Arcs are thermal plasmas: the temperatures of eletrons, ions and neutrals are roughly equal. In many cases, arcs are self-constricted. Two cases will be discussed: magnetically pinched arcs in Xe or Sn vapour (applied in EUV radiation sourcces) and AC arcs in metal halide vapours (used for lamps). In the first case, the pinching is essential for driving up the multiple ionisation to the required levels. For these arcs, we will look into sub-nanosecond phenomena. In the second case, the pinching is influenced by gravity. We will present measurements and simulations for gravity levels between 0 and 10 g.
|Title of host publication||Abstract presented at the 18th Topical Conference on Radio Frequency Power in Plasmas (RF 2009), 24 - 26 June 2009, Gent, Belgium|
|Publication status||Published - 2009|