The Space Coronagraph Optical Bench (SCoOB): 11. status of ongoing upgrades and vacuum performance

The space coronagraph optical bench (SCoOB) previously demonstrated ~10^-9 narrowband and ~10^-8 broadband contrast performance. In the last year, the testbed has undergone major upgrades, including a 100%-yield BMC Kilo-C deformable mirror, a black silicon pupil stop, wedged quarter wave plate retarders and polarizers, improved sensor cooling, and a microfabricated field stop. In this work, we present the contrast performance of the testbed after these upgrades for three different coronagraph architectures: a) a vector vortex mask with polarization filtering, b) a triple grating vector vortex mask with and without polarization filtering, and c) a carbon nanotube shaped pupil mask. We report the latest broadband performance of the testbed using multi-band electric field conjugation for improved broadband control and wavefront stabilization via Lyot low-order wavefront sensing and control, as well as our progress in pushing toward bluer wavelengths.