Katherine Harkay
(Argonne National Laboratory)
10/11/10, 9:00 AM
Oral Sessions
The APS Upgrade calls for the development and commissioning of a superconducting undulator (SCU) at the Advanced Photon Source (APS), a 7-GeV electron synchrotron. Operation of an SCU at ANKA, also an electron ring, suggests that electron multipacting may in part be responsible for the observed heat load and pressure rise, but this effect is not predicted by an electron cloud generation code....
Ms
Laura Boon
(Purdue University)
10/11/10, 9:30 AM
Oral Sessions
Electron cloud data from electron rings suggest that the photoelectron model in electron cloud generation codes is incomplete. The photoelectron model will be important in modeling the cloud generation on components downstream of wigglers, which can produce a very high photon flux on the wall in a local region. The code SYNRAD3D has been developed in the context of the Bmad accelerator physics...
Ms
Christine Celata
(LBNL / Cornell University)
10/11/10, 10:00 AM
Oral Sessions
Simulations of electron cloud buildup in the CESR-TA wigglers have been performed using the 3D code WARP-POSINST. The beam field is modeled using the Bassetti-Erskine electric field and does not evolve in time. The electron cloud distribution during the passage of a 45-bunch train has been examined with particular attention to the difference in dynamics at the z locations of the maximum and...
Dr
Theo Demma
(INFN)
10/11/10, 11:00 AM
Paul L. G. Lebrun
(Fermilab)
10/11/10, 11:30 AM
Oral Sessions
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...
Dr
Seth Veitzer
(Tech-X Corporation)
10/11/10, 12:00 PM
Oral Sessions
We present an overview of recent electron cloud modeling results using the multi-dimensional, parallel, plasma simulation code VORPAL. We have used VORPAL to model cloud buildup in dipole, quadrupole, and field-free magnetic field configurations, in both circular and elliptical cross section pipes relevant to microwave diagnostics at the PEP-II experiment at SLAC, and ongoing experiments in...
