Jefferson Lab, Newport News, Virginia
October 30 - November 1, 2002

First Announcement

Background

Superconducting high-power radio-frequency technology has been selected by a number of accelerators for use in high-energy physics (CERN, KEK, DESY, Cornell), in nuclear physics (CEBAF), in FELs (Jefferson Lab) and in neutron production (SNS). More such accelerators are being designed or considered with even higher cavity field gradients and higher beam powers.

One key component in the application of the superconducting RF technology is the fundamental mode coupler, which must fulfill the following tasks:

• Carry RF power ranging from kilowatts to megawatts under different beam loading conditions, with standing waves or traveling waves, in continuous wave or in pulsed modes
• Isolate the cavity/beamline vacuum from atmospheric pressure
• Bridge the thermal gradient from room temperature to the cold (2-4.2 K) environment

Successful designs of power couplers have reached hundreds of kilowatts in operation and well over the megawatt level in testing, and many coupler features are now well understood and controlled. Design efforts have generally focused on increasing the power that can be transmitted by couplers. However, it is also important that attention be focused on improving the basic technologies involved in the construction of couplers and on decreasing costs. Presently the cost of couplers is comparable to the cost of the cavities they power, and simplifying designs and decreasing costs would not only benefit present or planned projects, but would also increase applicability of this technology to a broader base.

Purpose

This workshop is intended to bring together coupler designers, manufacturers and users and allow them to interact with members of other scientific and industrial communities to generate new ideas and methods for lowering fabrication costs and simplifying coupler designs.

The workshop will include presentations of the significant characteristics of couplers now in operation or being designed (including electrical design, selection of materials and coatings, window design, fabrication methods, cleaning and handling, processing of components and performance) and presentations of scientists and engineers from other communities with new solutions and ideas.

The workshop aims to provide a forum for better understanding the needs of the accelerator community and what industry and academia can offer to improve performance and lower costs. In addition, the workshop will attempt to identify the most crucial areas of research for achieving these goals.

Workshop Co-Chairs
M. Champion (SNS) and I. E. Campisi (JLab)

For further information: HPC2002@jlab.org

content by bizot@jlab.org
maintained by webmaster@jlab.org
updated May 22, 2002