Detector for online measurement of beam profile uniformity

The invention belongs to the technical field of proton (or heavy ion) single-particle effect test, and relates to a radiation detecting device, and particularly to a detector for online measurement of beam profile uniformity. The detector comprises an ionization chamber housing, an ionization chamber unit, an entrance window and an exit window. The entrance window and the exit window are successively arranged on the external surface of the ionization chamber housing in the direction of an accelerator beam. The ionization chamber unit is arranged between the entrance window and the exit window and is mounted in the ionization chamber housing. The ionization chamber unit comprises an anode which is made of a double-surface flexible PCB and a cathode that is made of a mylar film of which two sides are plated by aluminum. The detector has high radiation resistance and furthermore can directly perform online measurement for obtaining visual two-dimensional beam profile uniformity information. 本发明属于质子(或重离子)单粒子效应试验技