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arXiv 1902.07786physics.acc-ph
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125 GeV驱动梁波荡器参数的优化

Optimization of Undulator Parameters for 125 GeV Drive Beam

Manuel Formela, Gudrid Moortgat-Pick, Sabine Riemann, Andriy Ushakov

摘要:

在国际直线对撞机(ILC)的基线设计中,为了满足物理要求,正电子源预计采用基于波荡器的源。在sqrt(s)=500 GeV处,这意味着250 GeV的电子驱动束,对ILC的基线参数进行了优化。然而,希格斯扇区中的精确测量需要在sqrt(s)=250 GeV下进行测量,即仅在125 GeV下用电子驱动束运行,这对实现高产率提出了挑战。因此,基线波荡器参数必须在其技术性能范围内尽可能地优化。因此,在这篇学士学位论文中,我们提出了一个理论研究的螺旋波荡器的辐射光谱的基础上,辐射同步辐射能量谱密度每立体角每电子在相对论,远场和点状电荷近似的方程。从这个出发点,以下波荡器的属性进行检查:在波荡器容器中的沉积功率,这可能会破坏波荡器磁体的功能,在这种干扰和由同步辐射产生的正电子在Ti6Al 4V目标的数量的掩模的保护性能。这些数量进行了评估的各种值的参数,如波荡器周期,波荡器长度和磁通量,以找到最佳的基线参数设置sqrt(s)=250 GeV。

英文摘要:

In the baseline design of the International Linear Collider (ILC) an undulator-based source is foreseen for the positron source in order to match the physics requirements. The baseline parameters are optimized for the ILC at sqrt(s)=500 GeV, that means an electron drive beam of 250 GeV. Precision measurements in the Higgs sector, however, require measurements at sqrt(s)=250 GeV, i.e. running with the electron drive beam only at 125 GeV, which imposes a challenge for achieving a high yield. Therefore the baseline undulator parameters have to be optimized as much as possible within their technical performances. In this bachelor thesis we therefore present a theoretical study on the radiation spectra of a helical undulator, based on the equation for the radiated synchrotron energy spectral density per solid angle per electron in the relativistic, far-field and point-like charge approximation. From this starting point the following undulator properties are examined: the deposited power in the undulator vessel, which can disrupt the functionality of the undulator magnets, the protective property of a mask on this disturbances and the number of positrons produced by the synchrotron radiation in a Ti6Al4V target. Those quantities were evaluated for various values for parameters as undulator period, undulator length and magnetic flux in order to find optimal baseline parameter sets for sqrt(s)=250 GeV.

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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