CLIQ对HL-LHC四极磁体训练的影响
Effect of CLIQ on training of HL-LHC quadrupole magnets
AI总结：
本文研究CLIQ装置对HL-LHC Nb3Sn四极磁体训练的影响，基于电容放电导致半线圈电流调制的原理，分析BNL所有MQXFA磁体数据，探讨训练效应及启示。
摘要：
高亮度LHC升级需要比LHC更强的低β四极磁体，以达到项目的亮度目标。该项目进展顺利，HL-LHC四极磁体目前正在美国实验室（MQXFA磁体）和CERN（MQXFB磁体）进行调试。这些是首批用于任何大型粒子加速器的Nb3Sn磁体。在开发阶段，许多Nb3Sn加速器缩比模型表现出相对缓慢的训练，且MQXFA磁体预计在达到运行场之前会发生数十次失超。最近研究表明，基于电容的专用装置可以影响Nb3Sn磁体训练，并有人提出CLIQ（一种用于失超保护的电容装置）也能产生影响。本文利用四极磁体中只有一半线圈在失超时因电容放电而经历向上电流调制这一基本事实，研究了CLIQ可能引起的训练效应。该研究涵盖了迄今为止在BNL训练的所有MQXFA生产磁体。目前尚无其他来自相同磁体（系列）且具有CLIQ保护的高统计量数据。本文讨论了数据分析带来的启示和机遇，并得出了结论。
英文摘要：
The high-luminosity LHC upgrade requires stronger than LHC low-beta quadrupole magnets to reach the luminosity goals of the project. The project is well advanced and HL-LHC quadrupole magnets are currently being commissioned in US Labs (MQXFA magnets) and CERN (MQXFB magnets). Those are the first Nb3Sn magnets to be used in any large particle accelerator. At development stages, many Nb3Sn accelerator sub-scale models showed relatively slow training and MQXFA magnets were projected to have low tens of quenches before reaching operational field. Recently it was shown that dedicated capacitor-based devices can affect Nb3Sn magnet training, and it was suggested that CLIQ, a capacitor-based device intended for quench protection, can do too. The present paper investigates effects on training likely induced by CLIQ, using the base fact that only half the coils in a quadrupole experience upward current modulation at quench because of capacitor discharge. The study encompasses all MQXFA production magnets trained at BNL to date. No other high-statistics data from identical magnets (series) with CLIQ protection exist so far. Implications and opportunities stemming from data analysis are discussed and conclusions drawn.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
