Statement of the problem or situation that is being addressed. This proposed research project responds directly to the need of a high-efficiency continuous-wave microwave source at a frequency of 1.497 GHz delivering at least 8kW of power. This research will provide a klystron with an overall efficiency of 82% and a high degree of backwards compatibility to allow its use as a replacement for klystrons currently used today, which are only 35% efficient. General statement of how this problem is being addressed. FM Technologies, Inc. (FMT) is proposing a novel high-power (8 kW) high-efficiency (82%) continuous- wave (CW) L-band (1.497 GHz) klystron system, which will be named the L-band Micro-Pulse Klystron (L- MPA). The L-MPK is an extension of FMTs patented and proprietary Micro-Pulse Gun (MPG) technology suite that will allow for improved performance and dramatic energy savings. What is to be done in Phase I? In Phase I, design and analysis will be the focus. An continuous-wave (CW) micro-pulse electron gun will be developed, in conjunction with appropriate insulation and post acceleration. A complete system design will be performed for the L-band Micro-Pulse Klystron. Fabrication drawings will be generated for a prototype to be built in Phase II. Commercial Applications and Other Benefits If successful, this L-band Micro-Pulse Klystron will provide a high-power, high-efficiency RF power source that can be scaled to other microwave frequencies and used in a continuous-wave or pulsed mode, making it suitable for many applications. Of particular interest are high-power RF sources for fusion research, linear colliders, free electron lasers, and medical and industrial RF linacs. Key Words: RF source, klystron, fusion Summary for Members of Congress: This program will develop a radio-frequency power source suitable for many applications and of particular importance for large scale accelerators and RF linacs. It will also advance the state of the art of klystron technology, making them more compact, more energy efficient and longer lasting.
