Orbit response matrix measurements for 10Hz global orbit feedback in RHIC

Liu, C. ; Minty, M.

Brookhaven National Laboratory (BNL) Relativistic Heavy Ion Collider

关键词: Power Supplies;    Feedback;    Testing;    43 Particle Accelerators;    Quadrupoles;   

DOI  :  10.2172/993469
RP-ID  :  BNL--94316-2010-IR
RP-ID  :  DE-AC02-98CH10886
RP-ID  :  993469

美国|英语

来源: UNT Digital Library

【 摘 要 】

The 10 Hz global orbit feedback system (gofb) was designed to correct the 10 Hz horizontal beam perturbations in both rings that are suspected to be caused by vibrations of the final focusing quadrupoles (triplets). The full system envisioned for Run-11 consists of 36 BPMs, corresponding to 2 per triplet in each of the 12 triplet locations and two in each of the 6 arcs, and 1 dipole corrector at each triplet location for a total of 12 correctors. Prototype testing was successfully carried out during RHIC Run-10 in store condition with 4 new dipole correctors (with independent power supplies) and 8 stripline beam position monitors (BPMs) per accelerator. An SVD-based algorithm was used to compute the applied corrections. For Run-10, the response matrix was provided by W. W. MacKay. The response matrix R relates corrector angles to beam displacements at BPMs.