| Title |
Probablistic Estimation of Low Energy Electron Trapping in Quadrupoles |
| Authors |
- K.G. Sonnad
KEK, Ibaraki, Japan
- J.A. Crittendenpresenter, K.G. Sonnad
Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
|
| Abstract |
Electron cloud formation in quadrupoles is important for storage rings because they have the potential of being trapped for a time period that exceeds the revolution period of the beam. This can result in a turn by turn build up of cloud, that could potentially interfere with beam motion. The mechanism of electron trapping can be understood based on dynamics associated with the motion of an isolated charged particle in a magnetic field. In such a system, energy is conserved and so is the magnetic moment of the gyrating electron which is an adiabatic invariant. This leads to determination of a so called loss cone in velocity space. Using these principles we describe a method to estimate the probability distribution of trapping across the cross-section of a quadrupole for a given field gradient and electron energy. Such an estimate can serve as a precursor to more detailed numerical studies of electron cloud build and trapping in quadrupoles.
|
| Paper |
download THPOA07.PDF [1.975 MB / 3 pages] |
| Export |
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| Conference |
NAPAC2016, Chicago, IL, USA |
| Series |
North American Particle Accelerator Conference (3rd) |
| Proceedings |
Link to full NAPAC2016 Proccedings |
| Session |
Poster Session (MC2 & MC5) |
| Date |
13-Oct-16 08:30–12:30 |
| Main Classification |
5: Beam Dynamics and EM Fields |
| Sub Classification |
D03 - Calculations of EM fields - Theory and Code Developments |
| Keywords |
ion, electron, quadrupole, storage-ring, simulation |
| Publisher |
JACoW, Geneva, Switzerland |
| Editors |
Volker RW Schaa (GSI, Darmstadt, Germany); Maria Power (ANL, Argonne, IL, USA); Vladimir Shiltsev (FNAL, Batavia, IL, USA); Marion White (ANL, Argonne, IL, USA) |
| ISBN |
978-3-95450-180-9 |
| Published |
January 2017 |
| Copyright |
|
