Title :
Transverse equilibria in linear collider beam-beam collisions
Author :
Rosenzweig, J.B. ; Chen, Pisin
Author_Institution :
Dept. of Phys., California Univ., Los Angeles, CA, USA
Abstract :
An analytical model of the equilibrium approached by the beams, that of a generalized Bennett pinch which develops through collisionless damping due to the strong nonlinearity of the beam-beam interaction is presented. In order to calculate the equilibrium pinched beam size, an estimation of the RMS emittance growth is made which takes into account the partial adiabaticity of the collision. This pinched beam size is used to derive the luminosity enhancement factor, whose scaling is in agreement with the simulation results for both D and thermal factor A= sigma /sub z// beta * large, and explains the previously noted cubic relationship between round and flat beam enhancement factors.<>
Keywords :
beam handling techniques; linear accelerators; RMS emittance growth; analytical model; beam-beam interaction; collisionless damping; cubic relationship; flat beam enhancement; generalized Bennett pinch; linear collider beam-beam collisions; luminosity enhancement factor; partial adiabaticity; pinched beam size; scaling; strong nonlinearity; thermal factor; transverse equilibria; Analytical models; Colliding beam accelerators; Colliding beam devices; Damping; Linear accelerators; Maxwell equations; Particle beams; Physics; Probability distribution; Space charge;
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.1991.165242
