LOW-NOISE VOLTAGE AND CHARGE PREAMPLIFIERS FOR PHONON AND IONIZATION DETECTORS AT VERY-LOW TEMPERATURE

Authors
YVON D CUMMINGS A STOCKWELL W BARNES P STANTON C SADOULET B SHUTT T STUBBS C
Citation
D. Yvon et al., LOW-NOISE VOLTAGE AND CHARGE PREAMPLIFIERS FOR PHONON AND IONIZATION DETECTORS AT VERY-LOW TEMPERATURE, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 368(3), 1996, pp. 778-788
Citations number
19
Categorie Soggetti
Nuclear Sciences & Tecnology","Physics, Particles & Fields","Instument & Instrumentation",Spectroscopy
Journal title
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment → ACNP
ISSN journal
01689002
Volume
368
Issue
3
Year of publication
1996
Pages
778 - 788
Database
ISI
SICI code
0168-9002(1996)368:3<778:LVACPF>2.0.ZU;2-F
Abstract
We have developed voltage and charge sensitive FET preamplifiers which feature ultra low noise, convenience and flexibility for phonon and i onization detectors operated at 20 mK. With an NJ132L J-FET, the white noise of the voltage amplifier is 1.1 nV/root Hz at room temperature and 0.9 nV/root Hz when the FET is cooled to approximate to 120 K; the 1/f knee is below 100 Hz. The power dissipation of the FET, about 7 m W in our application, allows it to be used in a 4 K environment. With the same cooled FET, the charge amplifier has shown a noise of 120 e(- ) rms with a total input capacitance of 45 pF.