Stellarators Stellarators - Stellarator, Princeton Plasma Physics Laboratory, Columbia Nstellarator, Princeton Plasma Physics Laboratory, Columbia Non-Neutral Torus, Lyman Spitzer, Wendelstein 7-X On-Neutral Torus, Lyman Spitzer, Wendelstein 7-X (Paperback)

Chapters: Stellarator, Princeton Plasma Physics Laboratory, Columbia Non-Neutral Torus, Lyman Spitzer, Wendelstein 7-X, Helically Symmetric Experiment, H-1nf, National Compact Stellarator Experiment, Large Helical Device. Source: Wikipedia. Pages: 32. Not illustrated. Free updates online. Purchase includes a free trial membership in the publisher's book club where you can select from more than a million books without charge. Excerpt: A stellarator is a device used to confine a hot plasma with magnetic fields in order to sustain a controlled nuclear fusion reaction. The magnetic field necessary to confine the plasma is generated completely by external coils. It was invented by Lyman Spitzer and the first devices were built at the Princeton Plasma Physics Laboratory in 1951. The name was given to this early fusion concept because of the possibility of harnessing the power source of the sun (which is a stellar object). Some important stellarator experiments are Wendelstein, in Germany, and the Large Helical Device, in Japan. Princeton Plasma Physics Laboratory started building a new stellarator, NCSX, but as of 2008, work was abandoned due to high costs. The stellarator solves issues faced by tokamak fusion reactors where the windings of an electromagnet's wiring around a torus are less dense on the outside of the loop than on the inside, which makes it difficult for magnetic tori to contain plasma. The stellarator addresses this issue by using a toroid bent into a figure-eight shape. In a standard torus plasma particles (ions) on the inner portion of the tube are subjected to a greater magnetic force than those at the outside. Only particles near the middle receive the optimum amount. Since magnetic forces are generally at right angles to motion, non-centered plasma moving around the toroid would be forced up or down until it hit the edges of the tube. In a stellerator, when a particle orbits the tube, it spends half the time o...More: http: //booksllc.net/?id=2959