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@ARTICLE{Liarte:826190,
author = {Liarte, Danilo B and Posen, Sam and Transtrum, Mark K and
Catelani, Gianluigi and Liepe, Matthias and Sethna, James P},
title = {{T}heoretical estimates of maximum fields in
superconducting resonant radio frequency cavities: stability
theory, disorder, and laminates},
journal = {Superconductor science and technology},
volume = {30},
number = {3},
issn = {1361-6668},
address = {Bristol},
publisher = {IOP Publ.},
reportid = {FZJ-2017-00436},
pages = {033002 -},
year = {2017},
abstract = {Theoretical limits to the performance of superconductors in
high magnetic fields parallel to their surfaces are of key
relevance to current and future accelerating cavities,
especially those made of new higher-T c materials such as
Nb3Sn, NbN, and MgB2. Indeed, beyond the so-called
superheating field ${H}_{\mathrm{sh}}$, flux will
spontaneously penetrate even a perfect superconducting
surface and ruin the performance. We present intuitive
arguments and simple estimates for ${H}_{\mathrm{sh}}$, and
combine them with our previous rigorous calculations, which
we summarize. We briefly discuss experimental measurements
of the superheating field, comparing to our estimates. We
explore the effects of materials anisotropy and the danger
of disorder in nucleating vortex entry. Will we need to
control surface orientation in the layered compound MgB2?
Can we estimate theoretically whether dirt and defects make
these new materials fundamentally more challenging to
optimize than niobium? Finally, we discuss and analyze
recent proposals to use thin superconducting layers or
laminates to enhance the performance of superconducting
cavities. Flux entering a laminate can lead to so-called
pancake vortices; we consider the physics of the dislocation
motion and potential re-annihilation or stabilization of
these vortices after their entry.},
cin = {PGI-2},
ddc = {530},
cid = {I:(DE-Juel1)PGI-2-20110106},
pnm = {144 - Controlling Collective States (POF3-144)},
pid = {G:(DE-HGF)POF3-144},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000392203800001},
doi = {10.1088/1361-6668/30/3/033002},
url = {https://juser.fz-juelich.de/record/826190},
}