Investigating the thermal stability of highly radiative discharges on JET with a new tomographic method

摘要: The next generation of Tokamak devices is expected to work at very high radiated fractions, well above 90%, preserve the integrity plasma facing components in general and divertor particular. In addition maintaining confinement, these configurations will also have guarantee a low disruptivity. An accurate determination emitted radiation therefore become increasingly important, not only for global power balances but specific regions cross section (for example properly control detachment). this perspective, new tomographic inversion method, based on maximum likelihood (ML) approach, capable providing routinely confidence intervals estimates power, has been applied investigation radiative discharges JET with ITER like wall (ILW). emission increased injection extrinsic impurities. Taking into account all major sources uncertainties, systematic analysis shown that it possible develop stable fraction higher than 70% input power. At fractions always disrupt. Therefore significant remains be done extend operation reactor relevant regime sufficient preparation DEMO.