Absolute calibration up to 20 MeV of an online readout CMOS system suitable to detect high-power lasers accelerated protons

We present the design and absolute calibration of a charged particle online readout CMOS system tailored for high-power laser experiments. This equips Thomson parabola spectrometer, which is used at Apollon petawatt scale facility to measure spectra protons produced by high-intensity laser–target interactions. The RadEye1 matrices array detectors are paired with custom triggering image grabbing. allows us register proton ion signals remotely. repetition rate presently 1 shot/min, but frame grabbing enables be compatible modern lasers running, e.g., Hz. detail here implementation, in harsh electromagnetic environment such interactions, system, its calibration, was performed energies from 4 20 MeV.