Abstract
This chapter reports and discusses the increase of output current of thermionic energy converter due to the Xenon short arc lamp illumination. The effect of the illumination on the output current of the thermionic energy converter are examined as a function of the emitter temperature and cesium gas temperature. In general, the thermionic energy converter is operated by the unignited mode at the lower cesium gas temperature. The characteristics operated by the ignited mode are observed at the higher emitter and cesium gas temperature. The output voltage needed to induce the ignited mode operation depends on the illumination, in addition to the emitter and cesium gas temperatures. It should be noted that the ignited mode appears even in the positive output voltage at the emitter temperature of 1280 K and cesium gas temperature of 443 K. It is found that the output current becomes sensitive to the external magnetic field under this condition.
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