Keyword: interaction-region
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MOPAB053 Electron Bunch Streaking With Single-Cycle THz Radiation Using an NSOM-Style TIP electron, simulation, laser, diagnostics 219
 
  • F. Lemery, A.F. Hartin
    University of Hamburg, Hamburg, Germany
  • D. Zhang
    DESY, Hamburg, Germany
  • D. Zhang
    CFEL, Hamburg, Germany
  
  THz wavelengths provide an excellent scale for electron-bunch acceleration and manipulation. The improvement of laser-based THz-generation efficiencies to ~1% provides a good opportunity for e.g. phase-space manipulation and diagnostics. We describe a simple technique to streak and characterize electron beams. We provide full simulation results and discuss the scaling of this technique to various regimes.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB053  
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TUPVA036 Cross-Talk Studies between FCC-hh Experimental Interaction Regions detector, proton, collider, simulation 2136
 
  • J.L. Abelleira, A. Seryi
    JAI, Oxford, United Kingdom
  • R.B. Appleby, H. Rafique
    UMAN, Manchester, United Kingdom
  • M.I. Besana
    CERN, Geneva, Switzerland
  
  Funding: The European Circular Energy-Frontier Collider Study (EuroCirCol), EU's Horizon 2020 grant No 654305.
Debris from 50 TeV proton-proton collisions at the main interaction point in the FCC-hh may contribute to the background in the subsequent detector. This cross-talk is of possible concern for the FCC-hh due to the high luminosity and energy of the collider. DPMJET-III is used as a collision debris generator in order to assess the muon cross-talk contribution. An analytical calculation of muon range in rock is performed. This is followed by a full Monte Carlo simulation using FLUKA, where the accelerator tunnel has been modelled. The muon cross talk between the adjacent interaction points is assessed and its implications for FCC-hh design are discussed. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPVA036  
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TUPVA038 Non Linear Field Correction Effects on the Dynamic Aperture of the FCC-hh quadrupole, lattice, collider, dynamic-aperture 2143
 
  • E. Cruz Alaniz, A. Seryi
    JAI, Oxford, United Kingdom
  • E.H. Maclean, R. Martin, R. Tomás
    CERN, Geneva, Switzerland
  
  Funding: European Union's Horizon 2020 research and innovation programme under grant No 654305.
The Future Circular Collider (FCC) design study aims to develop the designs of possible circular colliders in the post LHC era. In particular the FCC-hh will aim to produce proton-proton collisions at a center of mass energy of 100 TeV. Given the large beta functions and integrated length of the quadrupoles of the final focus triplet the effect of systematic and random non linear errors in the magnets are expected to have a severe impact on the stability of the beam. Following the experience on the HL-LHC this work explores the implementation of non-linear correctors to minimize the resonance driving terms arising from the errors of the triplet. Dynamic aperture studies are then performed to study the impact of this correction. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPVA038  
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TUPVA039 Effect of Alignment Errors and Orbit Correctors on the Interaction Region of the FCC-hh quadrupole, optics, dipole, collider 2147
 
  • E. Cruz Alaniz, J.L. Abelleira, A. Seryi, L. van Riesen-Haupt
    JAI, Oxford, United Kingdom
  • J.L. Abelleira, L. van Riesen-Haupt
    University of Oxford, Oxford, United Kingdom
  
  Funding: European Union's Horizon 2020 research and innovation programme under grant No 654305.
The Future Circular Collider (FCC) design study aims to develop the design of possible circular colliders in the LHC era. In particular the FCC-hh will aim to produce proton-proton collisions at a center of mass energy of 100 TeV. The interaction region has been designed to meet the requirements in terms of energy and luminosity. However, as it is the case in any real accelerator, misalignments in the magnets are likely to occur; the effect of these misalignments, if not properly compensated for, can jeopardize the performance of the machine. This study contemplates alignment and field errors in the interaction region in order to estimate the tolerance necessary to provide a good correction measured in terms of deviation of the orbit and strength of the correctors. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPVA039  
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WEPIK004 Luminosity- and Beam- Induced Backgrounds for the FCC-ee Interaction Region Design detector, background, photon, luminosity 2914
 
  • G.G. Voutsinas, P. Janot, A.M. Kolano, E. Perez, N.A. Tehrani
    CERN, Geneva, Switzerland
  • N. Bacchetta
    INFN- Sez. di Padova, Padova, Italy
  • M. Boscolo
    INFN/LNF, Frascati (Roma), Italy
  • M.K. Sullivan
    SLAC, Menlo Park, California, USA
  
  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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WEPIK010 Commissioning Status of SuperKEKB Main Ring Magnet System operation, power-supply, dipole, luminosity 2933
 
  • M. Masuzawa, T. Adachi, K. Egawa, T. Kawamoto, S. Nakamura, Y. Ohsawa, T. Oki, R. Sugahara, R. Ueki
    KEK, Ibaraki, Japan
  
  SuperKEKB is an electron-positron collider, which aims for the very high peak luminosity of 8x1035 cm-2s-1 , 40 times higher than that of KEKB. The SuperKEKB Main Ring (MR) system is very large, consisting of more than 1700 water-cooled normal-conducting magnets and about 900 air-cooled normal-conducting magnets. More than 400 magnets and power supplies were newly fabricated, tested and installed for SuperKEKB Phase I beam operation. The MR magnet system worked well, which contributed greatly to the smooth start-up of the MR. Commissioning status of the MR magnet system during SuperKEKB Phase I operation will be reported. Some problems resulting in beam abort will also be reported.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPIK010  
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WEPIK018 Optics Design for Cepc Double Ring Scheme lattice, optics, emittance, sextupole 2962
 
  • Y. Wang, T.J. Bian, J. Gao, H. Geng, B. Sha, D. Wang, C.H. Yu, Y. Zhang
    IHEP, Beijing, People's Republic of China
  • F. Su
    Institute of High Energy Physics (IHEP), People's Republic of China
  
  CEPC is a future Circular Electron and Positron Collider proposed by China to mainly study the Higgs boson. Its baseline scheme is double ring scheme and alternative scheme is partial double ring scheme. This paper will present the optics design for the main ring of double ring scheme. CEPC will also work as W and Z factories. Compatible optics design for W and Z mode will be presented as well.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPIK018  
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WEPIK034 Progress in the FCC-ee Interaction Region Magnet Design solenoid, detector, quadrupole, emittance 3003
 
  • M. Koratzinos, A.P. Blondel
    DPNC, Genève, Switzerland
  • M. Benedikt, F. Zimmermann
    CERN, Geneva, Switzerland
  • E.R. Bielert
    University of Illinois at Urbana-Champaign, Illinois, USA
  • A.V. Bogomyagkov, S.V. Sinyatkin, P. Vobly
    BINP SB RAS, Novosibirsk, Russia
  • M. Boscolo
    INFN/LNF, Frascati (Roma), Italy
  • M. Dam
    NBI, København, Denmark
  • K. Oide
    KEK, Ibaraki, Japan
  
  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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THPIK121 Eddy Current Analysis for a 1.495 GHz Injection-Locked Magnetron cavity, injection, klystron, SRF 4383
 
  • S.A. Kahn, A. Dudas, R.P. Johnson, M.L. Neubauer
    Muons, Inc, Illinois, USA
  • R.A. Rimmer, H. Wang
    JLab, Newport News, Virginia, USA
  
  Funding: U.S. DOE SBIR/STTR grant DE-SC0013203
An injection-locked amplitude modulated magnetron is being developed as a reliable, efficient RF source that could replace klystrons used in particle accelerators. A trim magnetic coil is used to alter the magnetic field in conjunction with the anode voltage to maintain an SRF cavity voltage while the cavity is experiencing microphonics and changing beam loading. The microphonic noise modes have frequencies in the range 10-100 Hz. The changing magnetic field will induce transient eddy currents in the copper anode of the magnetron which will buck the field in the interaction region. This paper will describe the calculation and handling of the eddy currents in the magnetron. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPIK121  
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