| Title |
Correction of ν_{r}-ν_{z}=1 Resonance in TRIUMF Cyclotron |
| Authors |
- Y.-N. Rao, R.A. Baartman, T. Planche
TRIUMF, Vancouver, Canada
|
| Abstract |
The second order linear coupling resonance nu_{r}-nu_{z}=1 is driven by an asymmetry in the median plane of the cyclotron due to presence of the first harmonic in B_{r} component. In TRIUMF cyclotron, this resonance is encountered at about 166 MeV and 291 MeV, where nu_{r}=1.2 and nu_{z}=0.2. When the beam is off-centered radially to pass through this resonance, the radial oscillation gets converted into vertical oscillation, which can cause beam loss to occur, though these loss modes do not reduce the machine transmission under normal operation. In this paper, we present the results of simulations and measurements that we have performed to correct this resonance by using the existing harmonic coils.
|
| Funding |
TRIUMF receives federal funding via a contribution agreement through the National Research Council of Canada |
| Paper |
download THPAK110.PDF [0.670 MB / 4 pages] |
| Export |
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※ EndNote |
| Conference |
IPAC2018, Vancouver, BC, Canada |
| Series |
International Particle Accelerator Conference (9th) |
| Proceedings |
Link to full IPAC2018 Proccedings |
| Session |
MC5 Poster Session |
| Date |
03-May-18 09:00–12:00 |
| Main Classification |
05 Beam Dynamics and EM Fields |
| Sub Classification |
D04 Beam Coupling Impedance - Theory, Simulations, Measurements, Code Developments |
| Keywords |
resonance, coupling, cyclotron, TRIUMF, simulation |
| Publisher |
JACoW Publishing, Geneva, Switzerland |
| Editors |
Shane Koscielniak (TRIUMF, Vancouver, BC, Canada); Todd Satogata (JLab, Newport News, VA, USA); Volker RW Schaa (GSI, Darmstadt, Germany); Jana Thomson (TRIUMF, Vancouver, BC, Canada) |
| ISBN |
978-3-95450-184-7 |
| Published |
June 2018 |
| Copyright |
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