NEG Coatings and their Potential to Make a Major Impact on Future Advanced Particle Accelerators

NEG 涂层及其对未来先进粒子加速器产生重大影响的潜力

• 批准号: 2491274
• 金额: --
• 依托单位: University of Manchester
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2491274
• 关键词: NEG; Coatings; their; Potential; Make

Applications are invited for an exciting opportunity to study for a 3.5-year PhD commencing Oct 2019 on the development of technologies that are critical for future particle accelerators. Non-evaporable getter (NEG) coating, originally invented at CERN, is already used in many accelerators due to three main properties: (1) it reduces thermal and photon, electron and ion induced gas desorption acting as a barrier between a vacuum chamber material and an inner vacuum; (2) a fully coated vacuum chamber has large distributed pumping speed, the benefit of this is essential for the narrow vessels with a limited vacuum conductance; (3) the NEG coating has low secondary electron (SEY) yield that helps to supress electron multipacting and electron cloud in high intensity accelerators. NEG coating is the most promising and most economic solution for a vacuum system of the next generation accelerators. ASTeC, world leader in this area, is working on optimisation of NEG on optimising all three NEG coating benefits. Further development of this technology require working on interdisciplinary field: accelerator, material and vacuum science. There are two main challenges in further NEG coating optimisation: (1) the beam impedance in the NEG coated chamber, which related to beam parameters and NEG coating resistance, this is a problem for short-bunch machines; (2) coating of NEG on narrow tubes with a diameter less than 10 mm, this is a problem for small aperture machines like a future UK-XFEL.

申请人被邀请参加一个令人兴奋的机会，从2019年10月开始学习为期3.5年的博士学位，研究对未来粒子加速器至关重要的技术的发展。非蒸散吸气剂（NEG）涂层最初由CERN发明，由于三个主要特性已经用于许多加速器中：（1）它减少热和光子、电子和离子诱导的气体脱附，作为真空室材料和内部真空之间的屏障;（2）全涂层真空室具有大的分布抽速，这一优点对于真空传导有限的窄容器是必不可少的;（3）NEG涂层具有低的二次电子（SEY）产额，这有助于抑制高强度加速器中的电子微碰撞和电子云。NEG涂层是下一代加速器真空系统最有前途和最经济的解决方案。ASTeC是该领域的世界领导者，正在优化NEG涂层的所有三个优点。这项技术的进一步发展需要跨学科领域的工作：加速器，材料和真空科学。在进一步的NEG涂层优化中存在两个主要挑战：（1）NEG涂层室中的束阻抗，其与束参数和NEG涂层电阻相关，这对于短束团机器是一个问题;（2）在直径小于10 mm的窄管上的NEG涂层，这对于像未来的UK-XFEL的小孔径机器是一个问题。