CfAS scientist Martina Esposito, working in the Leek group, developed a Josephson parametric amplifier (JPA) based on a lumped-element LC resonator which includes an array of superconducting quantum interference devices (SQUIDs). The main figures of merit of the device are a bandwidth BW = 15 MHz, a maximum gain G = 21 dB and a 1-dB compression point of -115 dBm. The characterization of the gain of the amplifier is shown in the figure.
Post date: 01/23/2019 - 09:04
CFAS scientists discover record critical current densities in a stoichiometric iron-based superconductor
Post date: 08/31/2018 - 12:55
Researchers from Oxford’s Centre for Applied Superconductivity (CfAS) in Oxford Physics have uncovered the impressive properties of a novel superconductor, marking it out as the best of its kind with huge technological potential. The novel material in question, CaKFe4As4, was first synthesised only a couple of years ago both in Japan and Ames Laboratory, USA. Remarkably, its critical current density in single crystals was found to exceed that of all known iron-based superconductors, with a value of around 107 A/cm2.
Post date: 09/24/2017 - 21:40
Members of the CfAS team were treated to a fabulous tour of the CERN facility by Glynn Kirby. As well as going into the LHC control room, we saw Nb3Sn Rutherford cable winding, all the stages of full-scale Nb3Sn magnet manufacture and the magnet development lab. The EUCAS conference social also took place on the CERN site at the cryogenic magnet testing station.