The SLAC next linear collider source program

Summary form only given, as follows. The SLAC approach to a future e/sup +/-e/sup -/ 1-TeV linear collider, which will probably be an internationally sponsored project at the turn of the century, is a conventional 14-kilometer accelerator operating at 11.4 GHz. SLAC is on the 6th year of a program to develop 50-100 MW klystron sources for the "Next linear collider" or "NLC". The paper will trace the development of these tubes and present experimental results for solenoid-focused klystrons with output circuits of both the standing-wave and travelling-wave variety. In addition, the design of a periodically-focused permanent magnet klystron will be discussed and a tape will be shown with time-sequenced simulations of the interaction process for such a tube.