Testing and Implementation Progress on the Advanced Photon Source (APS) Linear Accelerator (Linac) High-Power S-band Switching System

摘要

An S-band linear accelerator is the source of particles and the front end ofthe Advanced Photon Source injector. In addition, it supports a low-energyundulator test line (LEUTL) and drives a free-electron laser (FEL). Awaveguide-switching and distribution system is now under construction. Thesystem configuration was revised to be consistent with the recent change toelectron-only operation. There are now six modulator-klystron subsystems, twoof which are being configured to act as hot spares for two S-band transmitterseach, so that no single failure will prevent injector operation. The twosubsystems are also used to support additional LEUTL capabilities and off-linetesting. Design considerations for the waveguide-switching subsystem, topologyselection, control and protection provisions, high-power test results, andcurrent status are described