论文标题
高能加速器相互作用区域的十二个四极杆校正
A twelve-quadrupole correction for the interaction regions of high-energy accelerators
论文作者
论文摘要
传统上，通过改变两种梁（例如三胞胎四倍体）共有的四倍体的强度来对高能相撞者的相互作用区域（IR）（IR）进行校正。本文表明，IR四极杆中的磁误差（例如匹配的四极杆）都不常见，它们都可能具有重要的影响，因此，校正还应包括这些四核。通过MADX仿真提出并验证了基于十二个IR四倍体（常见和无常见）的校正。为了估计这种校正的优势，需要三个分离IR的两个三胞胎的三个间隔空间中的动作和相位。还提出了一种估计这些数量的新方法。确定了这种新方法中不确定性的主要来源，并将其与当前使用三个梁位置监视器内的方法进行了比较。最后，LHC实验数据用于估计LHC相互作用区域1中十二个四极矫正的强度。将所得的校正与另一种称为段段（sbs）的方法估计的六四极杆校正进行了比较。
Corrections of gradient errors in the interactions regions (IRs) of high energy colliders have traditionally been made by changing the strengths of quadrupoles that are common to both beams, such as the triplet quadrupoles. This article shows that magnetic errors in the IR quadrupoles that are no common to both beams, such as the matching quadrupoles, can have an important influence and, therefore, the correction should also include these quadrupoles. A correction based on twelve IR quadrupoles (common and no common) is presented and validated through MADX simulations. To estimate the strengths of this correction, the action and phase in the inter-triplet space, the space that separates the two triplets of the IR, are required. A novel method to estimate these quantities is also presented. The main sources of uncertainties in this novel method are identified and compared to the current method that uses two beam position monitor within the inter-triplet space. Finally, LHC experimental data is used to estimate the strengths of a twelve-quadrupole correction in the interaction region 1 of the LHC. The resulting correction is compared with a six-quadrupole correction estimated with another method called segment-by-segment (SBS).
