| Paper | Title | Page |
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TUXAT0102 |
Investigation of Arc Region Lattice for the Compatible Modes of CEPC Collider Ring | |
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| The FODO cell structure is chosen to provide a large filling factor of dipoles for the arc region of a circular Higgs factory. For the Higgs and ttbar modes of CEPC collider, the phase advances of each arc cell are 90/90 degrees; For the Z mode, the phase advance was reduced to 60/60 degrees in order to suppress the microwave and transverse mode coupling instability and to increase stable tune area when considering both the beam-beam effect and longitudinal impedance. For the W mode, the phase advance was reduced as Z to increase the stable tune area. Due to the different cell phase advances of Higgs/ttbar and Z/W modes, the sextupole pairs with ’I transportation matrix are no more maintain. Thus, compatible sextupole layout for the should be provide for the Higgs/ttbar and Z/W modes. Two schemes of the arc sextupole layout are investigated for the CEPC collider arc region. One has a period of 5 cells for Higgs/ttbar modes and 7 cells for Z/W modes, which is proposed by FCC-ee. Another one has a period of 11 cells or 23 cells for all the modes. From the view point of single beam dynamics and cost of the sextupole, the two schemes will be investigated and compared. | ||
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Slides TUXAT0102 [3.515 MB] | |
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| TUZAT0201 | MDI Design for CEPC | 77 |
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| The Circular Electron Positron Collider (CEPC) is a proposed Higgs factory with center of mass energy of 240 GeV to measure the properties of Higgs boson and test the standard model accurately. Machine Detector Interface (MDI) is the key research area in electron-positron colliders, especially in CEPC, it is one of the criteria to measure the accelerator and detector design performance. In this paper, we will introduce the CEPC MDI layout and (Interaction Region) IR design, IR beam pipe design, thermal analysis and injection background etc on, which are the most critical physics problem. | ||
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Slides TUZAT0201 [3.490 MB] | |
| DOI • | reference for this paper ※ doi:10.18429/JACoW-eeFACT2022-TUZAT0201 | |
| About • | Received ※ 28 November 2022 — Revised ※ 02 February 2023 — Accepted ※ 07 February 2023 — Issue date ※ 09 February 2023 | |
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| TUZAS0101 | Longitudinally Polarized Colliding Beams at the CEPC | 97 |
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Funding: NSFC Grant No. 11975252; National Key Program for S&T R&D Grant No. 2016YFA0400400 and 2018YFA0404300; Key Research Program of Frontier Sciences, CAS Grant No. QYZDJ-SSW-SLH004; YIPA CAS No. 2021012. This paper reports the recent progress in the design studies of longitudinally polarized colliding beams for CEPC. The overall design concept is outlined, followed by more detailed descriptions of the polarized beam generation, polarization maintenance in the booster, and spin rotators in the collider rings. |
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Slides TUZAS0101 [7.310 MB] | |
| DOI • | reference for this paper ※ doi:10.18429/JACoW-eeFACT2022-TUZAS0101 | |
| About • | Received ※ 30 November 2022 — Revised ※ 06 February 2023 — Accepted ※ 08 February 2023 — Issue date ※ 15 February 2023 | |
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