U.S. Particle Accelerator School
MIT
Accelerator Production of Tritium
Thomas Wangler, James Billen, George Lawrence and Paul Lisowski, Los Alamos National Laboratory
This course presents the basic principles for the design of a new, large-scale, proton linear accelerator project, the Accelerator Production of Tritium (APT), which is being carried out as a joint effort by the national Laboratories and US industry. The 1.7-GeV linac will be the worlds highest average-power accelerator, delivering a 170-MW proton beam to a target/blanket system in which tritium will be produced by spallation neutrons. The major part of the course is a study of the accelerator design, including the principles of operation of the linac accelerating structures, high-current-linac beam dynamics, including beam-halo effects produced by space-charge forces, and other technology issues. The principles of the basic computer codes used for the accelerator design will be presented. Two accelerator design approaches have been developed, one for a normal-conducting linac that uses conventional copper structures, and one which uses superconducting cavities. Both will be addressed, and in particular the design approach for the proton superconducting-linac sections. The course will also cover a project overview and the basic target physics. Prerequisites: electromagnetism and classical mechanics.