Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..apre16007b&link_type=abstract
American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As
Astronomy and Astrophysics
Astrophysics
Scientific paper
Ignitor is the first fusion experiment proposed and designed to reach ignition in a magnetically confined plasma, which is the condition where the heating power of the fusion products compensates for all plasma losses. It takes a relatively conservative approach to the near term study of the physics of igniting plasmas, using an optimized combination of compact dimensions (major radius R_0=1.32 m, minor radius a = 0.47 m, elongation κ=1.8) and high magnetic field (B_T=13 T) to support high plasma particle densities (n0 <= 10^21 m-3) and high plasma currents (I_p=11 MA). Demonstration of ignition, analysis of burning plasma physics processes, and establishment of heating and control methods on time scales sufficiently long relative to the plasma characteristic times are the main goals of the Ignitor experiment. A distinct advantage of the Ignitor design is represented by the low value of the parameter β-poloidal, which provides a margin against the deleterious effects of internal modes, while maintaining the values of n_0TτE necessary for ignition. In the reference operating scenario, ignition can be reached by ohmic heating alone. However, given the available auxiliary RF heating system, other regimes can be accessed, such as the so-called H-mode in a double X-point configuration. Work supported in part by ENEA of Italy and by the US DOE.
Bombarda F.
Coppi Bruno
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