Attosecond electron and radiation pulse generation in the ion channel free-electron laser, based on the laser wakefield accelerators

基于激光尾场加速器的离子通道自由电子激光器中的阿秒电子和辐射脉冲生成

• 批准号: 1915695
• 金额: --
• 依托单位: University of Strathclyde
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1915695
• 关键词: Attosecond; electron; radiation; pulse; generation

Background: Laser wakefield accelerators are potentially the basis for next-generation, ultra-compact radiation sources with unique parameters. An important parameter is the electron bunch length, which is potentially several attoseconds in duration. A short bunch duration also implies a very high peak current, which is required by free-electron laser like devices, such as the ion channel laser (ICL). These devices are potential next-generation radiation sources with wide applicability; they also have a bearing on the development of new types of accelerators for colliders. At Strathclyde, we have a state-of-the-art facility (SCAPA) that is ideal for a systematic PhD project, as proposed. We are also a member of the Cockcroft Institute and thus have access to researchers developing conventional accelerators and light sources.Project: The project will contribute to the development of next-generation of coherent radiation sources based on accelerators, and extend their parameter range to attosecond durations, which would be unprecedented. An understanding of the basic physics involved in the studies will also contribute to the understanding of astrophysical events, through analogue laser-plasma interactions. State-of-the-art experimental methods will be used to measure the bunch length, e.g. by measuring coherent transition radiation, and to study the build-up of coherence in the ICL radiation source. These will be compared with theoretical models developed at Strathclyde as part of the ALPHA-X project. The student will work closely with both theory and experimental teams, and our collaborators. Experiments will utilise the 350 TW and 40 TW SCAPA lasers at Strathclyde, and the RAL-CLF and ELI lasers when high power or energies are required. Plasma media and diagnostic systems will be developed for the experiments.The project will contribute to developing ultra-compact sources with the following parameters:-Bunch durations of 10-100 attoseconds-Energy from 100 MeV to 1 GeV-Peak currents in excess of 10 kA-Coherent radiation from 1 Angstrom to 10 nm.

背景：激光尾流场加速器是具有独特参数的下一代超紧凑辐射源的潜在基础。一个重要的参数是电子束长度，它的持续时间可能是几个阿秒。短束持续时间也意味着非常高的峰值电流，这是像离子通道激光器（ICL）这样的自由电子激光设备所需要的。这些装置是潜在的下一代辐射源，具有广泛的适用性；它们还与新型对撞机加速器的开发有关。在斯特拉斯克莱德，我们有一个最先进的设施（SCAPA），是一个系统的博士项目的理想选择。我们也是科克罗夫特研究所的成员，因此可以接触到开发传统加速器和光源的研究人员。项目：该项目将有助于基于加速器的下一代相干辐射源的开发，并将其参数范围扩展到阿秒持续时间，这将是前所未有的。通过模拟激光等离子体相互作用，对研究中涉及的基本物理学的理解也将有助于对天体物理事件的理解。将使用最先进的实验方法来测量束长，例如通过测量相干跃迁辐射，并研究ICL辐射源中相干性的建立。作为ALPHA-X项目的一部分，这些模型将与Strathclyde开发的理论模型进行比较。该学生将与理论和实验团队以及我们的合作者密切合作。实验将利用斯特拉斯克莱德的350太瓦和40太瓦SCAPA激光器，当需要高功率或能量时，使用RAL-CLF和ELI激光器。将为实验开发等离子介质和诊断系统。该项目将有助于开发具有以下参数的超紧凑源：-束持续时间为10-100阿秒-能量从100 MeV到1 gev -峰值电流超过10 ka -相干辐射从1埃到10 nm。