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TY - CONF
AU - Rao, Y.-N.
AU - Baartman, R.A.
AU - Planche, T.
ED - Koscielniak, Shane
ED - Satogata, Todd
ED - Schaa, Volker RW
ED - Thomson, Jana
TI - Correction of ν_{r}-ν_{z}=1 Resonance in TRIUMF Cyclotron
J2 - Proc. of IPAC2018, Vancouver, BC, Canada, April 29-May 4, 2018
C1 - Vancouver, BC, Canada
T2 - International Particle Accelerator Conference
T3 - 9
LA - english
AB - 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.
PB - JACoW Publishing
CP - Geneva, Switzerland
SP - 3492
EP - 3495
KW - resonance
KW - coupling
KW - cyclotron
KW - TRIUMF
KW - simulation
DA - 2018/06
PY - 2018
SN - 978-3-95450-184-7
DO - 10.18429/JACoW-IPAC2018-THPAK110
UR - http://jacow.org/ipac2018/papers/thpak110.pdf
ER -