1999 I 3

From QED

One can use charge-exchange recombination spectroscopy (CHERS) in order to determine the ion temperature of a hot magnetically confined plasma. This requires the injection of a neutral beam into the plasma. The neutral beam atoms can exchange their electron with the hot plasma ions. When the electron recombines with the plasma ion, it releases a photon at the energy of the ionization potential. The doppler broadening of these photons can be measured, giving the ion temperature.

This could be complicated by the emission of recombination photons from the background, near the wall, since neutrals exist there as well, but they will be much colder than the plasma temperature.

This page was recovered in October 2009 from the Plasmagicians page on Generals_1999_I_3 dated 22:28, 17 April 2007.