神龙一号直线感应加速器X光转换靶破坏诊断

 利用能量约450 keV、焦斑直径1~4 mm的低能X光对神龙一号直线感应加速器束靶作用后钽靶的破坏进行诊断，利用增强型电荷耦合器件（ICCD）对诊断过程记录，得到束靶作用后数μs时间内钽靶材料密度的变化。结果表明：在束靶作用后约1 μs内靶材料密度基本没有变化，且该时间段内ICCD相机没有观察到有靶前钽靶材料的微粒喷射。

Damage diagnosis for bremsstrahlung converter target of Dragon-Ⅰ linear induction accelerator

The electron beam generated by the Dragon-Ⅰ linear induction accelerator strikes the bremsstrahlung converter target to generate X-ray and causes tantalum target damage and hydrodynamic expansion, which results in target density decreasing for successive pulses. The time varying target density was measured by applying a low energy X-ray with energy about 450 keV and spot diameter of 1 to 4 mm along with an intensified charge coupled derice(ICCD) camera. The experiment results show that the target density is basically unchanged for 1 μs after beam-target interaction, and no particle ejected from the front side of the target is found at the same time.