학술논문
Measurement and Optimization of Local Coupling from RHIC BPM Data
Document Type
Conference
Author
Source
Proceedings of the 2005 Particle Accelerator Conference Particle Accelerator Conference, 2005. PAC 2005. Proceedings of the. :3553-3555 2005
Subject
Language
ISSN
1944-4680
2152-9582
2152-9582
Abstract
Global coupling in RHIC is routinely corrected by using three skew quadrupole families to minimize the tune split (ΔQ min ). In this paper we propose to re-optimize transverse coupling by minimizing the resonance driving terms (RDT’s) and the coupling matrix (|C̄|/γ 2 ) in two steps: 1. Identify locations with coupling sources by inspection of the driving terms and the C-matrix around the ring and minimize the discontinuities and 2. Find the best configuration of the three skew quadrupole families to minimize both ΔQ min and RDTs (f 1001 ). The measurements of f1001 and |C|/γ 2 at injection and top energy to identify local coupling sources are presented.