• Plasma flows and configuration

    Plasma rotation has become one of the key ingredients of fusion plasma performance, specially after the discovery of a reduction of turbulence and transport through a sheared E × B rotation. With regard to stability, large toroidal rotation can stabilize resistive wall modes and neoclassical tearing modes. For these reasons, the physics of toroidal momentum …

  • Impurity accumulation

    In magnetic confinement fusion, atomic species other than the fusion reactants (e.g. deuterium and tritium for the fuel mix envisaged for the first demonstration reactors) are termed ‘impurities’. The presence of even small concentration of impurities (especially those of high charge number Z ) in the confinement volume has deleterious consequences on plasma performance, due …

  • Particle fuelling and density control

    Core plasma fuelling is a critical issue for developing steady-state scenarios in fusion reactors. Gas puffing, the standard tool for creating and sustaining plasmas, will be inefficient in large-size devices, since the particle source is located at the edge. Moreover, the particle source due to recycling is expected to be small, since the plasma-wall interaction …

  • Energy confinement

    The basic physics idea behind magnetic confinement fusion is relatively simple: it consists on extracting energy from well-known atomic reactions that take place once the appropriate conditions have been created. These conditions can be summarized by the so-called Lawson Criterion: the triple product nτE (where n is the plasma density, T the plasma temperature and …