TITLE

Microwave SQUID multiplexer

AUTHOR(S)
Irwin, K. D.; Lehnert, K. W.
PUB. DATE
September 2004
SOURCE
Applied Physics Letters;9/13/2004, Vol. 85 Issue 11, p2107
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We describe a superconducting quantum interference device (SQUID) multiplexer operated at microwave frequencies. The outputs of multiple SQUIDs are simultaneously modulated at different frequencies and summed into the input of one high electron mobility transistor (HEMT). The large bandwidth and dynamic range provided by HEMT amplifiers should make it possible to frequency-division multiplex a large number of SQUIDs in one output coaxial cable. We measure low SQUID noise (∼0.5 μø0√Hz at 4 K) and demonstrate the multiplexed readout of two direct current (dc) SQUIDs at different resonant frequencies. In this work, dc SQUIDs are used, hut this approach is equally applicable to radio-frequency SQUIDs.
ACCESSION #
14434561

 

Related Articles

  • Simulation of the superconducting multiturn flux transformer integrated with a coplanar resonator. Yi, H. R.; Yi, H.R.; Zhang, Y.; Klein, N. // Applied Physics Letters;6/12/2000, Vol. 76 Issue 24 

    The analysis of the structure of a superconducting multiturn flux transformer integrated with a coplanar resonator for radio-frequency superconducting quantum interference devices is described. Electromagnetic simulations indicate that the loss is dominated by the high loss tangent of the...

  • Flux-Ramp Modulation for SQUID Multiplexing. Mates, J.; Irwin, K.; Vale, L.; Hilton, G.; Gao, J.; Lehnert, K. // Journal of Low Temperature Physics;Jun2012, Vol. 167 Issue 5/6, p707 

    SQUIDs are typically operated in a flux-locked loop to linearize their response to input flux. However, a flux-locked loop is not possible with a microwave SQUID multiplexer. We describe an alternative technique called flux-ramp modulation and report its successful implementation.

  • Demonstration of a multiplexer of dissipationless superconducting quantum interference devices. Mates, J. A. B.; Hilton, G. C.; Irwin, K. D.; Vale, L. R.; Lehnert, K. W. // Applied Physics Letters;1/14/2008, Vol. 92 Issue 2, p023514 

    We report on the development of a microwave superconducting quantum interference device (SQUID) multiplexer to read out arrays of low-temperature detectors. In this frequency-division multiplexer, superconducting resonators with different frequencies couple to a common transmission line and each...

  • Self-organization of the critical state in a chain of SQUIDs. Ginzburg, S. L.; Savitskaya, N. E. // JETP Letters;11/10/98, Vol. 68 Issue 9, p719 

    The critical state of a 1D granular superconductor (modeled as a chain of SQUIDs or, in other words, a 1D Josephson-junction array) is studied on the basis of a system of differential equations for the gauge-invariant phase difference. It is established that the critical state is self-organized....

  • Alpha-axis tilt grain boundaries for YBa[sub 2]Cu[sub 3]O[sub 7 - x] superconducting quantum... Testa, G.; Sarnelli, E. // Applied Physics Letters;11/29/1999, Vol. 75 Issue 22, p3542 

    Studies the alpha-axis tilt grain boundaries for YBa[sub2]Cu[sub3]O{sub7-x] superconducting quantum interference devices. Absence of pi junctions; Grain-boundary junctions based ont eh step-edge technique.

  • Modeling the direct current superconducting quantum interference device coupled to the multiturn input coil. II. Enpuku, K.; Cantor, R.; Koch, H. // Journal of Applied Physics;3/1/1992, Vol. 71 Issue 5, p2338 

    Deals with a study which developed a circuit model of a direct current superconducting quantum interference devices with a closely coupled input coil. Background to the study; Description of the model; Numerical results.

  • Theory of signal and noise performance of superconducting quantum interferometers with two quantization loops. Greenberg, Y. S.; Krivoy, G. S.; Koch, H. // Journal of Applied Physics;5/1/1995, Vol. 77 Issue 9, p4783 

    Focuses on a study which developed a theory of double signal and noise performance of superconducting quantum interferometer with two quantization loops (D-SQUID). Types of SQUID; Critical points of D-SQUID; Interaction of the D-SQUID with a tank circuit; Noise properties of SQUID.

  • Highly balanced long-baseline single-layer high-T[sub c] superconducting quantum interference... Eulenburg, A.; Romans, E.J. // Applied Physics Letters;10/11/1999, Vol. 75 Issue 15, p2301 

    Describes a direct-current superconducting quantum interference device first-order gradiometer. Baseline and intrinsic balance; Gradient sensitivity; Coupling scheme employed to optimize the device's balance.

  • Design of multiloop input circuits for high-Tc superconducting quantum interference magnetometers. Zarembinski, S.; Claeson, T. // Journal of Applied Physics;9/1/1992, Vol. 72 Issue 5, p1918 

    Presents a study that developed a technique for the design of input circuits of superconducting quantum interference devices (SQUID) including those based on high transition temperature superconductors. Optimization of the multitransformer SQUID structures; Derivation of general equations for a...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics