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Operation of a high-T-C SQUID gradiometer with a two-stage MEMS-based Joule-Thomson micro-cooler

Alexey Kalabukhov (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; E. J. de Hoon ; K. Kuit ; Ppppm Lerou ; M. Chukharkin ; J. F. Schneiderman ; S. Sepehri ; A. Sanz-Velasco ; Aldo Jesorka (Institutionen för kemi och kemiteknik, Fysikalisk kemi) ; Dag Winkler (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik)
Superconductor Science & Technology (0953-2048). Vol. 29 (2016), 9,
[Artikel, refereegranskad vetenskaplig]

Practical applications of high-T-C superconducting quantum interference devices (SQUIDs) require cheap, simple in operation, and cryogen-free cooling. Mechanical cryo-coolers are generally not suitable for operation with SQUIDs due to their inherent magnetic and vibrational noise. In this work, we utilized a commercial Joule-Thomson microfluidic two-stage cooling system with base temperature of 75 K. We achieved successful operation of a bicrystal high-T-C SQUID gradiometer in shielded magnetic environment. The micro-cooler head contains neither moving nor magnetic parts, and thus does not affect magnetic flux noise of the SQUID even at low frequencies. Our results demonstrate that such a microfluidic cooling system is a promising technology for cooling of high-T-C SQUIDs in practical applications such as magnetic bioassays.

Nyckelord: superconducting quantum interference device, micro-coolers, high-T-C planar SQUID gradiometers, cryocooler, system, sensor, noise, Physics, klich ah, 1994, applied physics letters, v64, p3494

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Denna post skapades 2016-10-28. Senast ändrad 2017-09-14.
CPL Pubid: 244412


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