Simulations of Electron-Cloud Current Density Measurements in Dipoles, Drifts, and Wigglers at CesrTA

Conference · Fri May 01 00:00:00 EDT 2009

OSTI ID:974155

Calvey, J; Crittenden, J A; Dugan, G; Greenwald, S; Kreinick, D; Livezey, J A; Palmer, M A; Rubin, D; Fukuma, H; Jain, P; Kanazawa, K; Suetsugu, Y; Celata, C M; Furman, M; Penn, G; Venturini, M; Pivi, M T.F.; Harkay, K C; Wang, L

A core component of the Cesr-TA research program at Cornell is to fully understand the electron cloud effect through the use of simulation programs that have been developed to predict the growth of the cloud and its interaction with the beam. As a local probe of the electron cloud, several segmented retarding field analyzers (RFAs) have been installed in CesrTA in dipole, drift and wiggler regions. Using these RFAs, the energy spectrum of the time-average electron cloud current density striking the walls has been measured for a variety of bunch train patterns, with different bunch currents, beam energies, emittances, and bunch lengths, and for both positron and electron beams. This paper will compare these measurements with the predictions of simulation programs.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: Accelerator& Fusion Research Division
• DOE Contract Number: DE-AC02-05CH11231
• OSTI ID: 974155
• Report Number(s): LBNL-2664E; TRN: US1002257
• Resource Relation: Conference: PAC '09
• Country of Publication: United States
• Language: English

Related Subjects

43
CLOUDS
CURRENT DENSITY
DIPOLES
ELECTRON BEAMS
ELECTRONS
POSITRONS
PROBES
RESEARCH PROGRAMS
SIMULATION