CAJ | 학술논문

为了研究尾场效应引起的束流不稳定性,建立了由非对称Blumlein脉冲形成线、导体层和微堆层构成的介质壁加速器单元模块模型,用有限积分法对强流电子束在此结构中产生的尾场进行了计算,分别计算单组元和2组单元加速模块中的尾场势和尾场阻抗.从模拟的结果来看, x,y方向的尾场势和尾场阻抗都很小,束流尾场对横向的影响比较小.z方向的尾场势和尾场阻抗影响较大,尾场阻抗达到100 Ω量级.证明了由于介质壁加速器结构在加速腔长度和束流通过路径的连续性方面都具有很大的优势,横向阻抗小,束流尾场效应在束流不稳定性方面的影响相对较小,束流传输时的要求也会降低.
위료연구미장효응인기적속류불은정성,건립료유비대칭Blumlein맥충형성선、도체층화미퇴층구성적개질벽가속기단원모괴모형,용유한적분법대강류전자속재차결구중산생적미장진행료계산,분별계산단조원화2조단원가속모괴중적미장세화미장조항.종모의적결과래간, x,y방향적미장세화미장조항도흔소,속류미장대횡향적영향비교소.z방향적미장세화미장조항영향교대,미장조항체도100 Ω량급.증명료유우개질벽가속기결구재가속강장도화속류통과로경적련속성방면도구유흔대적우세,횡향조항소,속류미장효응재속류불은정성방면적영향상대교소,속류전수시적요구야회강저.
To study the beam instability caused by wake field effect, a dielectric wall accelerator module model consisting of asymmetric pulse forming line, micro-stacked insulator and conductor layer was established, the finite integral method was used to simulate the wake field in the accelerating structure of dielectric wan accelerator(DWA) for high-current electron beam, wake potential and wake impedance were calculated for the single and two accelerating units.The results show the wake potential and wake impedance were small in x and y directions, the wake impedance can reach hundreds of ohms in z direction. It is proved that advantageous accelerating cavity length and path continuity, the influence of beam instability is relatively small, the DWA structure the beam transmission requirements will be reduced.