Microwave diagnostics to measure internal magnetic fluctuations, intermediate-k density fluctuations, and flows on NSTX-U

New microwave diagnostics are being installed on the NSTX-U spherical tokamak that will address a range of important physics topics including multi-scale turbulence and transport, energetic particles, and pedestal turbulence and flows. These multi-radial point diagnostics include (a) Doppler backscattering for intermediate-k density fluctuations (\~{n}) and flows and (b) cross-polarization scattering for internal, localized magnetic fluctuations. Doppler backscattering has significant measurement capabilities and is able to measure \~{n} levels, mean and fluctuating flow, sheared flows, GAMs, ELM and EHO activity (with wavenumber range k$_{\mathrm{\theta }}\rho_{\mathrm{s}}=$0.5--10, spatial and temporal resolutions $\Delta $r$\le $1cm and $\Delta $t$\le $1$\mu $s). Cross-polarization scattering measurements of internal magnetic fluctuations cover an even broader wavenumber range (k$_{\mathrm{\theta }}\rho _{\mathrm{s}}\sim $0.2--17) with high time and space resolutions ($\Delta $r$\sim $1cm, $\Delta $t$=$1$\mu $s). Important and interesting instabilities addressed include microtearing, ITG, TEM, KBM, lower-k ETG, and kinetic Alfv\'{e}n waves.