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Title: COUPLING MEASUREMENT AND CORRECTION AT RHIC.

Abstract

Coupling correction at RHIC has been operationally achieved through a two-step process: using local triplet skew quadrupoles to compensate coupling corn rolled low-beta triplet quadrupoles, and minimizing the tune separation and residual coupling with orthogonal global skew quadrupole families. An application has been developed for global correction that allows skew quadrupole tuning and tune display with a choice of different tune measurement techniques, including tune-meter, Schottky and phase lock loop (PLL). Coupling effects have been analysed by using 1024-turn (TBT) information from the beam position monitor (BPM) system. These data allow the reconstruction of the off-diagonal terms of the transfer matrix, a measure of global coupling. At both injection and storage energies, coordination of tune meter kicks with TBT acquisition at 322 BPM's in each ring allows the measurement of local coupling at all BPM locations.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Lab., Upton, NY (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
798561
Report Number(s):
BNL-69223
R&D Project: AD003; KA0202011; TRN: US0204828
DOE Contract Number:  
AC02-98CH10886
Resource Type:
Conference
Resource Relation:
Conference: 2002 PARTICLE ACCELERATOR CONFERENCE, PARIS (FR), 06/02/2002--06/07/2002; Other Information: PBD: 2 Jun 2002
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BROOKHAVEN RHIC; COUPLING; CORRECTIONS; BEAM DYNAMICS

Citation Formats

PILAT, F, BEEBE-WANG, J, FISCHER, W, PTITSYN, V, and SATOGATA, T. COUPLING MEASUREMENT AND CORRECTION AT RHIC.. United States: N. p., 2002. Web.
PILAT, F, BEEBE-WANG, J, FISCHER, W, PTITSYN, V, & SATOGATA, T. COUPLING MEASUREMENT AND CORRECTION AT RHIC.. United States.
PILAT, F, BEEBE-WANG, J, FISCHER, W, PTITSYN, V, and SATOGATA, T. Sun . "COUPLING MEASUREMENT AND CORRECTION AT RHIC.". United States. https://www.osti.gov/servlets/purl/798561.
@article{osti_798561,
title = {COUPLING MEASUREMENT AND CORRECTION AT RHIC.},
author = {PILAT, F and BEEBE-WANG, J and FISCHER, W and PTITSYN, V and SATOGATA, T},
abstractNote = {Coupling correction at RHIC has been operationally achieved through a two-step process: using local triplet skew quadrupoles to compensate coupling corn rolled low-beta triplet quadrupoles, and minimizing the tune separation and residual coupling with orthogonal global skew quadrupole families. An application has been developed for global correction that allows skew quadrupole tuning and tune display with a choice of different tune measurement techniques, including tune-meter, Schottky and phase lock loop (PLL). Coupling effects have been analysed by using 1024-turn (TBT) information from the beam position monitor (BPM) system. These data allow the reconstruction of the off-diagonal terms of the transfer matrix, a measure of global coupling. At both injection and storage energies, coordination of tune meter kicks with TBT acquisition at 322 BPM's in each ring allows the measurement of local coupling at all BPM locations.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {6}
}

Conference:
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