Reducing field emission in superconducting RF cavities for the next generation of particle accelerators
| Autor: | David T. Rubin, R. Noer, A. Leibovich, J. Kirchgessner, J. Sears, W. Hartung, D. Moffat, Hasan Padamsee, Q.S. Shu |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Superconductivity
Materials science Field (physics) chemistry.chemical_element Particle accelerator Temperature measurement Linear particle accelerator Electronic Optical and Magnetic Materials law.invention Field electron emission chemistry law Electrical and Electronic Engineering Atomic physics Helium Common emitter |
| Zdroj: | IEEE Transactions on Magnetics. 27:1935-1939 |
| ISSN: | 1941-0069 0018-9464 |
| Popis: | Heat treatment up to 1500 degrees C in an ultrahigh-vacuum furnace, along with processing of cavities and temperature mapping was used to suppress field emission and analyze emitter properties. In 27 tests of one-cell 1500-MHz fired accelerating cavities, on the average the accelerating field, E/sub acc/, increased to 24 MV/m (H/sub pk/=1250 Oe) from 13 MV/m with chemical treatment alone; the highest E/sub acc/ reached was 30.5 MV/m. Emitter properties, efficiency of He processing, and results of the exposure of well-processed RF surfaces to various media are also discussed. |
| Databáze: | OpenAIRE |
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