Six-dimensional tracking results in an ultra-low emittance electron ring

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A dynamic aperture study with six-dimensional tracking on ultra-low emittance damping ring lattice is presented. A 1989 particle accelerator conference paper explained how the fast damping rate, the low emittance and the large dynamic aperture are achieved for this lattice using strong wigglers, a large circumference, many FODO cells, and non-interleaved sextupole pairs of vanishing second-order geometric aberration terms. In that report and another that followed, a dynamic aperture improvement with octupole correction to correct part of the third-order geometric aberrations was also reported. However, only the transverse phase space coordinates were used in particle tracking, which may be insufficient ... continued below

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Pages: (15 p)

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Emery, L. January 1, 1992.

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A dynamic aperture study with six-dimensional tracking on ultra-low emittance damping ring lattice is presented. A 1989 particle accelerator conference paper explained how the fast damping rate, the low emittance and the large dynamic aperture are achieved for this lattice using strong wigglers, a large circumference, many FODO cells, and non-interleaved sextupole pairs of vanishing second-order geometric aberration terms. In that report and another that followed, a dynamic aperture improvement with octupole correction to correct part of the third-order geometric aberrations was also reported. However, only the transverse phase space coordinates were used in particle tracking, which may be insufficient under some circumstances. Since this ring has a low momentum compaction factor {alpha}{sub c}, the second-order effect of betatron oscillations on the path length becomes as significant as the effect of the momentum deviation. This coupling between transverse motion and longitudinal motion may reduce the calculated dynamic aperture for particles with no initial momentum deviation. For the damping ring presented here, the calculated dynamic aperture in six-dimensional phase space is reduced significantly from that calculated with transverse phase space coordinates only. Nevertheless, the dynamic aperture achieved with non-interleaved sextupole pairs remains much larger than of other possible sextupole configurations.

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Pages: (15 p)

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OSTI; NTIS; INIS; GPO Dep.

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  • 4. generation light sources workshop, Stanford, CA (United States), 24-27 Feb 1992

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  • Other: DE92015189
  • Report No.: ANL/CP-76124
  • Report No.: CONF-9202111--3
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 5256198
  • Archival Resource Key: ark:/67531/metadc1068886

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  • January 1, 1992

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  • Feb. 4, 2018, 10:51 a.m.

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  • April 17, 2018, 3:35 p.m.

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Emery, L. Six-dimensional tracking results in an ultra-low emittance electron ring, article, January 1, 1992; Illinois. (digital.library.unt.edu/ark:/67531/metadc1068886/: accessed September 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.