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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Benvenuti, C. Bernard, P. Bloess, D. Cavallari, G. Chiaveri, E. Haebel, E. Hilleret, N. Tuckmantel, J. Weingarten, W. |
| Copyright Year | 1991 |
| Description | Author affiliation: CERN, Geneva, Switzerland (Benvenuti, C.; Bernard, P.; Bloess, D.; Cavallari, G.; Chiaveri, E.; Haebel, E.; Hilleret, N.; Tuckmantel, J.; Weingarten, W.) |
| Abstract | Experience from the construction, assembly, and tests of two superconducting cavity modules for the Large Electron Positron colliding beam accelerator (LEP) are given. Each module consists of four individual four-cell 352 MHz Nb sputter-coated Cu cavities equipped with an RF power coupler, higher-order-mode (HOM,) dampers, and a frequency tuner, all housed in a single cryostat. The demountable HOM dampers of a new type designed for sputter-coated cavities allow Q/sub ext/ of 9000 for the HOMs with the largest (R/Q). Q values are higher (4.5 to 11*10/sup 9/) than those for similar Nb sheet cavities up to the maximum accelerating fields obtained (6 to 9.5 MV/m). The field limitation is electron loading and never thermal breakdown. Results on vertical tests of individual cavities are reported (Q value, maximum accelerating fields, residual resistance). They are complemented by results on horizontal tests of individual cavities, and on the fully equipped klystron-driven four-cavity module. |
| Starting Page | 1023 |
| Ending Page | 1025 |
| File Size | 267291 |
| Page Count | 3 |
| File Format | |
| ISBN | 0780301358 |
| DOI | 10.1109/PAC.1991.164525 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1991-05-06 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Niobium Copper Testing Modular construction Assembly Electron beams Positrons Colliding beam accelerators Radio frequency Tuners |
| Content Type | Text |
| Resource Type | Article |
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