加速器上的脉冲大功率磁控管在超过两倍的保证寿命（５０ＨＶ小时）后常发生故障。而通常难以及时合乎性能要求地换新。但有的故障采用特殊方法尚可维持数十个至百余个ＨＶ小时而赢得缓冲机会。磁控管灯丝的角度性断续就属于这种情况。它是指如ＢＪ—４加速器的机架在最常用的 Pulsed high power magnetrons on the accelerator often fail after more than twice the guaranteed lifetime (50 HV hours). It is often difficult to renew new ones in time to meet performance requirements. However, some faults can still maintain tens of hours to more than a hundred HV hours using special methods to win the buffer. This is the case with the angular interruption of the magnetron filament. It refers to racks such as BJ-4 accelerators that are most commonly used