Parallel superconducting strip-line detectors: reset behaviour in the single-strip switch regime

A. Casaburi, R. M. Heath, M. G. Tanner, R. Cristiano, M. Ejrnaes, C. Nappi, R. H. Hadfield

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Superconducting strip-line detectors (SSLDs) are an important emerging technology for the detection of single molecules in time-of-flight mass spectrometry (TOF-MS). We present an experimental investigation of a SSLD laid out in a parallel configuration, designed to address selected single strip-lines operating in the single-strip switch regime. Fast laser pulses were tightly focused onto the device, allowing controllable nucleation of a resistive region at a specific location and study of the subsequent device response dynamics. We observed that in this regime, although the strip-line returns to the superconducting state after triggering, no effective recovery of the bias current occurs, in qualitative agreement with a phenomenological circuit simulation that we performed. Moreover, from theoretical considerations and by looking at the experimental pulse amplitude distribution histogram, we have the first confirmation of the fact that the phenomenological London model governs the current redistribution in these large area devices also after detection events.

Original languageEnglish
Article number044029
Number of pages5
JournalSuperconductor Science and Technology
Volume27
Issue number4
Early online date18 Mar 2014
DOIs
Publication statusPublished - Apr 2014
Event11th European Conference on Applied Superconductivity - Genoa, Italy
Duration: 15 Sep 201319 Sep 2013

Keywords

  • cryogenic detector
  • superconducting strip-line detector
  • quantum sensors

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