FCC Week 2016

Session

FCC-ee Beam-Beam & Luminosity

Wed04

13 Apr 2016, 08:30

Italy

Conveners

FCC-ee Beam-Beam & Luminosity

• Andrew Hutton (J)

146. Beam-beam simulations of FCC-ee with Lifetrac

Dmitry Shatilov (Budker Institute of Nuclear Physics (RU))

13/04/2016, 08:30

Accelerators

Oral

Beam-beam effects for FCC-ee in the energy range from 45 to 175 GeV will be discussed. An important role at such high energies plays beamstrahlung which may limit the beam lifetime and causes the bunch lengthening, the latter may enhance flip-flop instability. To perform the parameters optimization and evaluation of achievable luminosity, we used quasi-strong-strong beam-beam simulations.

340. Beam-beam simulations and ecloud in e+ ring

kazuhito ohmi (KEK)

13/04/2016, 08:50

Accelerators

Oral

174. Interplay of the beam-beam effect and the lattice nonlinearity

Prof. Demin ZHOU (KEK)

13/04/2016, 09:10

Accelerators

Oral

In this talk, I will first give a brief overview of observed interplay of beam-beam effect and the lattice nonlinearity in collider rings, and then I will present our recent work on this subject for FCC-ee. Efforts for better understanding the behind mechanism and possible compensation schemes will be discussed.

195. A new beam-beam effect in collisions with crossing angle

13/04/2016, 09:30

Accelerators

Oral

During beam collisions with a crossing angle particles get horizontal deflection with opposite direction in the head and the tail of the bunch (like does crab cavity but more nonlinear). Due to the transverse kick bunch slices (and particles) undergo betatron oscillation in the ring and come again to the IP with additional horizontal spread which (for FCC-ee) may exceed the natural beam size....