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1.5米迴旋加速器正式投入运行半年后,发生一起D型盒铝骨架打坏事故。事故前的运行条件是频宽比为5,在第一组透镜前的7A靶上的流强是30微安。在发生事故时,曾发现真空
After the 1.5-meter cyclotron was officially put into operation for six months, a D-box aluminum frame broke accident. The pre-accident operating conditions were a bandwidth ratio of 5 and flow intensity on the 7A target in front of the first lens set at 30 microamps. In the event of an accident, a vacuum was found