| Paper |
Title |
Page |
| TUPLS003 |
A Perfect Electrode to Suppress Secondary Electrons inside the Magnets
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1489 |
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- L. Wang, M.T.F. Pivi
SLAC, Menlo Park, California
- H. Fukuma, S.-I. Kurokawa
KEK, Ibaraki
- G.X. Xia
DESY, Hamburg
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Electron cloud due to multipacting in the positron ring of B-factories is one of the limitations on the machine performance. Electron cloud in the drift region can be suppressed by solenoid. However, solenoid doesn't work inside a magnet. Numerical studies show that there is strong multipacting in the dipole magnet of the B-factory positron ring. Electrons also can be trapped inside quadrupole and sextupole magnets. The electron cloud from the dipole magnet and wiggler in the positron damping ring of the ILC is a critical limitation on the choice of damping ring circumference, which directly results in a choice of two 6km rings as the baseline for the positron damping ring. Various electrodes have been studied using the program CLOUDLAND. Our studies show that a wire type of electrode with a few hundred voltages works perfectly to kill the secondary electrons inside various magnets.
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| THPCH049 |
Simulation Study of Transverse Coupled-bunch Instabilities due to Electron Cloud in KEKB LER
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2895 |
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- X.W. Dong, S.-I. Kurokawa, K. Ohmi
KEK, Ibaraki
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In this paper we report simulation results on the transverse coupled-bunch instabilities (TCBI) due to electron cloud at the KEKB Low Energy Ring (LER). The formation of electron cloud and related TCBI is investigated based on realistic solenoid field model. Studies on electron cloud in Quadrupole which could induce TCBI are also presented in this paper.
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