Photoelectrons and Multipacting in the LHC: Electron Cloud Buildup | Zendy

Gennady Stupakov | Zendy

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Photoelectrons and Multipacting in the LHC: Electron Cloud Buildup

Author(s) -

Gennady Stupakov

Publication year - 2003

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/815273

Subject(s) - electron , physics , thermal emittance , large hadron collider , beam (structure) , synchrotron radiation , photoelectric effect , cathode ray , space charge , computational physics , atomic physics , nuclear physics , optics

A simple quasi-analytic model is developed for the dynamics of electron cloud generated by synchrotron radiation of the beam in the LHC beam pipe. The model allows to obtain a multipacting condition for the LHC parameters, takes into account the space charge efiect and predicts an equilibrium density of the electrons. Based on this model, we flnd the electron lifetime and estimate the energy deposition of the electron cloud to the wall. We also estimate the emittance growth of the beam due to random ∞uctuations of the electric fleld of the cloud and flnd the growth rate of the beam instability caused by the electrons.

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