Study of radiatively sustained cesium plasmas for solar energy conversion

Computer Science

Scientific paper

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Cesium Plasma, Solar Energy Conversion, Thermionic Converters, Thermoelectric Generators, Computer Programs, Faraday Effect, High Temperature Plasmas, Laser Pumping, Magnetohydrodynamics, Maxwell-Boltzmann Density Function, Rankine Cycle, Solar Radiation, Spacecraft Power Supplies, Thermal Absorption, Working Fluids

Scientific paper

The results of a study aimed at developing a high temperature solar electric converter are reported. The converter concept is based on the use of an alkali plasma to serve as both an efficient high temperature collector of solar radiation as well as the working fluid for a high temperature working cycle. The working cycle is a simple magnetohydrodynamic (MHD) Rankine cycle employing a solid electrode Faraday MHD channel. Research milestones include the construction of a theoretical model for coupling sunlight in a cesium plasma and the experimental demonstration of cesium plasma heating with a solar simulator in excellent agreement with the theory. Analysis of a solar MHD working cycle in which excimer laser power rather than electric power is extracted is also presented. The analysis predicts a positive gain coefficient on the cesium-xenon excimer laser transition.

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