Development of a multiple stage depressed collector system for 1 MW CW gyrotrons

Summary form only given. Calabazas Creek Research, Inc. is developing a multiple stage depressed collector system that includes the depressed collector, power supplies, and computer control system for 1 MW CW gyrotrons. The goal of the program, funded by the Department of Energy´s Small Business Innovation Research program, is to develop a single system that will be applicable to all Gaussian mode gyrotrons operating between 100 GHz and 170 GHz. The power supply system will meet the requirements of all gyrotron components, including the collector, cathode, body, and modulating anode. The integration of all power supply components allows computer optimization of tube performance under all operating conditions and greatly simplifies control of the device. It is also anticipated that the system approach to the collector and power supplies will result in a reduced acquisition and operational cost to the user. The power supply system is being designed by Diversified Technologies, Inc., which developed high power, solid state power supplies under a previous DOE grant. The use of solid state power supplies and switches provides a level of control and protection not readily available in traditional power supply systems. Operation of the gyrotron will be optimized for efficiency at all power levels using advanced computer algorithms to determine the proper electrode potentials and collector coil currents. Information on the collector design, power supply system, and computer optimization performance will be presented.