Francesco Paolo Orsitto
CREATE Consortium, Naples (Italy)

"Tokamak reactor scenarios and implication on reactor design, diagnostics and controls"

Pulsed and steady state tokamak reactor models studied so far are based on different plasma scenarios and engineering constraints[1,2]. The talk is devoted to a brief review of the present status of tokamak plasma scenarios (H-mode, Hybrid or Improved H-mode, high beta-high bootstrap fraction). The uncertainties on the characterization of the various scenarios having possibly major impact on the fusion reactor design parameters are then introduced. A detailed evaluation of the impact of the confinement scaling laws[3] on the dimensions of the device, input power, divertor power load is presented, using the simplified approach introduced by H Zohm[4]. The reactor parameters are obtained using the confinement scaling with the normalized Larmor radius and beta dependence like rho*-0.7 beta-0.9 (IPBy2 scaling law) and JET-like with rho*-3 beta0. The Impact of the scenario on the set of diagnostics systems needed to control the fusion reactor is then outlined. Technical details of the diagnostics systems related to the machine protection and burn control are presented and discussed.

Host: Francesco Volpe