Berlin 2012 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 41: Focused Session: Cryogenic Detectors
TT 41.2: Hauptvortrag
Donnerstag, 29. März 2012, 15:30–16:00, H 2053
Kinetic Inductance Detectors — •Jochem Baselmans — SRON Utrecht, The Netherlands
Microwave Kinetic Inductance Detectors, MKIDs, combine device simplicity, intrinsic multiplexing capability and a good sensitivity for radiation detection from the UV to the sub-mm part of the electromagnetic spectrum and for high energy particle detection. As a consequence MKIDs are now being developed in a plethora of varieties and for many different applications. Especially at Far Infra-Red-wavelengths band MKIDs offer the possibility to increase the size of detector arrays enormously, which if realized will undoubtedly revolutionize far-infrared astronomy. Arrays for the FIR currently reach photon noise limited performance and a high level of technological maturity, illustrated by the successful demonstration of increasingly large arrays at several ground based observatories such as the CSO, IRAM and APEX. I will address the fundamental limit in device performance, which is due to excess quasiparticle excitations at low bath temperatures < Tc/10 and possible mitigation strategies. I will also discuss recent progress in detector multiplexing: Using a single coax cable and one cryogenic microwave amplifier we can read out hundreds of pixels with photon noise limited performance.