The Three Dipole Kicker Injection Scheme for the ALS-U Accumulator Ring

Ehrlichman, Michael; Hellert, Thorsten; Leemann, Simon; Penn, Gregory; Steier, Christoph; Sun, Changchun; Venturini, Marco; Wang, Dan

doi:10.18429/JACoW-IPAC2021-WEPAB124

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BiBTeX citation export for WEPAB124: The Three Dipole Kicker Injection Scheme for the ALS-U Accumulator Ring

@inproceedings{ehrlichman:ipac2021-wepab124,
  author       = {M.P. Ehrlichman and T. Hellert and S.C. Leemann and G. Penn and C. Steier and C. Sun and M. Venturini and D. Wang},
% author       = {M.P. Ehrlichman and T. Hellert and S.C. Leemann and G. Penn and C. Steier and C. Sun and others},
% author       = {M.P. Ehrlichman and others},
  title        = {{The Three Dipole Kicker Injection Scheme for the ALS-U Accumulator Ring}},
  booktitle    = {Proc. IPAC'21},
  pages        = {2896--2899},
  eid          = {WEPAB124},
  language     = {english},
  keywords     = {injection, kicker, septum, storage-ring, booster},
  venue        = {Campinas, SP, Brazil},
  series       = {International Particle Accelerator Conference},
  number       = {12},
  publisher    = {JACoW Publishing, Geneva, Switzerland},
  month        = {08},
  year         = {2021},
  issn         = {2673-5490},
  isbn         = {978-3-95450-214-1},
  doi          = {10.18429/JACoW-IPAC2021-WEPAB124},
  url          = {https://jacow.org/ipac2021/papers/wepab124.pdf},
  note         = {https://doi.org/10.18429/JACoW-IPAC2021-WEPAB124},
  abstract     = {{The ALS-U light source will implement on-axis swap-out injection of individual trains employing an accumulator between the booster and storage rings. The accumulator ring design is a twelve period triple-bend achromat that will be installed along the inner circumference of the storage-ring tunnel. A non-conventional injection scheme will be utilized for top-off off-axis injection from the booster into the accumulator ring meant to accommodate a relatively narrow vacuum-chamber aperture while maximizing injection efficiency. The scheme incorporates three dipole kickers distributed over three sectors, with two kickers perturbing the stored beam and the third affecting both the stored and the injected beam trajectories. This paper describes this ‘‘3DK’’ injection scheme, how it was chosen, designed and optimized, and how we evaluated its fitness as a solution for booster-to-accumulator ring injection against alternate injection schemes.}},
}