Optimization of advanced ACTPol transition edge sensor bolometer operation using R(T,I) transition measurements

Maria Salatino, Christine G. Pappas, Shawn W.H. Henderson, Laura Newburgh, Michael D. Niemack, Suzanne T. Staggs, Kasey Wagoner

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

In the current submm and mm cosmology experiments the focal planes are populated by kilopixel transition edge sensors (TESes). Varying incoming power load requires frequent rebiasing of the TESes through standard current-voltage (IV) acquisition. The time required to perform IVs on such large arrays and the resulting transient heating of the bath reduces the sky observation time. We explore a bias step method that significantly reduces the time required for the rebiasing process. This exploits the detectors' responses to the injection of a small square wave signal on top of the dc bias current and knowledge of the shape of the detector transition R(T,I). This method has been tested on two detector arrays of the Atacama Cosmology Telescope (ACT). In this paper, we focus on the first step of the method, the estimate of the TES %Rn.

Original languageEnglish (US)
Article number7865987
JournalIEEE Transactions on Applied Superconductivity
Volume27
Issue number4
DOIs
StatePublished - Jun 2017

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Keywords

  • Biasing
  • IV curve
  • Superconducting transition
  • Transition edge sensor (TES)

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