| Paper |
Title |
Page |
| MOPKF076 |
An Overview of the Cryomodule for the Cornell ERL Injector
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491 |
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- H. Padamsee, B.M. Barstow, V. Medjidzade, V.D. Shemelin, K.W. Smolenski
Cornell University, Ithaca, New York
- I. Bazarov, C.K. Sinclair
Cornell University, Department of Physics, Ithaca, New York
- S.A. Belomestnykh, R. Geng, M. Liepe, M. Tigner, V. Veshcherevich
Cornell University, Laboratory for Elementary-Particle Physics, Ithaca, New York
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The first stage of the Cornell ERL project will be a 100 MeV, 100 mA (CW) prototype machine to study the energy recovery concept with high current, low emittance beams. In the injector, a bunched 100 mA, 500 keV beam of a DC gun will be compressed in a normal-conducting copper buncher and subsequently accelerated by five superconducting 2-cell cavities to an energy of 5.5 MeV. We will present an overview of the injector status to include the status of the cryomodule design along with the status of the 2-cell HOM-free cavity, the twin-input coupler and the ferrite HOM dampers in related papers.
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| TUPKF048 |
Studies of Electron Multipacting in CESR Type Rectangular Waveguide Couplers
|
1057 |
| |
- P. Goudket, M. Dykes
CCLRC/DL/ASTeC, Daresbury, Warrington, Cheshire
- S.A. Belomestnykh, R. Geng
Cornell University, Laboratory for Elementary-Particle Physics, Ithaca, New York
- R.G. Carter
Microwave Research Group, Lancaster University, Lancaster
- H. Padamsee
Cornell University, Ithaca, New York
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The latest results from an experimental waveguide section, as well as simulations from a model of electron multipacting using the MAGIC PIC code, are discussed. Tests were carried out on a new waveguide section that included enhanced diagnostics and the possibility of changing surface materials and temperature. Those tests evaluated grooves, ridges and surface coatings, such as TiN and a TiZrV NEG coating, as methods of multipactor suppression. The conclusion remains that the most effective method to achieve complete multipactor suppression remains the application of a static magnetic bias of approximately 10G. The experiments also provided good data sets that can be used to verify the accuracy of simulations. Simulations of the waveguide multipacting have been carried out and have offered better understanding of electronic behaviour.
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