The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - CONF AU - Hershcovitch, A. AU - Blaskiewicz, M. AU - Brennan, J.M. AU - Brodowski, J. AU - Custer, A.X. AU - Dingus, A.A. AU - Erickson, M.Y. AU - Fischer, W. AU - Jamshidi, N.Z. AU - Poole, H.J. AU - Than, R. AU - Tuozzolo, J.E. ED - Petit-Jean-Genaz, Christine ED - Arduini, Gianluigi ED - Michel, Peter ED - Schaa, Volker RW TI - Apparatus and Technique for Measuring Low RF Resistivity of Tube Coatings at Cryogenic Temperatures J2 - Proc. of IPAC2014, Dresden, Germany, June 15-20, 2014 C1 - Dresden, Germany T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - An in-situ technique for coating stainless steel vacuum tubes with Cu was developed to mitigate the problems of wall resistivity that leads to unacceptable ohmic heating of superconducting magnets cold bore and electron cloud generation in RHIC that can limit future machine luminosity enhancement. Room temperature RF resistivity of 10 μm Cu coated stainless steel RHIC beam tube has conductivity close to copper tubing. Before coating the RHIC beam pipe with copper, it is imperative to test the Cu coating’s conductivity at cryogenic. A folded quarter wave resonator structure has been designed and built for insertion in a cryogenic system to measure RF resistivity of copper coated RHIC tubing at liquid helium temperatures. The design is based on making the resonator structure out of a superconducting material such that the copper coating is the most lossy material. RHIC tubing samples prepared with different magnetron sputtering deposition modes are to be optimized by iterative processes. Additionally, this device can also be used for the development of better, cheaper SRF cavities and electron guns. The apparatus and its design details will be presented. PB - JACoW CP - Geneva, Switzerland SP - 4046 EP - 4048 KW - vacuum KW - cryogenics KW - electron KW - cavity KW - network DA - 2014/07 PY - 2014 SN - 978-3-95450-132-8 DO - 10.18429/JACoW-IPAC2014-THPRI114 UR - http://jacow.org/ipac2014/papers/thpri114.pdf ER -