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正电子对撞机正电子源。应用于ILC和CLIC

Positrons sources for electron-positron colliders. Application to ILC and CLIC
课程网址: http://videolectures.net/cernacademictraining08_chehab_psep/  
主讲教师: Robert Chehab
开课单位: 巴黎大学
开课时间: 2010-09-17
课程语种: 英语
中文简介:
电子对撞机对正电子源的要求越来越高，这推动了针对新型电子源的研究。考虑了不同类型的正电子源极化和无极化。对其主要特征(强度、发射度)进行了描述和分析。并对不同来源进行了比较。碰撞点上可用正电子束的特性很大程度上取决于捕获装置和正电子加速器。考虑了不同类型的捕集系统，并对其性能进行了比较。对撞器所必需的强正电子源需要强入射光束(电子或光子)。在靶体中产生的大量对会导致重要的能量沉积，因此，与温度梯度相关的热加热会引起机械应力，通常具有破坏性。此外，重要的库仑碰撞，会影响晶体目标的原子结构和辐射电阻是人们关注的问题。将介绍正电子源的所有方面(与正电子生成、正电子捕获和传输、目标行为相关的物理过程)。
课程简介: The increased demanding qualities for positron sources dedicated to e+e- colliders pushed on investigations oriented on new kinds of e+ sources. The different kinds of positron sources polarized and no polarized are considered. Their main features (intensity, emittance) are described and analysed. Comparison between the different sources is worked out. The characteristics of the positron beam available in the collision point are greatly depending on the capture device and on the positron accelerator. Different kinds of capture systems are considered and their qualities, compared. Intense positron sources which are necessary for the colliders require intense incident beams (electrons or photons). The large number of pairs created in the targets leads to important energy deposition and so, thermal heating, which associated to temperature gradients provoke mechanical stresses often destructive. Moreover, the important Coulomb collisions, can affect the atomic structure in crystal targets and the radiation resistance is of concern. The description of all the aspects of the positron sources (physical processes associated to positron generation, positron capture and transport, target behaviour) will be presented.
关 键 词: 电子对撞机; 正电子源; 正电子源极化; 正电子加速器; 捕获系统
课程来源: 视频讲座网
最后编审: 2019-10-22：cwx
阅读次数: 44

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