Keren Li Supervisor: Tanaji Sen July 15, 2001 Long range - PowerPoint PPT Presentation

Oct 18, 2022 •163 likes •214 views

Keren Li Supervisor: Tanaji Sen July 15, 2001 Long range interaction without crab cavity causes geometrical luminosity loss: A crab cavity deflects the beams transversely and can increase luminosity. But nonlinear EM fields in the cavity may

Keren Li Supervisor: Tanaji Sen July 15, 2001
Long range interaction without crab cavity causes geometrical luminosity loss: A crab cavity deflects the beams transversely and can increase luminosity. But nonlinear EM fields in the cavity may cause accidental beam loss. We study the effects of a crab cavity by analyzing data from a J lab model. Picture taken from Calage et al. “LHC CRAB - CAVITY ASPECTS AND STRATEGY”
Equations of motion of a particle are given in terms of the field (E, H) components and their first order partial derivatives. We have discrete measurements of field components from J lab, therefore we want to interpolate the data as well as take the derivatives in order to study the beam motion. Some interpolation results using Mathematica. E y vs (x,y) E y vs (x,y) E y vs (x,y)
In the analytical function test, large errors are seen when the data changes quickly Large error in numerical differentiation through interpolation, especially near local extrema We are working on solving those problems and applying the numerical results to solving the EOMs.

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