  The EXoplanetary Circumstellar Environments and Disk Explorer (EXCEDE)
science mission concept uses a visible-wavelength Phase-Induced Amplitude
Apodization (PIAA) coronagraph to enable high-contrast imaging of circumstellar
debris systems and some giant planets at angular separations reaching into the
habitable zones of some of the nearest stars. We report on the experimental
results obtained in the vacuum chamber at the Lockheed Martin Advanced
Technology Center in 10% broadband light centered about 650 nm, with a median
contrast of $1 \times 10^{-5}$ between 1.2 and 2.0 $\lambda$/D simultaneously
with $3 \times 10^{-7}$ contrast between 2 and 11 $\lambda/D$ for a
single-sided dark hole using a deformable mirror (DM) upstream of the PIAA
coronagraph. These results are stable and repeatable as demonstrated by three
measurements runs with DM settings set from scratch and maintained on the best
90% out of the 1000 collected frames. We compare the reduced experimental data
with simulation results from modeling observed experimental limits; observed
performance is consistent with uncorrected low-order modes not estimated by the
Low Order Wavefront Sensor (LOWFS). Modeled sensitivity to bandwidth and
residual tip/tilt modes is well-matched to the experiment.
