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Quasiparticle Trapping in Microwave Kinetic Inductance Strip Detectors

Moore, D. C. and Mazin, B. A. and Golwala, S. and Bumble, B. and Gao, J. and Young, B. A. and McHugh, S. and Day, P. K. and LeDuc, H. G. and Zmuidzinas, J. (2009) Quasiparticle Trapping in Microwave Kinetic Inductance Strip Detectors. In: The Thirteenth International Workshop on Low Temperature Detectors - LTD 13. AIP Conference Proceedings . No.1185. American Institute of Physics , Melville, NY, pp. 168-171. ISBN 978-0-7354-0751-0.

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Microwave Kinetic Inductance Detectors (MKIDs) are thin-film, superconducting resonators, which are attractive for making large detector arrays due to their natural frequency domain multiplexing at GHz frequencies. For X-ray to IR wavelengths, MKIDs can provide high-resolution energy and timing information for each incoming photon. By fabricating strip detectors consisting of a rectangular absorber coupled to MKIDs at each end, high quantum efficiency and spatial resolution can be obtained. A similar geometry is being pursued for phonon sensing in a WIMP dark matter detector. Various materials have been tested including tantalum, tin, and aluminum for the absorbing strip, and aluminum, titanium, and aluminum manganese for the MKID. Initial Ta/Al X-ray devices have shown energy resolutions as good as 62 eV at 6 keV. A Ta/Al UV strip detector with an energy resolution of 0.8 eV at 4.9 eV has been demonstrated, but we find the coupling of the MKIDs to the absorbers is unreliable for these thinner devices. We report on progress probing the thicknesses at which the absorber/MKID coupling begins to degrade by using a resonator to inject quasiparticles directly into the absorber. In order to eliminate the absorber/MKID interface, a modified design for implanted AlMn/Al UV strip detectors was developed, and results showing good transmission of quasiparticles from the absorber to MKID in these devices are presented.

Item Type:Book Section
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Golwala, S.0000-0002-1098-7174
Additional Information:© 2009 American Institute of Physics. Issue Date: 16 December 2009. This research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. We would like to thank the JPL Research and Technology Development program, and the Gordon and Betty Moore foundation, for their generous support.
Funding AgencyGrant Number
JPL Research and Technology Development FundUNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Subject Keywords:Microwave kinetic inductance detectors; strip detectors; WIMP dark matter detectors; quasiparticle trapping
Series Name:AIP Conference Proceedings
Issue or Number:1185
Classification Code:PACS: 85.25.Oj, 95.35.+d
Record Number:CaltechAUTHORS:20100928-102341883
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Official Citation:Quasiparticle Trapping in Microwave Kinetic Inductance Strip Detectors D. C. Moore, B. A. Mazing, S. Golwala, B. Bumble, J. Gao, B. A. Young, S. McHugth, P. K. Day, H. G. LeDuc, and J. Zmuidzinas, AIP Conf. Proc. 1185, 168 (2009), DOI:10.1063/1.3292307
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:20182
Deposited By: Jason Perez
Deposited On:14 Oct 2010 17:24
Last Modified:03 Oct 2019 02:06

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