Moeller W.-D.

Paper	Title	Page
TUP47	Diagnostic Instrumentation for the Fermilab Vertical Cavity Test Facility	235
	C. M. Ginsburg, R. Carcagno, M. Champion, N. Dhanaraj, A. Lunin, A. Mukherjee, R. Nehring, D. Orris, J. P. Ozelis, V. Poloubotko, D. A. Sergatskov Fermilab W. -D. Moeller DESY
	We describe the design and initial test results of the Fermilab vertical cavity test facility (VCTF) diagnostic instrumentation which is used to understand cavity performance, including thermometry to detect hot spots caused by quenches or field emission, and a variable RF input coupler to facilitate the TM010 passband mode measurements used to isolate poorly performing cells.
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.
WEP05	Testing the FLASH superconducting accelerating modules	442
	D. Kostin, W. -D. Moeller, A. Goessel, R. Lange DESY Hamburg
	The Free-electron LASer in Hamburg (FLASH), operating in the VUV wavelengths range, is not only the outstanding research facility in Europe, but also the test bench for the ILC superconducting linac technology. Started XFEL, as well as planned ILC, both depend on the progress made here. [1], [2], [3]. New module test stand was recently put into operation at DESY. The FLASH linac has been upgraded to 6 superconducting modules. The accelerating modules testing experience and the results of the tests are put in the base of this paper, describing the recent developments of the XFEL / ILC technology.
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.
TH202	Industrialization process for XFEL power couplers and volume manufacturing	734
	S. Prat LAL, Univ.  Paris-Sud and IN2P3/CNRS W. -D. Moeller, D. Kostin DESY
	The XFEL (European X-Ray Free-Electron Laser) is a new international large-scale research infrastructure to be built in the north west of Hamburg, Germany [1], [2]. The power coupler TTF3, developed at DESY for TESLA was chosen to be the first choice for the XFEL. For further development, testing and conditioning of the power coupler a collaboration is working between LAL, Orsay and DESY, Hamburg since 2004. Up to 60 power couplers of the TTF3 type are fabricated, conditioned and under operation at the TESLA Test Facility. For the industrialization of the power coupler three contracts where placed at the Industry. The follow up of these contracts is under the supervision of LAL. We will report about the approach of the contract and some results.
	Slides(PDF)