CAJ | 학술논문

加速管是一台加速器的核心部分.一般电子辐照加速器的俘获效率在50%左右,一半的电子都损失在加速管内.丢失的电子打在加速管内壁,产生轫致辐射、腔体发热量增加、真空变坏等许多负面影响.采用一段等梯度加速结构,相速沿加速管呈线形增加,调整相速变化规律及加速管腔体的尺寸参数,设计出的加速管最终的俘获效率提高到90%以上,同时平均加速梯度没有因此降低,加速管总长度没有增加.
가속관시일태가속기적핵심부분.일반전자복조가속기적부획효솔재50%좌우,일반적전자도손실재가속관내.주실적전자타재가속관내벽,산생인치복사、강체발열량증가、진공변배등허다부면영향.채용일단등제도가속결구,상속연가속관정선형증가,조정상속변화규률급가속관강체적척촌삼수,설계출적가속관최종적부획효솔제고도90%이상,동시평균가속제도몰유인차강저,가속관총장도몰유증가.
The accelerating tube is the core of a linac. The capture efficiency is usually about 50% by ordinary design method in the electron linac for irradiation processing. Nearly half of the injected electrons are lost in the tube, resulting in strong radiation and additional heat load on the accelerating cavity, as well as a bad effect on vacuum. In this paper, a constant gradient accelerating structure is chosen to accelerate the electron beam,and the designed phase velocity is linearly increased along the tube. By adjusting the size of the accelerating cavity and the phase velocity function, a high capture efficiency is reached. After a series of simulations, we obtain a 90% capture efficiency, while the accelerator length is not increased due to the bunching process.