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The Arata Demonstration: A Review Summary

On May 22, a special announcement/presentation was held at Osaka University by Prof. Yoshiaki Arata in the presence of colleagues, guests, and press. The announcement of new results took place in Arata Hall, a campus building named for Prof. Arata, and a demonstration took place in the Arata-Zhang laboratory room in a nearby research building. A research paper describing recent results was made available in Japanese and English versions. The English version has just been published in the J. High Temp. Soc. Jpn. 1 The big event seems to have been disclosure of a new deuteriumfueled cold fusion reactor using no electrical power. The reactor contains pressurized D 2 gas and releases a steady flow of heat to its surroundings. It is hard to explain the observed heat flow without accepting the reality of cold fusion. This review is based on the new results as interpreted in terms of previous papers by the Arata and Zhang (A-Z) collaboration. To understand the significance of the new A-Z work it is helpful to review a few aspects of Arata’s professional career, and of the A-Z collaboration. I’m writing from memory and not as a historian. Arata was a young scientist starting his career after World War II. His interest was in thermonuclear fusion and in the engineering of very high temperature plasma devices to release nuclear energy. At the time there was no deuterium gas available in Japan, but there was heavy water D 2 O. He built his own electrochemical deuterium production cell in which D 2 O was electrolyzed onto a Pd separator-wall cathode producing pure deuterium on its gas-collecting side. He used the very high purity deuterium gas product in high current density plasma devices in which condenser bank discharges created conditions approaching plasma fusion temperatures. One experiment used a palladium bottle with walls packed with fine Pd crystals, seeking high temperature “solid fusion” conditions. For a period of time his arc discharges held a world record. Later he developed a program for electron