Title :
Beam-beam interaction and high order resonances
Author :
Tepikian, S. ; Lee, S.Y.
Author_Institution :
Brookhaven Nat. Lab., Upton, NY, USA
Abstract :
There is experimental evidence from the SPS (Super Proton Synchrotron) that very high order resonance (an order>10) can cause particle loss during the beam-beam interaction. These results can be simulated by tracking a single particle against a round beam. If the round beam has an RMS size of sigma and the particle´s initial amplitude is 2 sigma then no effects are observed due to high-order resonances. However, if the particle´s initial amplitude is 5 sigma the beam-beam 16th-order resonances are strong. Furthermore, if tune modulation is added (i.e. power supply ripple) then the 5 sigma particle´s motion becomes chaotic (when it is near a 16th-order resonance) and can result in particle loss.<>
Keywords :
beam handling techniques; chaos; synchrotrons; RMS size; SPS; Super Proton Synchrotron; beam-beam 16th-order resonances; beam-beam interaction; chaotic; high order resonances; particle loss; particle´s initial amplitude; power supply ripple; round beam; tracking; tune modulation; Chaos; Colliding beam accelerators; Laboratories; Linear accelerators; Particle accelerators; Particle beams; Particle tracking; Power supplies; Protons; Resonance;
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.1991.164729
