Author/Authors :
P. Pivi، نويسنده , , M.T.F. and Ng، نويسنده , , J.S.T. and Cooper، نويسنده , , F. and Kharakh، نويسنده , , D. and King، نويسنده , , Matthew F. and Kirby، نويسنده , , R.E. and Kuekan، نويسنده , , B. and Spencer، نويسنده , , C.M. and Raubenheimer، نويسنده , , T.O. and Wang، نويسنده , , L.F.، نويسنده ,
Abstract :
The first experimental observation of magnetic resonances in electron clouds is reported. The resonance was observed as a modulation in cloud intensity for uncoated as well as TiN-coated aluminum surfaces in the positron storage ring of the PEP-II collider at SLAC. Electron clouds frequently arise in accelerators of positively charged particles, and severely impact the machines’ performance. The TiN coating was found to be an effective remedy, reducing the cloud intensity by three orders of magnitude.
Keywords :
Electron cloud instability , Secondary emission , Positron storage rings , Electron analyzer
