Title :
Directly coupled electronics for HTSC DC SQUID based magnetometer
Author :
Gudoshnikov, S.A. ; Ukhansky, N.N. ; Vengrus, I.I. ; Matveets, L.V. ; Andreev, K.E. ; Snigirev, O.V. ; Kras, S.I.
Author_Institution :
Inst. of Terrestrial Magnetism, Ionosphere & Radiowave Propagation, Acad. of Sci., Troitsk, Russia
Abstract :
A low-volume high-performance directly coupled electronics for the high-T/sub c/ DC SQUID magnetometers has been developed and tested. This electronics is based on a liquid nitrogen cooled preamplifier with the white noise level close to 0.25 nV/Hz/sup 1/2/, packed in the volume less than 3 cm/sup 3/ and results in a typical 3 dB bandwidth of about 1 MHz, maximum dynamic range 140 dB for frequencies up to 1 kHz and the maximum slew rate more than 10/sup 6/ flux quanta in second with a middle-quality DC SQUID sensor.
Keywords :
SQUID magnetometers; cryogenic electronics; high-temperature superconductors; low-temperature techniques; preamplifiers; 1 MHz; 1 kHz; 140 dB; DC SQUID sensor; HTSC; N/sub 2/; directly coupled electronics; high-T/sub c/ DC SQUID magnetometers; liquid N/sub 2/ cooled preamplifier; white noise; Bandwidth; Circuit noise; Coupling circuits; Ionosphere; Magnetic flux; Minimization; Physics; Reduced instruction set computing; SQUID magnetometers; Voltage;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 1996 Conference on
Conference_Location :
Braunschweig, Germany
Print_ISBN :
0-7803-3376-4
DOI :
10.1109/CPEM.1996.547105
