State-of-the-art of high power gyro-devices and free electron masers. Update 2004

Abstract. One approach to beamed energy propulsion uses a solid heat exchanger to absorb energy from a distant source and transfer it to a working fluid. Systems of this type can be designed using either microwave or laser sources. In general, microwave sources have been expected to be less expensive than lasers for a given power, but to be more limited in range and/or energy density. With the development of high power millimeter-wave sources and low-cost diode laser arrays, both assumptions are open to question. In this paper, we compare current and projected microwave and laser source technologies for a 100-kilogram-class ground-to-orbit launch system and identify key issues affecting the system-level trade between the two approaches.

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Design studies of an 84 GHz, 500 kW, CW gyrotron

Kartikeyan

Singh²,

Borie³

et al.

2005 Joint 30th International Conference on Infrared and Millimeter Waves and 13th International Conference on Terahertz Electr

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The feasibility of an 84 GHz, 500 kW, CW gyrotron for ECRH on an experimental Tokamak will be presented in the design study of this paper. Mode competition and mode selection procedures are carefully investigated by considering various candidate modes and the TE10,4 mode is chosen as the operating mode. A suitable cold cavity is considered with quality factor around 1000. Self-consistent calculations are carried out and power and efficiencies are computed for a typical set of beam parameters. The results show that an output power of well over 500 kW, CW and efficiency around 40% can be reached without a depressed collector.

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State-of-the-art of high power gyro-devices and free electron masers. Update 2004

Cited by 5 publications

References 384 publications

Towards a 1MW, 170GHz gyrotron design for fusion application

Towards a 1MW, 170GHz gyrotron design for fusion application

A Comparison of Laser and Microwave Approaches to CW Beamed Energy Launch

Design studies of an 84 GHz, 500 kW, CW gyrotron

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