Piezoprobes of design Phillips-Curzon 1 mm in diameter have been calibrated in the pressure range 0.2 to 35 atm. Step pressure pulses for the calibration were produced with plane shock waves in the range 0.2-1 atm, and with plane detonations in Acetylene-Oxygen in the range 2-35 atm. The calibrated probes were used to measure the space-time pressure profiles in I) concentric detonations II) radiation fronts behind windows and III) pressure waves induced by an intense light source. The measurements supported existing models of the dynamics of these pulsed discharges. / Science, Faculty of / Physics and Astronomy, Department of / Graduate