EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH European Laboratory for Particle Physics Large Hadron Collider Project LHC Project Report 141 Photoelectrons and Multipacting in the LHC: Electron Cloud Build-up
نویسنده
چکیده
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 effect and predicts an equilibrium density of the electrons. Based on this model, we find 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 fluctuations of the electric field of the cloud and find the growth rate of the beam instability caused by the electrons. ∗Address: Stanford Linear Accelerator Center, Stanford University, CA 94309 USA †Member of the collaboration to the LHC project. Administrative Secretariat LHC Division CERN CH-1211 Geneva 23 Switzerland Geneva, October 1997
منابع مشابه
EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH European Laboratory for Particle Physics THE LARGE HADRON COLLIDER, A MEGASCIENCE PROJECT
The Large Hadron Collider (LHC) will be the next particle accelerator built to serve the world's high-energy physics community at CERN, the European Organisation for Nuclear Research. Reusing the 26.7-km circumference tunnel and infrastructure of the existing LEP collider, the LHC will make use of advanced technology high-field superconducting magnets operated in superfluid helium to push the e...
متن کاملEUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH European Laboratory for Particle Physics Large Hadron Collider Project LHC Project Report ??? Fast Symplectic Map Tracking for the LHC
Tracking simulations remain the essential tool for evaluating how multipolar imperfections in ring magnets restrict the domain of stable phase-space motion. In the LHC, particles circulate at the injection energy, when multipole errors are most significant, for more than 10 million turns, but systematic tracking studies are limited to a small fraction of this total time—even on modern computers...
متن کاملEUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH European Laboratory for Particle Physics Large Hadron Collider Project LHC Project Report 16 Transverse Instabilities in the LHC
I first summarize the impedance model that I will be using (this is compiled from the work of several other authors). I then use the methods described elsewhere [1] to determine mode coupling thresholds and growth rates of multibunch modes, including the effects of multibunch mode coupling (see [1]). The effects of feedback are also considered.
متن کاملEUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH CERN-SL-2000-064 AP CERN-NUFACT-Note-056 Electron Cloud at the CERN Muon Storage Ring
Computer simulations for the CERN muon storage ring confirm the absence of beam-induced multipacting. Thus electron-cloud build up along the bunch train is not expected to be a problem. Geneva, Switzerland December 18, 2000 We first describe a few basic considerations on electron-cloud build up, scaling from the LHC, and then report simulation results. Table 1 lists relevant parameters for the ...
متن کاملEUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH CERN-SL-Note-2000-064 AP CERN-NUFACT-Note-056 Electron Cloud at the CERN Muon Storage Ring
Computer simulations for the CERN muon storage ring confirm the absence of beam-induced multipacting. Thus electron-cloud build up along the bunch train is not expected to be a problem. Geneva, Switzerland January 5, 2001 We first describe a few basic considerations on electron-cloud build up, scaling from the LHC, and then report simulation results. Table 1 lists relevant parameters for the CE...
متن کامل