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Title: Reduction of beta* and increase of luminosity at RHIC

Abstract

The reduction of {beta}* beyond the 1m design value at RHIC has been consistently achieved over the last 6 years of RHIC operations, resulting in an increase of luminosity for different running modes and species. During the recent 2007-08 deuteron-gold run the reduction to 0.70 from the design 1m achieved a 30% increase in delivered luminosity. The key ingredients allowing the reduction have been the capability of efficiently developing ramps with tune and coupling feedback, orbit corrections on the ramp, and collimation, to minimize beam losses in the final focus triplets, the main aperture limitations for the collision optics. We will describe the operational strategy used to reduce the {beta}*, at first squeezing the beam at store, to test feasibility, followed by the operationally preferred option of squeezing the beam during acceleration, and the resulting luminosity increase. We will conclude with future plans for the beta squeeze.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
Doe - Office Of Science
OSTI Identifier:
952557
Report Number(s):
BNL-81845-2009-CP
KB0202011; TRN: US0902544
DOE Contract Number:  
DE-AC02-98CH10886
Resource Type:
Conference
Resource Relation:
Conference: Particle Accelerator Conference; Vancouver, B.C., Canada; 20090504 through 20090508
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATION; ACCELERATORS; APERTURES; DESIGN; FEEDBACK; LUMINOSITY; OPTICS; TRIPLETS

Citation Formats

Pilat, F, Bai, M, Bruno, D, Cameron, P, Della Penna, A, Drees, A, Litvinenko, V, Luo, Y, Malitsky, N, Marr, G, Ptitsyn, V, Satogata, T, Tepikian, S, and Trbojevic, D. Reduction of beta* and increase of luminosity at RHIC. United States: N. p., 2009. Web.
Pilat, F, Bai, M, Bruno, D, Cameron, P, Della Penna, A, Drees, A, Litvinenko, V, Luo, Y, Malitsky, N, Marr, G, Ptitsyn, V, Satogata, T, Tepikian, S, & Trbojevic, D. Reduction of beta* and increase of luminosity at RHIC. United States.
Pilat, F, Bai, M, Bruno, D, Cameron, P, Della Penna, A, Drees, A, Litvinenko, V, Luo, Y, Malitsky, N, Marr, G, Ptitsyn, V, Satogata, T, Tepikian, S, and Trbojevic, D. 2009. "Reduction of beta* and increase of luminosity at RHIC". United States. https://www.osti.gov/servlets/purl/952557.
@article{osti_952557,
title = {Reduction of beta* and increase of luminosity at RHIC},
author = {Pilat, F and Bai, M and Bruno, D and Cameron, P and Della Penna, A and Drees, A and Litvinenko, V and Luo, Y and Malitsky, N and Marr, G and Ptitsyn, V and Satogata, T and Tepikian, S and Trbojevic, D},
abstractNote = {The reduction of {beta}* beyond the 1m design value at RHIC has been consistently achieved over the last 6 years of RHIC operations, resulting in an increase of luminosity for different running modes and species. During the recent 2007-08 deuteron-gold run the reduction to 0.70 from the design 1m achieved a 30% increase in delivered luminosity. The key ingredients allowing the reduction have been the capability of efficiently developing ramps with tune and coupling feedback, orbit corrections on the ramp, and collimation, to minimize beam losses in the final focus triplets, the main aperture limitations for the collision optics. We will describe the operational strategy used to reduce the {beta}*, at first squeezing the beam at store, to test feasibility, followed by the operationally preferred option of squeezing the beam during acceleration, and the resulting luminosity increase. We will conclude with future plans for the beta squeeze.},
doi = {},
url = {https://www.osti.gov/biblio/952557}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon May 04 00:00:00 EDT 2009},
month = {Mon May 04 00:00:00 EDT 2009}
}

Conference:
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