Closed Orbit Distortion and the Beam-Beam Interaction

Furman, M. ; Chin, Y. ; Eden, J. ; /LBL, Berkeley ; Kozanecki, W. ; /DAPNIA, Saclay /SLAC ; Tennyson, J.L. ; Ziemann, V. ; /SLAC

Stanford Linear Accelerator Center

关键词: Tuning;    Beam-Beam Interactions;    43 Particle Accelerators;    Orbits;    Accelerators,Accphy;   

DOI  :  10.2172/899839
RP-ID  :  SLAC-R-855
RP-ID  :  AC02-76SF00515
RP-ID  :  899839

美国|英语

来源: UNT Digital Library

【 摘 要 】

We study the applicability of beam-beam deflection techniques as a tuning tool for the SLAC/LBL/LLNL B factory, PEP-II. Assuming that the closed orbits of the two beams are separated vertically at the interaction point by a local orbit bump that is nominally closed, we calculate the residual beam orbit distortions due to the beam-beam interaction. Difference orbit measurements, performed at points conveniently distant from the IP, provide distinct coordinate- or frequency-space signatures that can be used to maintain the beams in collision and perform detailed optical diagnostics at the IP. A proposal to test this method experimentally at the TRISTAN ring is briefly discussed.