2020/02/13 by Javier Fernando Cardona, Cardona, Javier Fernando, Yohany Rodríguez +3
Engineering · #Accelerator Physics (physics.acc-ph) #FOS: Physical sciences #Particle Accelerators and Free-Electron Lasers #Particle accelerators and beam dynamics #Superconducting Materials and Applications
paper · pdf · doi:10.48550/arxiv.2002.05836
openalex publication_date 2020/02/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Corrections of gradient errors in the interactions regions (IRs) of high\nenergy colliders have traditionally been made by changing the strengths of\nquadrupoles that are common to both beams, such as the triplet quadrupoles.\nThis article shows that magnetic errors in the IR quadrupoles that are no\ncommon to both beams, such as the matching quadrupoles, can have an important\ninfluence and, therefore, the correction should also include these quadrupoles.\nA correction based on twelve IR quadrupoles (common and no common) is presented\nand validated through MADX simulations. To estimate the strengths of this\ncorrection, the action and phase in the inter-triplet space, the space that\nseparates the two triplets of the IR, are required. A novel method to estimate\nthese quantities is also presented. The main sources of uncertainties in this\nnovel method are identified and compared to the current method that uses two\nbeam position monitor within the inter-triplet space. Finally, LHC experimental\ndata is used to estimate the strengths of a twelve-quadrupole correction in the\ninteraction region 1 of the LHC. The resulting correction is compared with a\nsix-quadrupole correction estimated with another method called\nsegment-by-segment (SBS).\n