Overview of the 2007 NSTX experimental campaign*

The 2007 experimental campaign covered a wide range of scientific topics. Measurements of the turbulent electron fluctuation spectrum were made in many different plasma conditions including H-mode plasmas, L-mode plasmas, and plasmas with internal transport barriers using the microwave scattering system which spans a range in wavenumber to $k_\perp \rho_e \sim 1$ . RWM feedback control has been explored with and without correction of time-varying error fields, allowing mode stabilization and plasma rotation sustainment throughout the discharge. The upgraded lithium evaporator was used extensively and was observed to raise the electron temperature in H-mode plasmas. Improved mode conversion of Electron Bernstein wave emission was observed in high elongation H-mode plasmas after lithium evaporation. A new Alfv\'en wave was observed, the $\beta$-induced Alfv\'en eigenmode, and $\beta$ suppression of Alfv\'en cascades was also observed. Deuterium puffing has been used to produce partial divertor detachment in highly shaped plasmas without affecting plasma performance. A record electron temperature of 4.7keV was achieved using HHFW heating. Plasmas with high elongation $\kappa \sim 2.6$ have been maintained with high non-inductive current fraction $f_{NI} \sim 0.55$. These and other results will be summarized. *This work was supported by DoE contract No. DE-AC02-76CH03073