Title :
Observation of intensity dependent losses in Au(15+) beams
Author :
Blaskiewicz, M. ; Ahrens, L.A. ; Hseuh, H.C. ; Roser, T. ; Shoji, Y. ; Zeno, K.
Author_Institution :
AGS Dept., Brookhaven Nat. Lab., Upton, NY, USA
Abstract :
During the 1994 heavy ion run at Brookhaven a strongly intensity dependent loss for the Au(15+) beam in the AGS Booster was encountered. Coherent instabilities or space charge induced stopband losses were neither expected nor consistent with the data. It was found that the beam lifetime was an order of magnitude shorter for normal operating conditions than in the low intensity limit with the inverse lifetime increasing monotonically with the injected number of particles. Studies data are presented and the Au(15+) situation is compared with that for Au(33+). Various hypothetical mechanisms are considered
Keywords :
gold; ion accelerators; ion beams; particle beam stability; positive ions; space charge; synchrotrons; AGS Booster; Au; Au(15+) beams; Au(33+); Brookhaven heavy ion run; beam lifetime; coherent instabilities; intensity dependent losses; inverse lifetime; low intensity limit; normal operating conditions; space charge induced stopband losses; strongly intensity dependent loss; Acceleration; Cooling; Current transformers; Gold; History; Magnetic fields; Particle beam injection; Particle beams; Protons; Space charge;
Conference_Titel :
Particle Accelerator Conference, 1995., Proceedings of the 1995
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2934-1
DOI :
10.1109/PAC.1995.504667
