Journal Article

FZJ-2015-07258

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Shielding Superconductors with Thin Films as Applied to rf Cavities for Particle Accelerators

Posen, S. (Corresponding author) ; Transtrum, M. K. ; Catelani, G.FZJ* ; Liepe, M. U. ; Sethna, J. P.

2015
American Physical Society College Park, Md. [u.a.]

This record in other databases:    

Please use a persistent id in citations: http://hdl.handle.net/2128/9552  doi:10.1103/PhysRevApplied.4.044019

Abstract: Determining the optimal arrangement of superconducting layers to withstand large-amplitude ac magnetic fields is important for certain applications such as superconducting radio-frequency cavities. In this paper, we evaluate the shielding potential of the superconducting-film–insulating-film–superconductor (SIS′) structure, a configuration that could provide benefits in screening large ac magnetic fields. After establishing that, for high-frequency magnetic fields, flux penetration must be avoided, the superheating field of the structure is calculated in the London limit both numerically and, for thin films, analytically. For intermediate film thicknesses and realistic material parameters, we also solve numerically the Ginzburg-Landau equations. It is shown that a small enhancement of the superheating field is possible, on the order of a few percent, for the SIS′ structure relative to a bulk superconductor of the film material, if the materials and thicknesses are chosen appropriately.

---

Contributing Institute(s):

1. Theoretische Nanoelektronik (PGI-2)

Research Program(s):

1. 144 - Controlling Collective States (POF3-144) (POF3-144)

Appears in the scientific report 2015

---

Database coverage:
; ; ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

---