Detection of destruction process for bremsstrahlung converter target

The Dragon-I linear induction accelerator produces the single-pulse high current electron beam, which interacts with bremsstrahlung converter target to generate pulsed intense X-ray. The tantalum target may be ablated or even penetrated after the beam-target interaction. This paper introduces a laser detection system to detect the destruction process of the converter target. The experiment shows that the laser beam began penetrating the 0.4 mm thick target about 240 μs after the electron beam striking the target, and the penetrating process lasted 1.5 ms．