Disruption effects from the interaction of round e+e- beams.
Disruption effects from the interaction of round e+e- beams.
复制标题
圆形电子束相互作用造成的干扰效应。
DOI：
10.1103/physrevd.38.987
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
Yokoya
中科院分区：
文献类型：
--
作者：
Chen;Yokoya
我们报告了最近关于线性对撞机中圆形 e/sup +/e/sup -/ 梁相互作用期间破坏效应的模拟结果。研究发现，除了众所周知的破坏参数D之外，破坏效果还取决于另一个参数Aequivalentsigma/sub z//..beta../sup */，其中sigma/sub z/是束长度，..beta../sup */是相互作用点处的..beta..函数。事实证明，虽然光度增强因子 H/sub D/ 仅在小 D（Dapprox <1）范围内对 A 不敏感，但破坏角增强因子 H/sub theta/ 的行为却相反。具体来说，我们发现对于大 D，H/sub theta/ 被抑制为 1/ ..sqrt..D ，并且 H/sub D/ 单调增加而不饱和。此外，对于固定 D，H/sub D/ 作为 ln(1/A) 的函数而变化。计算机分析进一步表明，在大 D 和小 A 状态中，在碰撞开始时会形成一种限制机制：一旦被挤压，粒子在整个过程中往往会被困在更小的半径内。提供了一个理论模型来定性地解释上述发现。
We report on our recent simulation results on the disruption effects during the interaction of round e/sup +/e/sup -/ beams in linear colliders. It is found that in addition to the well-known disruption parameter D, the disruption effects also depend on another parameter Aequivalentsigma/sub z//..beta../sup */, where sigma/sub z/ is the bunch length and ..beta../sup */ the ..beta.. function at the interaction point. It turns out that while the luminosity enhancement factor H/sub D/ is insensitive to A only in the small-D (Dapprox. <1) regime, the disruption-angle enhancement factor H/sub theta/ behaves oppositely. Specifically, we found that for large D, H/sub theta/ is suppressed as 1/ ..sqrt..D , and H/sub D/ increases monotonically without saturation. Moreover, for fixed D, H/sub D/ varies as a function of ln(1/A). Computer analysis further suggests that in the large-D and small-A regime a confinement mechanism is developed near the beginning of the collision: particles once pinched tend to be trapped in a much smaller radius throughout the process. A theoretical model is provided to qualitatively explain the above findings.