A beam position monitor for electron bunch detection in the presence of a more intense proton bunch for the AWAKE Experiment
A beam position monitor for electron bunch detection in the presence of a more intense proton bunch for the AWAKE Experiment
复制标题
用于在 AWAKE 实验中存在更强质子束的情况下检测电子束的束位置监视器
DOI：
10.1088/1742-6596/2420/1/012067
复制
发表时间：
2023
期刊：
影响因子：
--
通讯作者：
M. Wendt
中科院分区：
文献类型：
--
作者：
C. Pakuza;P. Burrows;R. Corsini;W. Farabolini;P. Korysko;M. Krupa;T. Lefevre;S. Mazzoni;E. Senes;M. Wendt
欧洲核子研究中心的先进质子驱动等离子体韦克菲尔德实验（AWAKE）使用从400 GeV束流能量的超级质子同步加速器（SPS）提取的6 cm长质子束流来驱动高梯度等离子体尾场，以在10 m长度内将电子束流加速到2 GeV。两个同向传播光束的位置的知识和控制是实验操作的关键。虽然在AWAKE的当前电子束位置监测系统可以在没有质子束的情况下使用，但是当两个粒子束同时存在时，质子束团信号占主导地位。基于切伦科夫衍射辐射（ChDR）的产生在一个电介质材料放置在靠近粒子束的基础上的一种新的技术已被设计成利用大束长度差的粒子束在唤醒，200 ps的质子与几个ps的电子，这样的电子信号占主导地位。因此，该技术将允许在存在更强但更长的质子聚束的情况下测量短电子聚束的位置。本文介绍了欧洲核子研究中心（CERN）研究用线性电子加速器（CLEAR）的设计考虑、数值分析和试验计划。
The Advanced Proton Driven Plasma Wakefield Experiment (AWAKE) at CERN uses 6 cm long proton bunches extracted from the Super Proton Synchrotron (SPS) at 400 GeV beam energy to drive high gradient plasma wakefields for the acceleration of electron bunches to 2 GeV within a 10 m length. Knowledge and control of the position of both copropagating beams is crucial for the operation of the experiment. Whilst the current electron beam position monitoring system at AWAKE can be used in the absence of the proton beam, the proton bunch signal dominates when both particle bunches are present simultaneously. A new technique based on the generation of Cherenkov diffraction radiation (ChDR) in a dielectric material placed in close proximity to the particle beam has been designed to exploit the large bunch length difference of the particle beams at AWAKE, 200 ps for protons versus a few ps for electrons, such that the electron signal dominates. Hence, this technique would allow for the position measurement of a short electron bunch in the presence of a more intense but longer proton bunch. The design considerations, numerical analysis and plans for tests at the CERN Linear Electron Accelerator for Research (CLEAR) facility are presented.