Paper | Title | Page |
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TUOCB1 | Progress in the Design of Beam Optics for FCC-ee Collider Ring* | 1281 |
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The beam optics for the FCC-ee collider has been updated: (a) the layout is adjusted to a new footprint of FCC-hh, (b) the design around the interaction point is refined considering a number of machine-detecor interface issues, (c) the arc lattice is refined taking realistic magnet designs into account, (d) the β* and betatron tunes are re-optimized according to recent results of the beam-beam simulations, and more. These changes make the collider design more realistic without performance degradation. | ||
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Slides TUOCB1 [4.891 MB] | |
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUOCB1 | |
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TUPVA004 | Synchrotron Radiation Backgrounds for the FCC-hh Experiments | 2031 |
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Funding: This work was supported by the HORIZON 2020 project EuroCirCol, grant agreement 654305. We present in this paper a detailed analysis of the synchrotron radiation emitted by the 50 TeV protons of the FCC-hh in the last bending and quadrupole magnets upstream the interaction region. We discuss the characteristics of this radiation in terms of power, flux, photon spectrum and fans in different running conditions such as, for example, with and without crossing angle. We mainly focus our study on the fraction of photons that may hit the detector, with a full tracking into GEANT4 that simulates their interaction within the central beam pipe. |
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DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPVA004 | |
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TUPVA040 | Overview of Design Development of FCC-hh Experimental Interaction Regions | 2151 |
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The experimental interaction region is one of the key areas that define the performance of the Future Circular Collider. In this overview we will describe the status and the evolution of the design of EIR of FCC-hh, focusing on design of the optics, energy deposition in EIR elements, beam-beam effects and machine detector interface issues. | ||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPVA040 | |
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WEOBA3 | Studies of a Scheme for Low Emittance Muon Beam Production From Positrons on Target | 2486 |
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We are studying a new scheme to produce very low emittance muon beams using a positron beam of about 45 GeV interacting on electrons on target. This is a challenging and innovative scheme that needs a full design study. One of the innovative topics to be investigated is the behaviour of the positron beam stored in a low emittance ring with a thin target, that is directly inserted in the ring chamber to produce muons. Muons will be immediately collected at the exit of the target and transported to two mu+ and mu- accumulator rings. We focus in this paper on the simulation of the e+ beam interacting with the target, its degradation in the 6-D phase space and the optimization of the e+ ring design mainly to maximize the energy acceptance. We will investigate the performances of this scheme, ring optics plus target system, comparing different multi-turn simulations. | ||
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Slides WEOBA3 [3.737 MB] | |
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEOBA3 | |
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WEPIK004 | Luminosity- and Beam- Induced Backgrounds for the FCC-ee Interaction Region Design | 2914 |
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A preliminary study on machine induced backgrounds has been performed for the proposed FCC-ee interaction region (IR) and proto-detector. Synchrotron radiation has the strongest impact on the present design of the IR and both radiation from dipoles and quadrupoles have been taken into account. The effect of luminosity backgrounds like gamma gamma to hadrons and pair production have also been studied. The impact of background particles on the detector occupancy has also been studied in full simulation. | ||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPIK004 | |
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WEPIK034 | Progress in the FCC-ee Interaction Region Magnet Design | 3003 |
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The design of the region close to the interaction point of the FCC-ee experiments is especially challenging. The beams collide at an angle (±15mrad) in a region where the detector solenoid magnetic field is large. Moreover, the very low vertical β* of the machine necessitates that the final focusing quadrupoles are also inside this high field region. The beams should be screened from the effect of the detector solenoid field, and the emittance blow-up due to vertical dispersion in the interaction region should be minimized while leaving enough space for detector components. Crosstalk between the two final focus quadrupoles, only about 6 cm apart at the tip, should also be minimized. We present an update on the subject. | ||
DOI • | reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPIK034 | |
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