The APT SCRF cryomodule: present status and potential future plans

A prototype cryomodule for the /spl beta/=0.64 superconducting rf linac is being developed at Los Alamos National Laboratory (LANL) for the Accelerator Production of Tritium (APT) program. This design is aimed toward proof-of-principle testing and forms the starting point for the large-scale APT plant. Several alternate design options are also being explored to improve manufacturability and maintainability, reduce cost, increase reliability, and increase availability of qualified commercial suppliers. Progress to date on the prototype cryomodule is summarized in this paper, as are some interesting possible design improvements.