Longitudinal injection scheme using short pulse kicker for small aperture electron storage rings
Abstract
Future light sources aim at achieving a diffraction limited photon beam both in the horizontal and vertical planes. High gradient quadrupoles and strong chromaticity correction sextupoles in a corresponding ultra-low emittance ring may restrict the physical and dynamic aperture of the storage ring such that off-axis injection and accumulation may become impossible. We propose a longitudinal injection scheme, i.e., injecting an electron bunch onto the closed orbit with a time offset with respect to the circulating bunches. The temporal separation enables a pulsed dipole kicker to situate the injected bunch transversely on-axis without disturbing the circulating bunches if the pulse length is shorter than the bunch spacing. The injected bunch is finally merged to a circulating bunch through synchrotron radiation damping. We present the scheme in detail and its application to the lattice of the MAX IV 3 GeV storage ring. The requirements and feasibility of the pulsed dipole kicker are also discussed. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000099828Publication status
publishedExternal links
Journal / series
Physical Review. Special Topics. Accelerators and BeamsVolume
Pages / Article No.
Publisher
American Physical SocietyMore
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