Very low noise cooled audiofrequency preamplifier for gravitational research

Journal Article · Wed Jul 01 00:00:00 EDT 1981 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1136712· OSTI ID:6457596

Bordoni, F; Maggi, G; Ottaviano, A; Pallottino, G V

We describe a low-frequency amplifier whose front end, realized with field effect transistors, is cooled at the temperature of 150 K. The results of the measurement of the noise voltage and of the noise current are given as a function of both frequency and temperature. The amplifier has an optimum noise temperature of 25 mK at 1.8 kHz with a source resistance of 390 k..cap omega.. and has been used in connection with a gravitational wave antenna of the Rome group.

• Research Organization: Istituto Plasma Spazio, CNR, C.P. 27, Frascati, Italy, and Istituto di Fisica ''G. Marconi'', Universita degli Studi di Roma, Rome, Italy
• OSTI ID: 6457596
• Journal Information: Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 52:7; ISSN RSINA
• Country of Publication: United States
• Language: English

Related Subjects

640106* -- Astrophysics & Cosmology-- Cosmology
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFIERS
COOLING
CURRENTS
ELECTRIC CURRENTS
ELECTRIC POTENTIAL
ELECTRONIC EQUIPMENT
EQUIPMENT
FREQUENCY DEPENDENCE
FREQUENCY RANGE
GRAVITATIONAL WAVE DETECTORS
HZ RANGE
KHZ RANGE
LOW TEMPERATURE
MEASURING INSTRUMENTS
NOISE
OPTIMIZATION
RADIATION DETECTORS
TEMPERATURE DEPENDENCE