J
John B Ketterson
Researcher at Northwestern University
Publications - 823
Citations - 18004
John B Ketterson is an academic researcher from Northwestern University. The author has contributed to research in topics: Thin film & Superconductivity. The author has an hindex of 60, co-authored 814 publications receiving 16929 citations. Previous affiliations of John B Ketterson include University of Virginia & University of California, Los Angeles.
Papers
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Technique to produce coherent X-ray radiation via laser pumping of a relativistic ion beam
TL;DR: In this paper, the level population of a beam of relativistic positive ions with Z≥2 having a single bound electron was inverted by the application of a "π pulse" of laser radiation tuned to the Doppler shifted 1s-2p transition.
Josephson Oscillators Based on Amorphous Superconductors
TL;DR: In this article , an experimental demonstration of an MoGe/Al/AlO/(Al)MoGe Josephson oscillator based on amorphous superconductor MoGe was presented, which allows for continuous tuning of the oscillation frequency from about 1 GHz up to tens of GHz.
Proceedings ArticleDOI
Macrospin reversals and spin wave softening in isolated nodes of Kagome-like structures: Statics and dynamics
Federico Montoncello,Loris Giovannini,John B Ketterson,Wonbae Bang,L. E. DeLong,Barry Farmer +5 more
TL;DR: In complex networks of ferromagnetic macrospins, like artificial spin ices or artificial quasi-crystals, much interest has focused on the dynamics of Dirac strings, i.e., the apparently irregular path followed by macrospin reversals, producing a magnetic charge drift across the network.
Journal ArticleDOI
Copper Wire Thermal Feedthrough for Use at Low Temperatures
TL;DR: In this article, the thermal link consists of several thousand small diameter copper wires which are capable of making good thermal contact to liquid helium while minimizing the effects of eddy current heating.
Journal ArticleDOI
Conduction electron scattering in quenched and annealed gold
TL;DR: In this paper, the de Haas-van Alphen (dHvA) Dingle (scattering) temperatures for a large number of cyclotron orbits were measured and the anisotropy of the conduction-electron scattering due to vacancies and stacking-fault tetrahedra (SFT) in quenched and subsequently annealed gold single crystals was studied.