| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method of forming a region where an ion temperature is raised efficiently to a nuclear fusion ignition temperature by a method other than a fast ignition method on imploded high-density plasma of a condition which is easier to attain, 100 g/cm<SP>3</SP>in density and about 1 million °C in temperature, in an inertial-confinement nuclear fusion device. Ž<P>SOLUTION: An ignition method in nuclear fusion is constituted and characterized in that it includes a step of forming high-density plasma by imploding a target containing hydrogen isotopes as fuel with a laser beam, an electron beam, an ion beam, X rays or plasma and a step of irradiating the outer periphery of the imploded high-density plasma with the laser beam to heat electrons there, setting the average temperature of the heated electrons up to around 10 keV and using fast electron-ion energy relaxation in the high-density plasma to set the average temperature of ions at the nuclear fusion ignition temperature of 5 keV or higher. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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