An Update on W I and W II Atomic Data for use in Erosion, Redeposition, and Transport Studies

In support of tungsten experiments on DIII-D, we present a summary of the excited state ionization calculations for neutral W and recommend a set of rate coefficients for use in plasma modeling and diagnostics. For redeposition measurements, emission from higher charge states must also be used, so, we also report on a new $R$-matrix calculation for electron impact excitation of W$^{\mathrm{+}}$, comparing with spectral observations from the Auburn CTH experiment, as well as preliminary $R$-matrix with pseudostates calculations for the electron-impact ionization of W$^{\mathrm{+}}$ and W$^{\mathrm{2+}}$. Spectroscopic techniques to measure erosion, re-deposition, and transport for tungsten plasma facing components require accurate atomic data, with the near-neutral ion stages being the most critical. The available atomic data has been undergoing significant improvements in the past few years using large-scale quantal calculations. This work updates the progress on these calculations and reviews the current status.