Title :
Beam lifetime and emittance growth measurements of gold beams in RHIC at storage
Author :
Fischer, W. ; Drees, A. ; Brennan, J.M. ; Connolly, R. ; Fliller, R. ; Tepikian, S. ; van Zeijts, J.
Author_Institution :
Brookhaven Nat. Lab., Upton, NY, USA
Abstract :
During stores of gold beams, longitudinal and transverse beam sizes were recorded., Longitudinal profiles were obtained with a wall current monitor. Transverse profiles were reconstructed from gold-gold collision rates at various relative transverse beam positions. The total beam lifetime was measured with a beam current transformer, the bunched beam lifetime with the wall current monitor. Diffusion rates in the beam halo were determined from the change in the loss rate when a scraper is retracted. The measurements are used to determine the lifetime limiting effects. Beam growth measurements are compared with computation´s of beam-growth times from intra-beam scattering
Keywords :
colliding beam accelerators; gold; ion accelerators; ion beams; particle beam diagnostics; storage rings; synchrotrons; Au; Au(Au,X); RHIC; beam lifetime; beam-growth times; emittance growth measurements; intra-beam scattering; lifetime limiting effects; longitudinal beam sizes; storage; transverse beam sizes; wall-current monitor; Colliding beam devices; Current measurement; Current transformers; Gold; Laboratories; Monitoring; Physics computing; Probability distribution; Scattering; Voltage;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.987420
