Calculation of the gain factor Q in twocomponent plasma systems
Abstract
Calculations of Q including the effects of velocity diffusion, finite ion temperature, electric fields and charge exchange are presented. It is found that if all chargeexchange fast ions are lost then Q is severely reduced for a neutraltoelectron ratio of 0.000001. These losses are reduced by reionization of the chargeexchanged fast ions. Calculations for the case of a twocomponent Tokamak show that the effective chargeexchange rate is typically reduced by 2.54 times owing to reionization. With allowance for this, it is found that, in a stationary system, the plasma loss rate must be greater than 10 to the 12 per cu cm to achieve a Q greater than unity.
 Publication:

Nuclear Fusion
 Pub Date:
 October 1975
 Bibcode:
 1975NucFu..15..755C
 Keywords:

 Charge Exchange;
 Controlled Fusion;
 PlasmaParticle Interactions;
 Q Factors;
 Tokamak Devices;
 Deuterons;
 Electric Fields;
 FokkerPlanck Equation;
 Hydrogen Plasma;
 Ion Temperature;
 Plasma Composition;
 Plasma Diffusion;
 Tritium;
 Plasma Physics