Improvements in Beam-beam Tail Simulations†
نویسندگان
چکیده
Our beam-beam simulation code[1] has been improved and used to study lifetime phenomena under beam-beam interaction. One phenomenon observed is high order horizontal resonances (e. g., 8th to 16th), which are found to be exceptionally strong in the horizontal tail and have significant impact on lifetime. A first order perturbation calculation gives good agreement with the simulation on resonance width and tune. Gas scattering is a new feature has been added to the program. The lifetime result is compared with analytical calculation and agrees well. The other effect studied is parasitic crossings in PEP-II. The simulation demonstrates a dramatic tail blow-up when the horizontal separation is reduced to about 70. 1 HIGH ORDER HORIZONTAL RESONANCES IN BEAM-BEAM INTERACTION
منابع مشابه
NEW PHYSICS AND IMPROVEMENTS IN BEAM-BEAM TAIL SIMULATIONSQr/xx
Our beam-beam simulation code[1] has been improved and used to study lifetime phenomena under beam-beam interaction. One phenomenon observed is high order horizontal resonances (e. g., 8th to 16th), which are found to be exceptionally strong in the horizontal tail and have significant impact on lifetime. A first order perturbation calculation gives good agreement with the simulation on resonanc...
متن کاملStudies on electron beam induced DNA damage and repair kinetics in lymphocytes by alkaline comet assay
Background: Exposure to ionizing radiation is known to induce oxidative stress followed by damage to critical biomolecules like lipids, proteins and DNA through radiolysis of cellular water. Since radiation has been widely used as an important tool in therapy of cancer, the detailed investigation regarding the DNA damage and repair kinetics would help to predict the radiation sensitivity of cel...
متن کاملCoherent Beam-Beam Instability in Collisions with a Large Crossing Angle.
In recent years the "crab-waist collision" scheme [P. Raimondi, Proceedings of 2nd SuperB Workshop, Frascati, 2006.; M. Zobov et al., Phys. Rev. Lett. 104, 174801 (2010)PRLTAO0031-900710.1103/PhysRevLett.104.174801] has become popular for circular e^{+} e^{-} colliders. The designs of several future colliders are based on this scheme. So far the beam-beam effects for collisions under a large cr...
متن کاملDynamic Stability Analysis of a Beam Excited by a Sequence of Moving Mass Particles
In this paper, the dynamic stability analysis of a simply supported beam carrying a sequence of moving masses is investigated. Many applications such as motion of vehicles or trains on bridges, cranes transporting loads along their span, fluid transfer pipe systems and the barrel of different weapons can be represented as a flexible beam carrying moving masses. The periodical traverse of masses...
متن کاملIn#uence of electron beam halos on the FEL performance
For single-pass free-electron lasers (FEL), such as ampli"ers and SASE devices, saturation of the radiation power has to be reached within the length of the undulator. Therefore, detailed knowledge of electron beam parameters is crucial. So far, simulations have been performed with a given rms emittance and energy spread. At short radiation wavelengths, bunch compressors are used to compress th...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1996