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Beta* and beta-waist measurement and control at RHIC [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy, 2009.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Additional Creators
Brookhaven National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
During the course of last RHIC runs the beta-functions at the collision points (β*) have been reduced gradually to 0.7m. In order to maximize the collision luminosity and ensure the agreement of the actual machine optics with the design one, more precise measurements and control of β* value and β-waist location became necessary. The paper presents the results of the implementation of the technique applied in last two RHIC runs. The technique is based on well-known relation between the tune shift and the beta function and involves precise betatron tune measurements using BBQ system as well as specially developed knobs for β-waist location control.
Report Numbers
E 1.99:bnl--81850-2009-cp
bnl--81850-2009-cp
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Note
Published through SciTech Connect.
05/04/2009.
"bnl--81850-2009-cp"
"KB0202011"
Particle Accelerator Conference (PAC09); Vancouver, B.C., Canada; 20090504 through 20090508.
Litvinenko, V.N.; Ptitsyn,V.; Satogata, T.; Malitsky, N.; Della Penna, A.
Funding Information
DE-AC02-98CH10886
18031
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