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Fusion Science and Technology
Latest News
Taking shape: Fusion energy ecosystems built with public-private partnerships
It’s possible to describe fusion in simple terms: heat and squeeze small atoms to get abundant clean energy. But there’s nothing simple about getting fusion ready for the grid.
Private developers, national lab and university researchers, suppliers, and end users working toward that goal are developing a range of complex technologies to reach fusion temperatures and pressures, confounded by science and technology gaps linked to plasma behavior; materials, diagnostics, and electronics for extreme environments; fuel cycle sustainability; and economics.
A. V. Lvovskiy, A. L. Solomakhin
Fusion Science and Technology | Volume 59 | Number 1 | January 2011 | Pages 298-300
doi.org/10.13182/FST11-A11641
Articles are hosted by Taylor and Francis Online.
Plasma consists of two components in the Gas Dynamic Trap facility: a relatively cold and dense collisional plasma and a population of fast anisotropic ions which oscillate between mirror points. Peaks of fast ion density are made closely to the mirror points. It formes an ambipolar potential difference between these points and the center of the facility. The ambipolar potential restricts a plasma flow through the mirror region, so it influences on the plasma confinement. The ambipolar potential value can be found from the line plasma density in the central facility region. The dispersion interferometer, which is based on a CO2-laser with wavelength = 9.57 m, has been made for this purpose. The minimal line plasma density measurable with the dispersion interferometer is (nel) ~ 1013 cm-2, the time resolution is 100 s. The fast ion line density is 4 times higher than the warm ion line density in the mirror region. The ambipolar potential value is e [approximately equal] 0.7 Te in electron temperature units. Also the flute instability restriction opportunity with gradient of local electric field has been observed. The limiter voltage satisfying the condition U ~ Te is boundary for stabilization of plasma behavior.