| Paper |
Title |
Page |
| MOPP121 |
Full Real-time Temperature Mapping System for 9-cell ILC-type Cavities
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841 |
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- A. Canabal, F. L. Krawczyk, R. J. Roybal, J. D. Sedillo, T. Tajima
LANL, Los Alamos, New Mexico
- S. Cohen
Bira, Albuquerque, New Mexico
- W. Haynes
Fermilab, Batavia, Illinois
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The mapping of outer-wall temperatures during the vertical test of a superconducting radio-frequency (SRF) cavity has been one of the most successful tools in detecting the cavities’ critical hot spots. However, due to the excessive number of sensors needed, no fixed-type temperature mapping (T-mapping) system that covers all cells has been built for 9-cell cavities. With the consensus that T-mapping analysis is needed in order to improve the yield of high-gradient cavities, a system with a reduced data acquisition time and increased temperature sensitivity, compared to rotating-arm systems, has been developed at Los Alamos National Laboratory. The system consists of ~5,000 100 Ω 1/8W Allen-Bradley resistors placed azimuthally every 10 degrees, a similar number of other resistors and diodes that implement the switching scheme, and data acquisition codes written in Labview. The details of the system and first results are presented and discussed.
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| MOPP158 |
Conceptual Design of Automated Systems for SRF Cavity Optical Inspection and Assembly
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922 |
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- T. Tajima, A. Canabal, T. A. Harden, R. J. Roybal
LANL, Los Alamos, New Mexico
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The International Linear Collider (ILC) will require ~16,000 Superconducting Radio-Frequency (SRF) cavities at an accelerating gradient of 31.5 MV/m. One of the critical issues that needs to be addressed is the insufficient yield of high-gradient cavities that meet the requirement. This paper describes the design and initial tests of a cavity inner surface optical inspection system. Combined with a full-featured 9-cell cavity temperature mapping system being developed at LANL, we hope to be able to correlate the cavity heating and the surface condition causing it.
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