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The role of engineered materials in superconducting tunnel junction X-ray detectors - Suppression of quasiparticle recombination losses via a phononic band gapAn engineered structure is proposed that can alleviate quasi-particle recombination losses via the existence of a phononic band gap that overlaps the 2-Delta energy of phonons produced during recombination of quasi-particles. Attention is given to a 1D Kronig-Penny model for phonons normally incident to the layers of a multilayered superconducting tunnel junction as an idealized example. A device with a high density of Bragg resonances is identified as desirable; both Nb/Si and NbN/SiN superlattices have been produced, with the latter having generally superior performance.
Document ID
19930045481
Document Type
Conference Paper
Authors
Rippert, Edward D. (NASA Headquarters Washington, DC United States)
Ketterson, John B. (NASA Headquarters Washington, DC United States)
Chen, Jun (NASA Headquarters Washington, DC United States)
Song, Shenian (NASA Headquarters Washington, DC United States)
Lomatch, Susanne (NASA Headquarters Washington, DC United States)
Maglic, Stevan R. (NASA Headquarters Washington, DC United States)
Thomas, Christopher (NASA Headquarters Washington, DC United States)
Cheida, M. A. (NASA Headquarters Washington, DC United States)
Ulmer, Melville P. (Northwestern Univ. Evanston, IL, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1992
Publication Information
Publication: In: EUV, X-ray, and gamma-ray instrumentation for astronomy III; Proceedings of the Meeting, San Diego, CA, July 22-24, 1992 (A93-29476 10-35)
Subject Category
SOLID-STATE PHYSICS
Funding Number(s)
CONTRACT_GRANT: NAGW-2859
CONTRACT_GRANT: NSF DMR-88-09864
Distribution Limits
Public
Copyright
Other