Abstract
Electron emission has been observed when tungsten and molybdenum targets are subjected to focussed CO2 laser radiation. The characteristics of thermionic emission for a variety of excitation conditions are reported. The electron temperature is found to be [Formula: see text] for an incident power of 40 W cw. Direct energy conversion processes are discussed. Short circuit currents of 2–7 μA and open circuit voltages of 0.1–0.4 V have been observed.
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