306-316",
"title": "Lock-in detection using a cryogenic low noise looped current preamplifier for the readout of resistive bolometers",
"url": "https://arxiv.org/abs/physics/9902042"
},
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