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首页> 外文期刊>Physical Review. Accelerators and Beams >Improved control of the betatron coupling in the Large Hadron Collider
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Improved control of the betatron coupling in the Large Hadron Collider

机译：改进了大型强子对撞机中电子感应加速器耦合的控制

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摘要

The control of the betatron coupling is of importance for safe beam operation in the LHC. In this article we show recent advancements in methods and algorithms to measure and correct coupling. The benefit of using a more precise formula relating the resonance driving term ${f}_{1001}$ to the $mathrm{ensuremath{Delta}}{Q}_{min}$ is presented. The quality of the coupling measurements is increased, with about a factor 3, by selecting beam position monitor (BPM) pairs with phase advances close to $rac{ensuremath{pi}}{2}$ and through data cleaning using singular value decomposition with an optimal number of singular values. These improvements are beneficial for the implemented automatic coupling correction, which is based on injection oscillations, presented in the article. Furthermore, a proposed coupling feedback for the LHC is presented. The system will rely on the measurements from BPMs equipped with a new type of high resolution electronics, diode orbit and oscillation, which will be operational when the LHC restarts in 2015. The feedback will combine the coupling measurements from the available BPMs in order to calculate the best correction.
机译：对拍加速器耦合的控制对于大型强子对撞机中光束的安全操作至关重要。在本文中，我们展示了用于测量和校正耦合的方法和算法的最新进展。提出了使用更精确的公式将谐振驱动项$ {f} _ {1001} $与$ mathrm { ensuremath { Delta}} {Q} _ {min} $关联起来的好处。通过选择相位提前量接近$ frac { ensuremath { pi}} {2} $的光束位置监控器（BPM）对，并通过使用单数形式的数据清理，可以将耦合测量的质量提高大约3倍具有最佳数量的奇异值的值分解。这些改进对于本文中介绍的基于注入振荡的已实现的自动耦合校正是有益的。此外，提出了针对LHC的建议耦合反馈。该系统将依靠配备了新型高分辨率电子设备，二极管轨道和振荡的BPM的测量结果，当大型强子对撞机在2015年重新启动时将投入运行。反馈将结合来自可用BPM的耦合测量结果以进行计算最好的校正。

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