Two different origins of the Q-slope problem in superconducting niobium film cavities for a heavy ion accelerator at CERN

Superconducting niobium film cavities deposited on copper substrates (Nb/Cu) have suffered from strong field-dependent surface resistance, often referred to as the Q-slope problem, since their invention. We argue that the Q-slope may not be an intrinsic problem, but rather originates from a combinat...

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Bibliographic Details
Main Authors: A. Miyazaki, W. Venturini Delsolaro
Format: Article
Language:English
Published: American Physical Society 2019-07-01
Series:Physical Review Accelerators and Beams
Online Access:http://doi.org/10.1103/PhysRevAccelBeams.22.073101