Print Email Facebook Twitter Fabrication and characteriation of Josephson parametric amplifiers Title Fabrication and characteriation of Josephson parametric amplifiers Author de Jong, Matthijs (TU Delft Applied Sciences) Contributor Corveira Rodrigues, Inês (mentor) Bothner, Daniel (mentor) Steele, Gary (mentor) Kuipers, Kobus (graduation committee) Endo, Akira (graduation committee) Degree granting institution Delft University of Technology Date 2018-10-17 Abstract In this thesis, a we have designed and fabricated a Josephson Parametric Amplifier (JPA) using a new double-angle evaporation method without a Dolan bridge. We have found and resolved several issues in the fabrication procedure, but it requires further tuning before being fully functional. We have also simulated the behaviour of a general parametric amplifier with an additional Duffing non-linear term, and found that this term appears to limit the oscillation amplitude. We have attempted to characterize Josephson junctions fabricated with the new double-angle evaporation procedure, but without much success. Using a different fabrication method, a JPA was made and successfully characterized. The maximum measured gain is 16 dB, with a bandwidth of 1 MHz. The noise temperature is comparable to the cryostat temperature of 250 mK, but it was not characterized accurately. Subject Josephson JunctionsParametric resonanceamplifier To reference this document use: http://resolver.tudelft.nl/uuid:e0c8ddbf-0767-46e6-8138-715e3ccbbd05 Part of collection Student theses Document type master thesis Rights © 2018 Matthijs de Jong Files PDF ThesisMatthijs.pdf 22.67 MB Close viewer /islandora/object/uuid:e0c8ddbf-0767-46e6-8138-715e3ccbbd05/datastream/OBJ/view