The development of a beam position monitor based on Cherenkov diffraction radiation for operation at the AWAKE experiment.

觉醒合作组织提出了一项第二轮实验。唤醒运行2的目的是证明电子加速到更高的能量，同时保持束流质量，即发射度和电荷保持。这一过程应该可以扩展到更长的长度，并将需要血浆细胞技术的重大发展。RUN 2的最终目标是充分演示AKAKE方案，使基于该方案的粒子物理实验在2020年后半期成为可能。电子束线的设计和交付以及射频(RF)工程方面的经验将对设计能量为O(100)MeV的新电子束线的努力至关重要。考虑到在运行1中遇到的挑战，见证电子束的注入被认为是运行2的关键任务之一，必须进行仔细的设计和调试。特别是，拥有所有这些方面的专业知识，包括优化和数据获取，将显著提高实验可能的物理输出。射频定时是Run 1的另一个限制，这方面的改进已经开始，并将是Run 2的关键。控制更精确、在所有轴上明显更小的电子束是我们有能力迎接的挑战。我们将应用我们在交付尖端和众所周知的诊断系统方面的知名专业知识来开发一套仪器，使我们能够充分表征加速前后的电子束。这对于将唤醒计划发展成未来加速器可用的技术的目标至关重要。同样重要的是，一个广泛的诊断套件将允许我们在获取数据的同时调整和改进实验。因此，我们建议提供仪器，以测量初始和加速电子束的发射度；初始和加速电子束以及质子束的长度和横向范围；以及加速电子能量分布。

the AWAKE Collaboration is proposing a Run 2 experiment. The aims of the AWAKE Run 2 are to demonstrate acceleration of electrons to higher energies, whilst preserving beam quality, i.e. emittance, and charge preservation. The process should be scalable to longer lengths and will requiresignificant development of plasma cell technology. The ultimate aim of Run 2 is to have demonstrated the AWAKE scheme sufficiently such that particle physics experiments based on this scheme could be possible in the second half of the 2020s.Expertise in design and delivery of electron beamlines as well as radio-frequency(RF) engineering will be crucial to the effort to design a new electron beamline with energies of O(100) MeV. The injection of the witness electron bunch is recognised as one of the key Run 2 tasks given the challenges experienced in Run 1 and careful design and commissioning will be necessary. In particular, having expertise involved in all of these aspects, including optimisation and data taking, will significantly enhance the possible physics output of the experiment. The RF timing is another limitation from Run 1 and improvements to this have already started and will be vital for Run 2. Control of the more precise, significantly smaller in all axes, electron bunches presents a challenge we are well-equipped to meet.We will apply our well-known expertise in delivery of cutting-edge and well-understood diagnostic systems to develop a suite of instrumentation which will allow us to fully characterise the electron beam before and after acceleration. This is essential for the aim of developing the AWAKE scheme into a useable technology for future accelerators. No less important, an extensive diagnostics suite will allow us to tuneand improve the experiment whilst taking data. We therefore propose to deliver instruments to measure the emittance of the initial and accelerated electron bunches; the length and transverse extent of the initial and and accelerated electron bunches as well as the proton bunches; and the accelerated electron energy distribution.