Theory of emittance exchange through coupling resonance crossing
نویسندگان
چکیده
منابع مشابه
Aberration corrected emittance exchange
The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Full exploitation of emittance exchange (EEX) requires aberration-free performance of a complex imaging system including active radio-frequency (rf) elements which can add temporal distortions. We investigate the performance of an EEX line where the exchange occurs between two ...
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Alternative chicane-type beam lines are proposed for exact emittance exchange between horizontal phase space (x, x′) and longitudinal phase space (z, δ). Methods to achieve exact phase space exchanges, i.e. mapping x to z, x′ to δ, z to x and δ to x′ are suggested. Methods to mitigate the thick-lens effect of the transverse cavity on emittance exchange are discussed. Some applications of the ph...
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A scheme is proposed to exchange the transverse and longitudinal emittances of an electron bunch. A general analysis is presented and a specific beamline is used as an example where the emittance exchange is achieved by placing a transverse deflecting mode radio-frequency cavity in a magnetic chicane. In addition to reducing the transverse emittance, the bunch length is also simultaneously comp...
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In most cases beam is injected into electron storage rings in the horizontal plane and off-axis. The larger the horizontal emittance of the injected beam the larger the acceptance of the ring has to be. The injected beam is usually delivered by a synchrotron. In case the vertical acceptance of the ring is sufficiently large one can take advantage of the small vertical emittance reached in well ...
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The third-integer coupling resonance at ν(x)-2ν(z)=ℓ, known as the Walkinshaw resonance, is important in high-power accelerators. We find that, when the betatron tunes ramp through a Walkinshaw resonance the fractional emittance growth (FEG) is a universal function of the effective resonance strength: G(1,-2,ℓ)√[ε(xi)]|Δ(ν(x)-2ν(z))/Δn|(-1/2), where G(1,-2,ℓ) is the resonance strength; ε(xi) an...
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ژورنال
عنوان ژورنال: Physical Review Accelerators and Beams
سال: 2020
ISSN: 2469-9888
DOI: 10.1103/physrevaccelbeams.23.044003