Electron-cloud Effect - Proposed Remedies

Proposed Remedies

A few remedies have been proposed to deal with this, such as putting ridges in the accelerator tube, adding antechambers to the tube, coating the tube to reduce the yield of electrons from the surface, or creating an electric field to pull in stray electrons. At the PEP-II accelerator at SLAC, the vacuum pipe which contains the positron ring has a wire coiled around its entire length. Running a current through this wire creates a solenoidal magnetic field which tends to contain the electrons liberated from the beam pipe walls.

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