Commissioning of the electron injector for the AWAKE experiment
Commissioning of the electron injector for the AWAKE experiment
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DOI：
10.1016/j.nima.2019.163194
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发表时间：
2020-02
期刊：
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通讯作者：
Seong-Yeol Kim;S. Doebert;O. Apsimon;R. Apsimon;G. Burt;M. Dayyani;S. Gessner;I. Gorgisyan;Eduardo Granados;S. Mazzoni;J. Moody;M. Turner;B. Williamson;M. Chung
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文献类型：
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作者：
Seong-Yeol Kim;S. Doebert;O. Apsimon;R. Apsimon;G. Burt;M. Dayyani;S. Gessner;I. Gorgisyan;Eduardo Granados;S. Mazzoni;J. Moody;M. Turner;B. Williamson;M. Chung
欧洲核子研究中心的先进尾流场实验（AWAKE）是第一个质子束驱动等离子体尾流场加速实验。AWAKE RUN 1的主要目标是演示质子束和电子见证束在等离子体尾流场加速的种子自调制（SSM）。在AWAKE实验中，一个10米长的铷蒸气电池和一个用于电离的高功率激光器被用来产生等离子体。等离子体尾流场由从超级质子同步加速器（SPS）中提取的400 GeV/c质子束驱动，该质子束在等离子体中经历了种子自调制过程。用于探测尾流场的电子束由s波段射频光电阴极枪产生，然后由一个助推器结构加速到16到20兆电子伏之间的能量。首次运行的AWAKE实验表明，等离子细胞后的最大能量增益为2 GeV，并验证了质子束的SSM机制。在本文中，我们将详细介绍AWAKE电子注入器。将电子束尺寸、能量和归一化发射度等参数与仿真结果进行了比较。
The advanced wakefield experiment (AWAKE) at CERN is the first proton beam-driven plasma wakefield acceleration experiment. The main goal of AWAKE RUN 1 was to demonstrate seeded self-modulation (SSM) of the proton beam and electron witness beam acceleration in the plasma wakefield. For the AWAKE experiment, a 10-meter-long Rubidium-vapor cell together with a high-power laser for ionization was used to generate the plasma. The plasma wakefield is driven by a 400 GeV/c proton beam extracted from the super proton synchrotron (SPS), which undergoes a seeded self-modulation process in the plasma. The electron witness beam used to probe the wakefields is generated from an S-band RF photo-cathode gun and then accelerated by a booster structure up to energies between 16 and 20 MeV. The first run of the AWAKE experiment revealed that the maximum energy gain after the plasma cell is 2 GeV, and the SSM mechanism of the proton beam was verified. In this paper, we will present the details of the AWAKE electron injector. A comparison of the measured electron beam parameters, such as beam size, energy, and normalized emittance, with the simulation results was performed.