Speaker
Paul L. G. Lebrun
(Fermilab)
Description
We present results from a precision simulation of the electron cloud (EC) problem in the Fermilab Main Injector using the code VORPAL. Fully3d and self consistent that include both distributions of electrons in6D phase-space and E.M. field maps. Various configurations of themagnetic fields found around the machine have been studied. Plasma waves associated to the fluctuation density of the cloud have been analyzed. Our results are compaired with those obtained with the POSINST code. It is shown that the 3D effects are important. Theresponse of a Retarding Field Analyzer (RFA) to the EC has been simulated, as well as the more challenging microwave absorptionexperiment. Definite predictions of their exact response aredifficult to compute, mostly because of the uncertainties in thesecondary emission yield and, in the case of the RFA, because of thesensitivity of the electron collection efficiency to unknown straymagnetic fields. Nonetheless, our simulations do ! provide guidance to the experimental program.
Primary author
Paul L. G. Lebrun
(Fermilab)
Co-authors
Prof.
John CARY
(Tech-X, Univ of Boulder Co)
Dr
Panagiotis Spentzouris
(Fermilab)
Dr
Peter Stoltz
(Tech-X Corporation)
Dr
Seth A. Veitzer
(Tech-X Corporation)
