Physicists closer to creating artificial stars

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The scientists of Princeton plasma physics laboratory under U.S. Department of energy Photo: Elle Starkman / PPPL Office of Communications

The scientists of Princeton plasma physics laboratory under Department of energy has found a method of stabilization of a superhot plasma inside the chambers for thermo-nuclear fusion, similar to what occurs in the depths of the stars. About it reported in a press release on Phys.org.

One of the main challenges to maintaining the reactions of thermonuclear fusion inside a tokamak is the instability of the plasma. Because of the so-called discontinuous fashion (eng. tearing modes), the formation of magnetic Islands that grow, stop the synthesis reaction and can even damage the machine.

In the 1980’s, physicists discovered that use radio waves to control the flow of plasma prevents the development of explosive modes and reduces the risk of failure. In the new work, scientists have determined that small perturbations in the temperature of the plasma can also contribute to the stabilization.

Thus, temperature perturbations in the plasma increases the strength of flowing current and the amount of radio frequency energy absorbed by the islets. The disturbances and their impact on embodied energy of complex non-linear way independent from each other. As the electric current needed to stabilize the plasma, are sensitive to changes in temperature, it becomes possible to achieve conditions, when all three factors contribute to the concentration of RF energy inside the islets, preventing their further growth.

Video, photo All from Russia.

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