Author: Bogacz, S.A.
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WEPVA040 Design of Imaginary Transition Gamma Booster Synchrotron for the Jefferson Lab EIC (JLEIC) 3350
 
  • S.A. Bogacz
    JLab, Newport News, Virginia, USA
 
  Funding: Work has been authored by Jefferson Science Associates, LLC under Contract No. DE-AC05-06OR23177 with the U.S. Department of Energy. The U.S. Government retains a non- exclusive, world-wide license to publish or reproduce this manuscript, or allow others to do so, for U.S. Government purposes.
Baseline design of the JLEIC booster synchrotron is presented. Its aim is to inject and accumulate heavy ions and protons at 285 MeV, to accelerate them to about 7 GeV, and finally to extract them into the ion collider ring. The Figure-8 ring features two 260 deg. achromatic arcs configured with negative momentum compaction lattices, designed to avoid transition crossing for all ion species during the course of acceleration. The arc optics is based on a lightly perturbed 90 deg. FODO, with missing dipoles every fourth half-cell, where the horizontal dispersion is driven partly negative for the inward bending arc leading to negative momentum compaction. The lattice also features a specialized high dispersion injection insert optimized to facilitate the transverse phase-space painting in both planes for multi-turn ion injection. Furthermore, the lattice has been optimized to mitigate magnet error sensitivity and to ease chromaticity correction with two families of sextupoles in each plane. The booster ring is configured with super-ferric, 3 Tesla bends. We are presently launching optimization of the booster synchrotron design to operate in the extreme space-charge dominated regime.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPVA040  
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THPAB081 The Effects of Space-Charge on the Dynamics of the Ion Booster in the Jefferson Lab EIC (JLEIC) 3906
 
  • E.W. Nissen, S.A. Bogacz
    JLab, Newport News, Virginia, USA
 
  Funding: Notice: This manuscript has been authored by Jefferson Science Associates, LLC under Contract No. DE-AC05-06OR23177 with the U.S. Department of Energy.
Optimization of the booster synchrotron design to operate in the extreme space-charge dominated regime is proposed. This study is motivated by the ultra-high luminosity promised by the JLEIC accelerator complex, which poses several beam dynamics and lattice design challenges for its individual components. We examine the effects of space charge on the dynamics of the booster synchrotron for the proposed JLEIC electron ion collider. This booster will inject and accumulate protons and heavy ions at an energy of 280 MeV and then engage in a process of acceleration and electron cooling to bring it to its extraction energy of 8 GeV. This would then be sent into the ion collider ring part of JLEIC. In order to examine the effects of space charge on the dynamics of this process we use the software SYNERGIA.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB081  
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