There are other entities in the race, including Germany's Wendelstein 7-X stellarator
and the now-inactive but still operational Alcator C-Mod tokamak at MIT.
Meanwhile, at the Max Planck Institute of Plasma Physics, the Wendelstein 7-X stellarator
heated up plasma to almost 40 million degrees Celsius!
In this regard, the design of the stellarator
required the use of superconducting helicoidal coils of complex shape (see Fig.
Cole, "Results of Compact Stellarator
engineering trade studies," in Proceedings of the 2009 23rd IEEE/NPSS Symposium on Fusion Engineering--SOFE, pp.
Currently, the approach toward testing the viability of nuclear fusion involves using either a tokamak or a stellarator
. A tokamak - (http://www.ibtimes.com/nuclear-fusion-world-record-mits-alcator-c-mod-tokamak-breaks-its-own-plasma-pressure-2432110) one of which is currently being tested by researchers at the Massachusetts Institute of Technology's Plasma Science and Fusion Center - is a doughnut-shaped device that can contain high-energy plasma using two-dimensional magnetic fields created by a ring of magnets.
The Wendelstein 7-X stellarator
, another advanced reactor, has just begun what's expected to be a yearlong experimental campaign in Greifswald, Germany.
The team in Greifswald is focused on a rival technology invented by American physicist Lyman Spitzer in 1950, called a stellarator
The Wendelstein is the first "stellarator
"--Spitzer's name for his invention--to be built since the 1970s.
A billion dollar class stellarator/heliotron device (LHD) has been in operation in Japan for many years and another large stellarator
(W7-X) is under construction in Germany.
What is Bubble Wrap doing covering protuberances in the Stellarator
Wendelstein 7-X Detail, Max Planck IPP, Greifswald, Germany, 2009?