Beams Document 2667-v1

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Superconducting RF cavities and materials issues

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Submitted by:
Milorad B. Popovic
Updated by:
Milorad B. Popovic
Document Created:
27 Feb 2007, 14:05
Contents Revised:
27 Feb 2007, 14:05
Metadata Revised:
27 Feb 2007, 14:05
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The employ of Superconducting Radiofrequency cavities is main technology asset for the next generation international collider ILC. SRF technology is also widely used or foreseen in other particles accelerators, such as light sources (synchrotron, SASE-FEL, ERL) or high power hadrons beams for neutron sources and nuclear physics (SNS, ATLAS, RIA). Any of these applications can be very demanding in terms of specific performance, i.e. high accelerating gradient and/or low losses, but some of these specifications, achieved on lab scale, are not yet met on an industrial scale. Basic R&D on the material is a way to better understand the origin of degradation or dispersion of performances, and how to overcome it.
As a first step we will describe shortly the main particularities of RF superconductivity, then we will retrace the last 15 years of SRF R&D, and we will try to show how a better understanding of the physics of the RF superconductivity helped to overcome technical limitations. In the third part we will try to summarize the latest issues in cavities performances, well as the main research directions that need to be pursued.

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