In May 2004, AMAC International and Communication Power Industries (CPI) in Beverly, MA designed and constructed two RF input coupler prototypes for the international collaboration accelerator project, TESLA. The prototypes are currently at DESY, Germany, which is the leading organization in TESLA project, for RF tests. AMAC's coupler design for TESLA aimed at a cost effective, reliable coupler, and more suited for mass production, than the presently used TESLA coupler. The present couplers for TESLA use cylindrical ceramic windows design, but AMAC proposed a design with two identical disk shaped windows for a more compact design.

　　In 2002, AMAC’s team of engineers and scientists developed novel window-coupler and high RF power window-coupler technologies. Two improvements over conventional window-coupler designs are the development of the compression ring and the internal cooling jacket on the ceramic window. Both were proven to be feasible in AMAC’s Phase I SBIR project. Our success in Phase I lead to a DOE Phase II award. The compression ring with the internal cooling channel keeps the window in compression so that tensile stresses are not able to develop during operation. The AMAC design has an improved thermal path between the perimeter of the ceramic and coolant. AMAC’s coupler design has the lowest electron multi-pacting activities compared to any other existing coupler designs; in which, we used a specially developed RF geometry design that is considered cost effective, easier to be cleaned, kept in a very good vacuum, and easier to fabricate.

　　AMAC and CPI have partnered to build three prototypes for SNS High RF power Input coupler assembly for the Oak Ridge National Lab. SNS is an advanced national project involving several hundreds of millions of dollars. To date, we have completed three high RF power Input Coupler prototypes, which were cryogenic tested to meet SNS requirements at Jefferson Laboratory.