Ionization and Recombination Rate Coefficients of Highly Ionized Molybdenum Ions from Spectroscopy of Tokamak Plasmas

Abstract

Ionization and recombination rate coefficients have been estimated using the effect of saw-tooth electron-temperature relaxations in a tokamak plasma on the emission of impurity ions. The ionization rate coefficient of highly ionized (of the order of 30) molybdenum has been found to be between 1 and 1.5 times Lotz's semiempirical coefficient. For the first time, we have also estimated the recombination (mainly dielectronic) rate coefficient for the same ions, and have found it to be between 0.5 and 1 times the value given by Burgess's formula.