Transition-edge sensor: Difference between revisions

Revision as of 14:43, 30 July 2011

Revision as of 13:51, 31 July 2011

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A '''transition edge sensor''' or '''TES''' is a type of [[cryogenic particle detector]] that exploits the strongly temperature-dependent [[Electrical resistance|resistance]] of the [[Superconductor#Superconducting phase transition|superconducting phase transition]]. [[File:NIST_Tungsten_Transition_Edge_Sensor.png|thumb|Optical image of four tungsten transition edge sensors for near-infrared single-photon detection. Image credit: National Institute of Standards and Technology, Boulder, CO[[NIST]].]]

A '''transition edge sensor''' or '''TES''' is a type of [[cryogenic particle detector]] that exploits the strongly temperature-dependent [[Electrical resistance|resistance]] of the [[Superconductor#Superconducting phase transition|superconducting phase transition]].

==Principle of Operationoperation==

A TES consists of a small volume of [[superconductivity|superconducting]] material that is cooled below its superconducting critical temperature and electrically biased on the superconducting transition. In this state, the device has a finite [[electrical resistance]] that is less than the resistance in the fully non-superconducting state. Energy coupled to the detector increases its temperature, pushing it further into the non-superconducting state and thereby increasing its electrical resistance. This increase in resistance can be used to detect very small changes in temperature, and hence in energy. TESs are commonly operated with low noise [[SQUID]] readouts. The low input impedance of the SQUID provides negative electrothermal feedback that can significantly speed up the device response and improve the energy resolution.<ref>K. D. Irwin and G. C. Hilton, "Transition-Edge Sensors," ''Cryogenic Particle Detection'', ed. C. Enss, Springer, 2005.</ref>

==Applications==

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[[Category:Measuring instruments]]

[[Category:Particle detectors]]

{{Physics-stub}}

[[ja:超伝導転移端センサー]]