| Paper | Title | Other Keywords | Page |
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| MOYAA01 | Several Topics on Beam Dynamics in FCC-ee | sextupole, emittance, quadrupole, alignment | 18 |
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Funding: Work supported by the European Commission under Capacities 7th Framework Programme project EuCARD–2, grant agreement 312453, and the Horizon 2020 Programme project CREMLIN, grant agreement 654166. Several studies on the beam dynamics at FCC-ee: low emittance tuning, dynamic aperture, beam blowup with/without beam beam, will be introduced. |
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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2018-MOYAA01 | ||
| About • | paper received ※ 23 September 2018 paper accepted ※ 19 February 2019 issue date ※ 21 April 2019 | ||
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| TUOBB02 | Off-momentum Optics at SuperKEKB | sextupole, coupling, lattice, optics | 71 |
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| The nano-beam scheme can squeeze the vertical beta function at the IP much smaller than the bunch length. It implies that the large chromaticity is generated in the vicinity of the final focus quadrupole magnets and the strong sextupoles are adopted to correct the chromaticity, for instance the local chromaticity corrections. While understanding of the off-momentum optics is important to optimize the dynamic aperture to make Touschek lifetime long and to reduce the luminosity degradation due to chromatic behaviors. In general, there is a discrepancy between measurements and those obtained from the optics model. The chromatic phase-advance is introduced to measure the off-momentum optics and correct by using sextupole magnets. | |||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2018-TUOBB02 | ||
| About • | paper received ※ 12 October 2018 paper accepted ※ 19 February 2019 issue date ※ 21 April 2019 | ||
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| TUYBA04 | Some Issues on Beam-beam Interaction at CEPC | impedance, luminosity, simulation, factory | 116 |
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Funding: Project 11775238 supported by NSFC In this paper, the beam-beam study in CEPC CDR is briefly introduced. Some issues related with beam-beam interaction will be emphasized. The bunch lengthening due to impedance and beamstrahlung is simulated in a more self-consistent method. It is found that there exist very narrow stable working point space at W-mode during the CDR design study. We’ll show wider tune scan result. It is found that there exist some disagreement between dynamic aperture and beam lifetime. We try to define the so-called diffusion rate map to explain the cause. Some initial result for different lattice solution is shown. |
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| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2018-TUYBA04 | ||
| About • | paper received ※ 26 September 2018 paper accepted ※ 19 February 2019 issue date ※ 21 April 2019 | ||
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| TUPAB05 | An On-axis Injection Design for CEPC | injection, booster, collider, damping | 143 |
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| Considering the requirement on the dynamic aperture in the main collider, an on-axis injection method is need-ed for the Higgs energy at CEPC. A swap-out on-axis injection scheme using the booster as an accumulation ring is given in this paper. Some dynamical problems concerning the effectiveness of this injection scheme is also discussed. | |||
| DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-eeFACT2018-TUPAB05 | ||
| About • | paper received ※ 27 September 2018 paper accepted ※ 19 February 2019 issue date ※ 21 April 2019 | ||
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