CAJ | 학술논문

研究了固定式海关集装箱检测系统用的9MeV电子行波直线加速器电子枪的结构特点和束流特性。该电子枪采用钪酸盐阴极，在灯丝电流为2.4A，阳极引出电压为-40kV的工作条件下，由电子枪发射到加速器入口处的脉冲电流强度为300mA，在加速器出口处，束斑截面小于φ2mm；打靶后，产生的X射线剂量率大于30Gy/（min*m）。为保证满足更换电子枪时的安装要求，利用EGUN程序模拟计算了该电子枪的结构及束流特性，为实际装配和使用提供了参考尺寸和调试参数。
연구료고정식해관집장상검측계통용적9MeV전자행파직선가속기전자창적결구특점화속류특성。해전자창채용항산염음겁，재등사전류위2.4A，양겁인출전압위-40kV적공작조건하，유전자창발사도가속기입구처적맥충전류강도위300mA，재가속기출구처，속반절면소우φ2mm；타파후，산생적X사선제량솔대우30Gy/（min*m）。위보증만족경환전자창시적안장요구，이용EGUN정서모의계산료해전자창적결구급속류특성，위실제장배화사용제공료삼고척촌화조시삼수。
The paper introduces the characteristics of the electron gun used in the 9MeV traveling wave electron linear accelerator for fixed customs container inspection system. With the scandate cathode, the electron gun meets the accelerator characteristics with the whole system not needing high-temperature roasting to degas. The electron gun can work normally at a vacuum of about 10－5Pa and can be reinstalled after exposure to air. In the accelerator, the electron gun emits a beam which strikes the target to produce an X-ray beam with a dosage rate of over 30Gy/(min*m) and a beam focus spot of less than φ 2mm. The EGUN code is used to simulate the structure and properties of the electron gun. The reference size debugging parameters for replacing the electron gun are given for assembly requirements．