Operation of transition-edge sensors with excess thermal noise

I.J. Maasilta; K.M. Kinnunen; A.K. Nuottajärvi; J. Leppäniemi; Arttu Luukanen

doi:10.1088/0953-2048/19/5/S16

Operation of transition-edge sensors with excess thermal noise

I.J. Maasilta (Corresponding Author), K.M. Kinnunen, A.K. Nuottajärvi, J. Leppäniemi, Arttu Luukanen

VTT Technical Research Centre of Finland

University of Jyväskylä

Research output: Contribution to journal › Article › Scientific › peer-review

7 Citations (Scopus)

Abstract

The superconducting transition-edge sensor (TES) is currently one of the most attractive choices for ultra-high resolution calorimetry in the keV x-ray band, and is being considered for future ESA and NASA missions. We have performed a study on the noise characteristics of Au/Ti bilayer TESs, at operating temperatures around ~100 mK, with the SQUID readout at 1.5 K. Experimental results indicate that without modifications the back-action noise from the SQUID chip degrades the noise characteristics significantly. We present a simple and effective solution to the problem: by installing an extra shunt resistor which absorbs the excess radiation from the SQUID input, we have reduced the excess thermal (photon) noise power down by approximately a factor of five, allowing high resolution operation of the sensors.

Original language	English
Pages (from-to)	S242-S245
Journal	Superconductor Science and Technology
Volume	19
DOIs	https://doi.org/10.1088/0953-2048/19/5/S16
Publication status	Published - 2006
MoE publication type	A1 Journal article-refereed

Keywords

transition edge sensors
calorimeters
SQUID
superconducting microwave devices
superconducting transistors

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10.1088/0953-2048/19/5/S16

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title = "Operation of transition-edge sensors with excess thermal noise",

abstract = "The superconducting transition-edge sensor (TES) is currently one of the most attractive choices for ultra-high resolution calorimetry in the keV x-ray band, and is being considered for future ESA and NASA missions. We have performed a study on the noise characteristics of Au/Ti bilayer TESs, at operating temperatures around ~100 mK, with the SQUID readout at 1.5 K. Experimental results indicate that without modifications the back-action noise from the SQUID chip degrades the noise characteristics significantly. We present a simple and effective solution to the problem: by installing an extra shunt resistor which absorbs the excess radiation from the SQUID input, we have reduced the excess thermal (photon) noise power down by approximately a factor of five, allowing high resolution operation of the sensors.",

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T1 - Operation of transition-edge sensors with excess thermal noise

AU - Maasilta, I.J.

AU - Kinnunen, K.M.

AU - Nuottajärvi, A.K.

AU - Leppäniemi, J.

AU - Luukanen, Arttu

PY - 2006

Y1 - 2006

N2 - The superconducting transition-edge sensor (TES) is currently one of the most attractive choices for ultra-high resolution calorimetry in the keV x-ray band, and is being considered for future ESA and NASA missions. We have performed a study on the noise characteristics of Au/Ti bilayer TESs, at operating temperatures around ~100 mK, with the SQUID readout at 1.5 K. Experimental results indicate that without modifications the back-action noise from the SQUID chip degrades the noise characteristics significantly. We present a simple and effective solution to the problem: by installing an extra shunt resistor which absorbs the excess radiation from the SQUID input, we have reduced the excess thermal (photon) noise power down by approximately a factor of five, allowing high resolution operation of the sensors.

AB - The superconducting transition-edge sensor (TES) is currently one of the most attractive choices for ultra-high resolution calorimetry in the keV x-ray band, and is being considered for future ESA and NASA missions. We have performed a study on the noise characteristics of Au/Ti bilayer TESs, at operating temperatures around ~100 mK, with the SQUID readout at 1.5 K. Experimental results indicate that without modifications the back-action noise from the SQUID chip degrades the noise characteristics significantly. We present a simple and effective solution to the problem: by installing an extra shunt resistor which absorbs the excess radiation from the SQUID input, we have reduced the excess thermal (photon) noise power down by approximately a factor of five, allowing high resolution operation of the sensors.

KW - transition edge sensors

KW - calorimeters

KW - SQUID

KW - superconducting microwave devices

KW - superconducting transistors

U2 - 10.1088/0953-2048/19/5/S16

DO - 10.1088/0953-2048/19/5/S16

M3 - Article

SN - 0953-2048

VL - 19

SP - S242-S245

JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

ER -

Operation of transition-edge sensors with excess thermal noise

Abstract

Keywords

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