Title :
Experimental study of crossing angle collision
Author :
Chen, T. ; Rice, D. ; Rubin, D. ; Sagan, D. ; Tigner, M.
Author_Institution :
Stanford Linear Accel. Center, Stanford Univ., CA, USA
Abstract :
The non-linear coupling due to the beam-beam interaction with crossing angle has been studied. The major effect of a small (~12 mrad) crossing angle is to excite 5Qx±Qs integer coupling resonance family on large amplitude particles, which results in bad lifetime, On the CESR, a small crossing angle (~2.4 mr) was created at the IP and a reasonable beam-beam tune-shift was achieved. The decay rate of the beam is measured as a function of horizontal tune with and without crossing angle. The theoretical analysis, simulation and experimental measurements have a good agreement. The resonance strength as a function of crossing angle is also measured
Keywords :
beam handling techniques; electron accelerators; particle beam diagnostics; storage rings; tuning; CESR; beam-beam interaction; beam-beam tune-shift; crossing angle collision; integer coupling resonance family; large amplitude particles; nonlinear coupling; resonance strength; Analytical models; Counting circuits; Difference equations; Goniometers; Laboratories; Modems; Nonlinear equations; Optical modulation; Particle beam measurements; Resonance;
Conference_Titel :
Particle Accelerator Conference, 1993., Proceedings of the 1993
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-1203-1
DOI :
10.1109/PAC.1993.309690
