Phase and amplitude tuning procedures for the Fermilab linac

Procedures for both coarse and fine tuning of phase and amplitude of the Fermilab linear accelerator cavities are described. Coarse tuning is accomplished by measuring the change in energy as the phase of an individual accelerator cavity is adjusted. Proper field level occurs when the peak energy change equals the design value. Phase is initially set to calculated values relative to the phase at which the energy peak is measured. Fine tuning is accomplished using the delta-t procedure developed at the Los Alamos National Laboratory. Preliminary tests of the delta-t procedure on the existing 200 MeV linac show qualitative trends in agreement with theory. The procedures described in this report have been proposed for use on the upgraded linac under construction at Fermilab. 6 refs., 9 figs., 1 tab