| Paper | Title | Page |
|---|
| TUP49 | ECR Plasma Cleaning: An In-situ Processing Technique for RF Cavities | 243 |
| | - G. Wu, H. Jiang, T. Khabiboulline, I. Pechenezhskiy, T. Koeth, J. Reid, W. Muranyi, B. Tennis, E. Harms, Y. Terechkine, H. Edwards, D. Mitchell, A. Rowe, C. Boffo, C. Cooper, L. Cooley, R. Schuessler
Fermilab - W. -D. Moeller
DESY Hamburg - C. Antoine
CEA-Saclay - A. Romanenko
Cornell University
| |
| | A condition for Electron Cyclotron Resonance (ECR)
can be established inside a fully assembled RF cavity
without the need for removing high-power couplers. As
such, plasma generated by this process can be used as a
final cleaning step, or as an alternative cleaning step in
place of other techniques. We will describe the current
effort to study plasma cleaning by ECR in a 3.9GHz
cavity. | |
| WEP14 | Commissioning and early operating experience with the Fermilab horizontal test facility | 469 |
| | - R. Carcagno, B. Chase, E. Harms, A. Hocker, P. Prieto, J. Reid, A. Rowe, J. Theilacker, M. Votava
Fermilab
| |
| | Fermilab has constructed a facility for testing dressed
superconducting radiofrequency (RF) cavities at 1.8 K
with high-power pulsed RF. This test stand was designed
to test both 9-cell 1.3 GHz TESLA-style cavities and 9-
cell 3.9 GHz cavities being built by Fermilab for DESY's
TTF-FLASH facility. An overview of the test stand and a
description of its initial commissioning is described here. | |
| WEP17 | Considerations on the third harmonic RF of the European XFEL | 481 |
| | - E. Vogel, M. Dohlus, M. Huening, K. Jensch, A. Matheisen, W. -D. Moeller, A. Schmidt, W. Singer
DESY Hamburg - H. Edwards, E. Harms, T. Khabiboulline
Fermilab
| |
| | Ultra short bunches with high peak current are required for the creation of high brilliance coherent light in the x-ray range in undulators. At the European x-ray free electron laser (XFEL) they will be obtained by a two stage bunch compression scheme based on off the rf field crest acceleration and transverse magnetic chicanes. The deviation of the rf field's sine shape from a straight line leads to long bunch tails and reduce peak current. This effect will be eliminated by adding a third harmonic rf system. The paper surveys the basic principle for the third harmonic rf, the most relevant design parameters, the actual status of beam physical examinations and potential concepts for the technical realization. | |
| WEP41 | Status of 3.9 GHz superconducting RF cavity technology at Fermilab | 575 |
| | - E. Harms, T. Arkan, L. Bellantoni, H. Carter, H. Edwards, M. Foley, I. Gonin, T. Khabiboulline, D. Mitchell, D. Olis, A. Rowe, N. Solyak
Fermilab
| |
| | Fermilab is involved in an effort to assemble 3.9 GHz
superconducting RF cavities into a four cavity
cryomodule for use at the DESY TTF/FLASH facility as a
third harmonic structure. The design gradient of the
cavities is 14 MV/m. This effort involves design,
fabrication, intermediate testing, assembly, and eventual
delivery of the cryomodule. We report on all facets of this
enterprise from design through future plans. Included will
be test results of single 9-cell cavities, lessons learned,
and current status. | |