| Paper |
Title |
Page |
| MOPP106 |
Study of Radiation From RF Cavities
|
805 |
| |
- R. Sandstrom
DPNC, Genève
- D. Huang
IIT, Chicago, Illinois
- J. Norem
ANL, Argonne, Illinois
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Essential for muon accelerators such as neutrino factories or muon colliders, ionization cooling channels use RF cavities to restore the energy lost in liquid hydrogen absorbers. One major limitation in cooling comes from electrons emitted from the cavities which can cause breakdowns or unacceptable thermal load to the liquid hydrogen vessels. In the Muon Ionization Cooling Experiment MICE, these electrons also cause background in the detectors. This paper presents simulations related to these dark currents, and analysis of data from a direct measurement of this radiation in the MuCool Test Area (MTA).
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| WEPP099 |
Results from Atomic Layer Deposition and Tunneling Spectroscopy for Superconducting RF Cavities
|
2749 |
| |
- J. Norem, J. W. Elam, M. J. Pellin
ANL, Argonne, Illinois
- C. Z. Antoine
CEA, Gif-sur-Yvette
- L. Cooley
Fermilab, Batavia, Illinois
- J. F. Moore
MassThink LLC, Naperville, IL
- Th. Proslier, J. Zasadzinski
IIT, Chicago, Illinois
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Atomic Layer Deposition is a process that synthesizes materials in successive monolayers, at rates on the order of 1 micron/hour. We have been using this technique at Argonne as a possible way to improve both superconducting rf (SCRF) and normal rf structure performance. Initial experiments have led to a new model of high field Q-slope and new ways of controlling SCRF surfaces, as well as suggesting ways to significantly improve the operating gradients of both superconducting and normal structures. We have also been testing this technique in superconducting structures. Initial measurements show significant improvement over “cavity-grade” Nb samples.
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