Plasma Heating with Multi-MeV Neutral Atom Beams

Negative Ion Based Heating and Diagnostic Neutral Beams for ITER

To meet the requirements of the four operating and one start-up scenarios foreseen in the International Tokamak Experimental Reactor (ITER) a flexible heating mix will be required, which has to include a reliable contribution from neutral beams. The current baseline of ITER foresees 2 Heating Neutral Beam (HNB) systems based on negative ion technology, each operating at 1 MeV 40 A D ions, and e...

Multi-mev Ion Beams from Terawatt Laser Thin-foil Interactions

We have conducted investigations of a collimated beam of fast protons, produced by a 10TW laser with frequencies of either ω0 (corresponding to 1.053 micron light) or 2ω0 (corresponding to 532 nm light) focused to an intensity of more the 3x10 W/cm onto the surface of a thin-film target. Energies as high as 10 MeV and total number of 10, confined in a cone angle of 40°±10° have been observed. T...

Neutral Atom Modeling of the Tftr First Wall, Pump Ducts, and Neutral Beams

The DEGAS neutral transport code is used in two separate cases to simulate the neutral beam box and vessel of the Tokamak Fusion Test Reactor (TFTR). For the neutral beam box simulation, known input parameters include the ion density at the source exit and the proportion of input gas that is converted to the high-energy atomic beam. The T° current to the torus is (1.61" ± 0.03) X 10 s~, with th...

Neutral beam heating of a RFP plasma in MST

H α with Heating by Particle Beams

Using 1D NLTE radiative hydrodynamics we model the influence of the particle beams on the Hα line profile treating the beam propagation and the atmosphere evolution self-consistently. We focus on the influence of the non-thermal collisional rates and the return current. Based on our results, we propose a diagnostic method for determination of the particle beam presence in the formation regions ...