ISSN:
1572-9591
Keywords:
Ignition
;
tokamak reactors
;
INTOR
;
field ripple
Source:
Springer Online Journal Archives 1860-2000
Topics:
Energy, Environment Protection, Nuclear Power Engineering
Notes:
Abstract The requirements for ignition in a tokamak reactor with INTOR-like parameters were studied using a one-dimensional transport code. With “empirical” electron energy diffusivityχ e , ignition was obtained with 60–75 MW of neutral beam injection at a volume average pressure ratio 〈β〉=4–5% under a variety of conditions. Changingχ e gave ignition at the same 〈β〉 if the plasma minor radius varied asa ∞ χ e 1/2 . The maximum impurity concentration which allows ignition was found to be comparable to that for the much simpler case of a homogeneous plasma with radiative losses only. In long pulse simulations with efficient helium pumping, the maximum toroidal field ripple which allowed ignition was 2.0% (peak-to-peak) at the plasma edge. Ignition was maintained with over 99% recycling of helium ash using 5% less than maximum ripple.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01050360
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