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Code-division SQUID multiplexing

机译：码分SQUID多路复用

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摘要

Multiplexed superconducting quantum interference device (SQUID) readout systems are critical for measuring large arrays of superconducting transition-edge sensors (TES). We demonstrate a code-division SQUID multiplexing (CDM) architecture that is modulated by Walsh codes. Measurements and simulations of a prototype multiplexer show that this modulation scheme is not degraded by SQUID-noise aliasing, suppresses parasitic pickup, and has low levels of crosstalk. These properties enable this architecture to scale to large TES arrays. fuerthermore, CDM modulation suppresses the 1 / f knee in the noise to below 20 mHz, suggesting the use of this circuit for low-frequency-noise mitigation in more general SQUID applications.
机译：多路复用超导量子干扰设备（SQUID）读出系统对于测量大型超导过渡边缘传感器（TES）阵列至关重要。我们演示了由Walsh码调制的码分SQUID复用（CDM）体系结构。原型多路复用器的测量和仿真表明，这种调制方案不会因SQUID噪声混叠而降低，抑制了寄生拾取，并且串扰水平较低。这些属性使该体系结构可以扩展到大型TES阵列。此外，CDM调制可将噪声中的1 / f拐点抑制到20 mHz以下，这表明该电路可用于更一般的SQUID应用中的低频噪声消除。

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  • 来源
    《Applied Physicsletters》 |2010年第16期|163509.1-163509.3|共3页
  • 作者

    M. D. Niemack; J. Beyer; H. M. Cho; W. B. Doriese; G. C. Hilton; K. D. Irwin; C. D. Reintsema; D. R. Schmidt; J. N. Ullom; L. R. Vale;

  • 作者单位

    National Institute of Standards and Technology, 325 Broadway, MC 817.03, Boulder, Colorado 80305, USA;

    rnPhysikalisch-Technische Bundesanstalt (PTB), Abbestrasse 2-12, D-10587 Berlin, Germany;

    rnNational Institute of Standards and Technology, 325 Broadway, MC 817.03, Boulder, Colorado 80305, USA;

    rnNational Institute of Standards and Technology, 325 Broadway, MC 817.03, Boulder, Colorado 80305, USA;

    rnNational Institute of Standards and Technology, 325 Broadway, MC 817.03, Boulder, Colorado 80305, USA;

    rnNational Institute of Standards and Technology, 325 Broadway, MC 817.03, Boulder, Colorado 80305, USA;

    rnNational Institute of Standards and Technology, 325 Broadway, MC 817.03, Boulder, Colorado 80305, USA;

    rnNational Institute of Standards and Technology, 325 Broadway, MC 817.03, Boulder, Colorado 80305, USA;

    rnNational Institute of Standards and Technology, 325 Broadway, MC 817.03, Boulder, Colorado 80305, USA;

    rnNational Institute of Standards and Technology, 325 Broadway, MC 817.03, Boulder, Colorado 80305, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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