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Clemens, W.

Paper Title Page
WEPMS063 Preliminary Results from Prototype Niobium Cavities for the JLab Ampere-Class FEL 2487
  • P. Kneisel, R. Bundy, G. Ciovati, W. Clemens, D. Forehand, B. Golden, S. Manning, R. Manus, R. B. Overton, R. A. Rimmer, G. Slack, L. Turlington, H. Wang
    Jefferson Lab, Newport News, Virginia
  • F. Marhauser
    JLAB, Newport News, Virginia
  Funding: This manuscript has been authored by Jefferson Science Associates, LLC under U. S. DOE Contract No. DE-AC05-06OR23177, and by the office of Naval Research under contract to the Department of Energy.

In a previous paper the cavity* design for an Ampere-class cryomodule was introduced. We have since fabricated a 1500 MHz version of a single cell cavity with waveguide couplers for HOM and fundamental power, attached to one end of the cavity, a 5-cell cavity made from large grain niobium without couplers and a complete 5-cell cavity from polycrystalline niobium featuring waveguide couplers on both ends. A 750 MHz single cell cavity without endgroups has also been manufactured to get some information about obtainable Q-values, gradients and multipacting behavior at lower frequency. This contribution reports on the various tests of these cavities.

* R. A.Rimmer et al.; EPAC 2006, paper MOPCH182