3-10 August 2016
Chicago IL USA
US/Central timezone
There is a live webcast for this event.

Electron cloud trapping in combined function dipole magnets

6 Aug 2016, 18:00
Riverwalk A/B ()

Riverwalk A/B

Poster Accelerator: Physics, Performance, R&D and Future Accelerator Facilities Poster Session


Sergey Antipov (University of Chicago)


Electron cloud can lead to a fast instability in intense proton and positron beams in circular accelerators. We demonstrate that electron cloud can be trapped in a combined function magnet. We present the results of analytical estimates, and compare them to numerical simulations of electron cloud formation. In a combined function magnet the electron cloud is located at the beam center and the ratio of trapped particles can be as high as 1%. Since the process of electron cloud build-up is exponential, once trapped this amount of electrons significantly decreases the time of build-up on the next revolution. The trapping creates a mechanism for the beam to act on itself on the next turn and can lead to a head-tail instability.

Primary author

Sergey Antipov (University of Chicago)

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