  The Medipix3, a hybrid pixel detector with a silicon sensor, has been
evaluated as a beam instrumentation device with proton and carbon ion
measurements in the non-clinical research room (IR1) of MedAustron Ion Therapy
Center. Protons energies are varied from 62.4 to 800 MeV with $10^{4}$ to
$10^{8}$ protons per second impinging on the detector surface. For carbon ions,
energies are varied from 120 to 400 MeV/amu with $10^{7}$ to $10^{8}$ carbon
ions per second. Measurements include simultaneous high resolution, beam
profile and beam intensity with various beam parameters at up to 1000 FPS
(frames per second), count rate linearity and an assessment of radiation damage
after the measurement day using an x-ray tube to provide a homogeneous
radiation measurement. The count rate linearity is found to be linear within
the uncertainties (dominated by accelerator related sources due to special
setup) for the measurements without degraders. Various frequency components are
identified within the beam intensity over time firstly including 49.98 Hz with
standard deviation, $\sigma=0.29$, secondly 30.55 Hz $\sigma=0.55$ and thirdly
252.51 Hz $\sigma=0.83$. A direct correlation between the number of zero
counting and noisy pixels is observed in the measurements with the highest
flux. No conclusive evidence of long term radiation damage was found as a
result of these measurements over one day.
