PAC2013 - List of Authors (White, S.M.)

Paper	Title	Page
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.

TUPBA07	Dynamic Aperture Maximization with Head-on Beam-beam Compensation in RHIC	535
	Y. Luo, W. Fischer, S.M. White BNL, Upton, Long Island, New York, USA
	Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. To minimize the large beam-beam tune spread and to reduce the beam-beam nonlinear resonance driving terms, two electron lenses are being installed in the RHIC tunnel for head-on beam-beam compensation. In this article we discuss the approaches to maximize the proton dynamic aperture by adjusting the phase advances between beam-beam interaction points, and the phase advances between the beam-beam interaction points and the electron lenses, and by choosing different β^*s at the beam-beam interaction points.

Paper

Title

Page

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.

TUPBA07

Dynamic Aperture Maximization with Head-on Beam-beam Compensation in RHIC

535

Y. Luo, W. Fischer, S.M. White
BNL, Upton, Long Island, New York, USA

Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.
To minimize the large beam-beam tune spread and to reduce the beam-beam nonlinear resonance driving terms, two electron lenses are being installed in the RHIC tunnel for head-on beam-beam compensation. In this article we discuss the approaches to maximize the proton dynamic aperture by adjusting the phase advances between beam-beam interaction points, and the phase advances between the beam-beam interaction points and the electron lenses, and by choosing different β^*s at the beam-beam interaction points.