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arXiv 1506.01099physics.acc-ph
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高梯度直线加速器球形复合加速腔的研究

Investigating of Spherical Composite Accelerating Cavity for High Gradient Linacs

TianXiu-fang, Zhang Jiandong, Xun Deguo, Liu Kun, Hou yong, Cheng Jian

摘要:

在传统的加速结构中,加速场的最大幅度受到电子击穿和导电壁中焦耳热损失的限制。本文提出了一种谐振复合加速腔,它利用了一个周期性结构,在一个球形导体腔的中心放置一个介质球。在谐振腔的中心部分中的电介质球的存在将磁场最大值从靠近金属壁的区域转移到电介质表面,这大大降低了壁中的趋肤效应损耗。利用现有的超低损耗蓝宝石晶体管,通过MATLAB进行理论分析和数值计算,并进一步利用CST进行仿真计算进行比较。结果表明,在金属壁的所有场分量要么是零或非常小,因此可以预期的腔是不太容易发生电击穿比传统的腔。此外,品质因数Q可以比现有圆柱形腔中获得的品质因数高三个数量级。

英文摘要:

Maximum amplitudes of accelerating fields are restricted by electron breakdown and Joule heating losses in conducting walls in traditional accelerating structures. In this paper, we presented a resonant composite accelerating cavity, which utilizes a periodic structure with a dielectric sphere located at a spherical conducting cavity center. The presence of the dielectric sphere in the central part of the resonance cavity shifts the magnetic fields maximum from regions close to the metallic wall to the dielectric surface, which strongly lowers the skin effect losses in the wall. By using the existing ultra-low loss Sapphire dielectrics, we made theoretical analyze and numerical calculations by MATLAB, and further make simulated calculation by CST for comparison. The results show that all field components at the metallic wall are either zero or very small, and therefore one can expect the cavity to be less prone to electrical breakdowns than the traditional cavity. Furthermore, the quality factor Q can be three orders of magnitude higher than that obtained in existing cylindrical cavities.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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