Tokamak ignition

Table 2a. Plasma parameters and power balance for a beam-driven D-T tokamak and an ignited tokamak reactor...

The plasma parameters and power balance for a beam driven D-T Tokamak and an ignited Tokamak reactor are listed in Table 2 a for illustrative purposes. The ranges of photon and particles fluxes to be expected on the first wall are listed in Table 2b. 

In the Tokamak fusion reactor depicted in Fig. 21.9, electric current to the poloidal coils on the primary magnetic transformer generates the axial current in the secondary plasma composed of deuterium and tritium ions. These ions are heated to ignition temperature and then the reaction becomes self-sustaining. The toroidal field coil suspends the plasma away from the metal conducting walls. Contact with the wall would both cool the plasma below ignition temperature and contaminate the plasma with heavy ions. The relevant reactions are given below. 

Furth, Harold P. "Reaching Ignition in the Tokamak", Physics Today, Vol. 38, No. 3, March 1985, Page 52... 

Resume IGNITION IN TOKAMAK WILL PROBABLY BE POSSIBLE BY NEUTRAL INJECTION HEATING BUT NI IS PROBABLY NO WAY FOR REACTOR HEATING. RADIO FREQUENCY RF) HEATING IS TECHNICALLY MORE PROMISING. A SATISFACTORY SOLUTION FOR COMMERCIAL TOKAMAK REACTOR HEATING CANNOT YET BE SAFELY PREDICTED. 

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