Abstract
We investigate the potential use of line ratio diagnostics to evaluate electron temperature in either helium or helium seeded argon plasmas. Plasmas are produced in a helicon plasma source. A rf compensated Langmuir probe is used to measure both the electron temperature and plasma density while a spectrometer is used to measure He I line intensities from the plasma. For all plasma densities where the electron temperature remains at 5 ± 1 eV, three He line ratios are measured. Each experimental ratio is compared with the prediction of three different collisional radiative models. One of these models makes uses of recent R-matrix with pseudo-states calculations for collisional rate coefficients. A discussion related to the different observations and model predictions is presented.
Original language | English |
---|---|
Pages (from-to) | 470-479 |
Number of pages | 10 |
Journal | Plasma Sources Science and Technology |
Volume | 16 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2007 |