A stabilizer for superconducting quantum interference device gradiometers for operation in lightly shielded environments

Yokosawa, Koichi; Kandori, Akihiko; Miyashita, Tsuyoshi; Suzuki, Daisuke; Tsukada, Keiji; Tsukamoto, Akira
May 2003
Applied Physics Letters;5/5/2003, Vol. 82 Issue 18, p3059
Academic Journal
A stabilizer for superconducting quantum interference device (SQUID) magnetometers operating in lightly shielded environments is proposed. When the stabilizer is applied in an electrical gradiometer, which operates by obtaining differences between the outputs of the two SQUID magnetometers, the intrinsic noise of the stabilizer can be neglected. The operation of an electrical gradiometer where the SQUID magnetometers are of the high-critical-temperature (high-T[sub c]) type is shown to be substantially more stable in a lightly magnetically shielding cylinder with the addition of the stabilizer function. Very clear magnetocardiograms were obtained by a gradiometer of this type.


Related Articles

  • Precursor diamagnetism above the superconducting transition in YNi2 B2 C. Lascialfari, A.; Mishonov, T.; Rigamonti, A.; Zucca, I.; Behr, G.; Loser, W.; Drechsler, S. L. // European Physical Journal B -- Condensed Matter;Oct2003, Vol. 35 Issue 3, p325 

    Presents a study which examined the high-resolution superconducting quantum interference devices magnetization measurements in a single crystal of a superconductor. Theoretical background; Methodology; Results.

  • Schrodinger's cat is now fat. Blatter, Gianni // Nature;7/6/2000, Vol. 406 Issue 6791, p25 

    Discusses whether quantum mechanics can be applied to large scale models. Rules of quantum mechanics, such as particles propagate like waves and can be in two or more states at the same time; Questions whether quantum mechanics can be applied to a macroscopic world arising from Schrodinger's...

  • Low temperature magnetic susceptometer based upon a dc superconducting quantum interference device. Read, Dan; Terry, Ian; Giblin, Sean R. // Review of Scientific Instruments;Oct2006, Vol. 77 Issue 10, p103906 

    A low temperature magnetic susceptometer was constructed by combining an Oxford Instruments Heliox probe sorption pumped 3He cryostat with a Quantum Design model 5000 dc superconducting quantum interference device sensor, giving an effective temperature range from 300 mK to 4.2 K. The smallest...

  • squid.  // Hutchinson Dictionary of Scientific Biography;2005, p1 

    Acronym for superconducting quantum interference device that makes use of the Josephson effect to produce a highly sensitive magnetic field detection system, or an ultra-fast switching device for use in computers.

  • 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.


Read the Article


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

Try another library?
Sign out of this library

Other Topics