BROOKH IEN NATI 0 NA L LAB 0 RAT0 RY BNL-73429-2005-CP Design Considerations for the Mechanical Tuner of the RHIC Electron Cooler SRF Cavity J. Rank, I. Ben-Zvi, H. Hahn, G. McIntyre Presented at the Particle Accelerator Conference (PAC '05) Knoxville, Tennessee March 19-23,2005 Collider-Accelerator Department Brookhaven National Laboratory P.O. Box 5000 Upton, NY 11 973-5000 wvvw.bnl.gov Managed by Brookhaven Science Associates, LLC for the United States Department of Energy under Contract No. DE-AC02-98CH10886 This is a preprint of a paper intended for publication in a journal or proceedings. Since changes may be made before publication, this preprint is made available with the understanding that it will not be cited or reproduced without the permission of the author.