Title :
Observations of the PSR transverse instability
Author :
Colton, E. ; Fitzgerald, D. ; Hardek, T. ; Macek, R. ; Plum, M. ; Thiessen, H. ; Wang, T. ; Neuffer, D.
Author_Institution :
US DOE, Washington, DC, USA
Abstract :
A fast instability with beam loss is observed in the Los Alamos Proton Storage Ring (PSR) when the injected beam current exceeds thresholds, with both bunched and unbunched beams. Large coherent transverse oscillations occur before and during beam loss. Recent observations of the instability indicate that it is an e-p-type instability, driven by coupled oscillations due to electrons trapped within the proton beam.<>
Keywords :
particle beam diagnostics; proton accelerators; storage rings; Los Alamos Proton Storage Ring; PSR; beam loss; coherent transverse oscillations; coupled oscillations; fast instability; injected beam current; particle beam diagnostics; unbunched beams; Electron beams; Electron traps; Frequency; Impedance; Laboratories; Optical coupling; Particle beam injection; Particle beams; Protons; US Department of Energy;
Conference_Titel :
Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0135-8
DOI :
10.1109/PAC.1991.164814
