Author: Livezey, J.A.
Paper Title Page
MOPS083 Update on Electron Cloud Mitigation Studies at Cesr-TA* 796
 
  • J.R. Calvey, M.G. Billing, J.V. Conway, G. Dugan, S. Greenwald, Y. Li, X. Liu, J.A. Livezey, J. Makita, R.E. Meller, M.A. Palmer, S. Santos, R.M. Schwartz, J.P. Sikora, C.R. Strohman
    CLASSE, Ithaca, New York, USA
  • S. Calatroni, G. Rumolo
    CERN, Geneva, Switzerland
  • K. Kanazawa, Y. Suetsugu
    KEK, Ibaraki, Japan
  • M.T.F. Pivi, L. Wang
    SLAC, Menlo Park, California, USA
  
  Funding: Work supported by the US National Science Foundation (PHY-0734867) and Department of Energy (DE-FC02-08ER41538)
Over the course of the past three years, the Cor­nell Elec­tron Stor­age Ring (CESR) has been re­con­fig­ured to serve as a test fa­cil­i­ty for next gen­er­a­tion par­ti­cle ac­cel­er­a­tors. A sig­nif­i­cant part of this pro­gram has been the in­stal­la­tion of sev­er­al di­ag­nos­tic de­vices to mea­sure and quan­ti­fy the elec­tron cloud ef­fect, a po­ten­tial lim­it­ing fac­tor in these ma­chines. In par­tic­u­lar, more than 30 Re­tard­ing Field An­a­lyz­ers (RFAs) have been in­stalled in CESR. These de­vices mea­sure the local elec­tron cloud den­si­ty and en­er­gy dis­tri­bu­tion, and can be used to eval­u­ate the ef­fi­ca­cy of dif­fer­ent cloud mit­i­ga­tion tech­niques. This paper will pro­vide an overview of RFA re­sults ob­tained at Ces­r­TA over the past year, in­clud­ing mea­sure­ments taken as func­tion of bunch spac­ing and wig­gler mag­net­ic field. Un­der­stand­ing these re­sults pro­vides a great deal of in­sight into the be­hav­ior of the elec­tron cloud.