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Sixth-Order Resonance of High-Intensity Linear Accelerators

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Title
Sixth-Order Resonance of High-Intensity Linear Accelerators
Author(s)
Dong-O Jeon; Hwang K.R.; Ji-Ho Jang; Hyungchang Jin; Hyojae Jang
Publication Date
2015-05
Journal
PHYSICAL REVIEW LETTERS, v.114, no.18, pp.184802 -
Publisher
AMER PHYSICAL SOC
Abstract
It is shown that the sixth-order 6σ = 720° (or 6 : 2) resonance is manifested for high-intensity beams of linear accelerators through the space charge potential when the depressed phase advance per cell σ is close to and below 120° but no resonance effect is observed for σ above 120°. Simulation studies show a clear emittance growth by this resonance and a characteristic sixfold resonance structure in phase space. To verify that this is a resonance, a frequency analysis was conducted and a study was performed of crossing the resonance from above and from below the resonance. Canonical perturbation is carried out to show that this resonance arises through perturbation of strong 2σ = 360° (2 : 1) and 4σ = 360° (4:1) space charge resonances. Simulations also show that the space charge 6σ = 360° (or 6 : 1) resonance is very weak. © 2015 American Physical Society
URI
http://pr.ibs.re.kr/handle/8788114/2933
DOI
10.1103/PhysRevLett.114.184802
ISSN
0031-9007
Appears in Collections:
HiddenCommunity > Journal Papers
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