Explanation

A device that achieves nuclear fusion reactions under controlled conditions and continuously releases nuclear energy. The fusion reaction in which hydrogen nuclei react to form heavier nuclei and release nuclear force interaction energy is the energy source for stars and the main energy source for hydrogen bombs. Nuclear fusion can only be carried out at a very high temperature. In order to make the energy released by fusion reaction greater than the energy input during compensation heating, the temperature, density and constraint time of the reaction nucleus must meet certain conditions (the so-called Lawson criterion), so as to build a useful fusion reactor, such as deuterium tritium reaction. Among the three reactions mentioned above, the deuterium tritium reaction has the largest cross section, which is the basis of the first generation fusion reactor. There are two ways to realize Lawson criterion: magnetic constraint and inertial constraint. No matter which way, there are still a series of scientific and technological problems to be solved, and the materials problem is one of the keys.

Classification