A three channel SQUID-system using a multiplexed readout

Conference · Thu Feb 28 23:00:00 EST 1991 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:6047719

Muck, M ^[1]

---

1. Institute of Thin Film and Ion Technology, Research Centre Julich GmbH, P.O. Box 1913, 5170 Julich (DE)

This paper reports on conventional multichannel SQUID systems which require a number of wires connecting the individual SQUIDs and feedback coils to the room temperature electronics. In order to reduce the heat transport by these wires and to avoid the accompanied increased helium losses, we studied the possibility of using a multiplexed readout, requiring only a fraction of feed lines than needed by conventional systems. The authors used rf-SQUIDs in our experiments to avoid additional wires for dc-bias currents. A bias frequency of 100 MHz was chosen to achieve a sufficiently low flux-noise. The influence of modulation frequency and multiplexing frequency on the stability of the flux-locked loop and on the slew rate of the system was studied in some detail.

• OSTI ID: 6047719
• Report Number(s): CONF-900944--
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Vol. 27:2; ISSN IEMGA; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DESIGN
ELECTRONIC EQUIPMENT
ELEMENTS
ENERGY LOSSES
ENERGY TRANSFER
EQUIPMENT
FLUIDS
FLUXMETERS
GASES
HEAT TRANSFER
HELIUM
LATTICE PARAMETERS
LOSSES
MAGNETIC FLUX
MEASURING INSTRUMENTS
MICROELECTRONICS
MICROWAVE EQUIPMENT
MODE LOCKING
MULTI-CHANNEL ANALYZERS
NONMETALS
OPTIMIZATION
PULSE ANALYZERS
RARE GASES
RF SYSTEMS
SQUID DEVICES
SUPERCONDUCTING DEVICES
SUPERCONDUCTING WIRES
WIRES