PAC2013 - List of Authors (Shen, X.)

Paper	Title	Page
TUPAC12	A Graphic Interface for Full Control of the RHIC Optics	472
	G. Robert-Demolaize, M. Bai BNL, Upton, Long Island, New York, USA X. Shen Indiana University, Bloomington, Indiana, USA
	Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. A high level application has been developed for the RHIC collider to provide a complete package for optics control. Optics can be measured using three different algorithms to process turn-by-turn (TBT) beam position monitor (BPM) data from either free (tune meter) or driven (AC dipole) betatron oscillations, and corrected via SVD on a response matrix built around specific sets of quadrupoles. The following reviews the details of those methods, and includes the first results of the operational commissioning of the application.

TUPBA04	AC Dipole Based Optics Measurement and Correction at RHIC	526
	X. Shen, S.-Y. Lee IUCEEM, Bloomington, Indiana, USA M. Bai, Y. Luo, A. Marusic, G. Robert-Demolaize, S.M. White BNL, Upton, Long Island, New York, USA R. Tomás CERN, Geneva, Switzerland
	Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. Independent component analysis (ICA) was applied to the AC dipole based optics measurement at RHIC to extract beta functions as well as phase advances at each BPM. Existence of excessive beta-beat was observed in both rings of RHIC at store energy. A unique global optics correction scheme was then developed and tested successfully during the RHIC polarized proton run in 2013. The feasibility of using closed orbit bump and sextupole for arc beta-beat correction was also demonstrated. The technique and experimental results of optics correction are reported in this paper.

Paper

Title

Page

A Graphic Interface for Full Control of the RHIC Optics

472

G. Robert-Demolaize, M. Bai
BNL, Upton, Long Island, New York, USA
X. Shen
Indiana University, Bloomington, Indiana, USA

Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.
A high level application has been developed for the RHIC collider to provide a complete package for optics control. Optics can be measured using three different algorithms to process turn-by-turn (TBT) beam position monitor (BPM) data from either free (tune meter) or driven (AC dipole) betatron oscillations, and corrected via SVD on a response matrix built around specific sets of quadrupoles. The following reviews the details of those methods, and includes the first results of the operational commissioning of the application.

TUPBA04

AC Dipole Based Optics Measurement and Correction at RHIC

526

X. Shen, S.-Y. Lee
IUCEEM, Bloomington, Indiana, USA
M. Bai, Y. Luo, A. Marusic, G. Robert-Demolaize, S.M. White
BNL, Upton, Long Island, New York, USA
R. Tomás
CERN, Geneva, Switzerland

Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.
Independent component analysis (ICA) was applied to the AC dipole based optics measurement at RHIC to extract beta functions as well as phase advances at each BPM. Existence of excessive beta-beat was observed in both rings of RHIC at store energy. A unique global optics correction scheme was then developed and tested successfully during the RHIC polarized proton run in 2013. The feasibility of using closed orbit bump and sextupole for arc beta-beat correction was also demonstrated. The technique and experimental results of optics correction are reported in this paper.