2016-Jul-22 Accel. R and D Biweekly Report

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Slava Derbenev

  • worked on various issues for JLEIC, particularly strong cooling

Fanglei Lin

  • Finished a prototype of an electron collider ring optics with TME-like arc cells and initiated the study of the beam nonlinear dynamics.
  • Started the study of the beam nonlinear dynamics in a prototype of an electron collider ring optics with new-magnet FODO arc cells.
  • Miscellaneous: attended the bi-weekly non-linear beam dynamics meeting, attended the JLEIC NP oriented meeting, attended the JLEIC modeling meeting, attended a discussion of optimization of JLEIC luminosity.

Vasily Morozov

  • Ion polarization: collider injection lattice for spin tracking, orbit correction, debugging Zgoubi
  • Crab crossing: working with Salvador, planning, setting up tools and lattices
  • Miscellaneous: Skew PIC, detector region discussions, ion complex integration

Amy Sy

  • Continued work on compensation of nonlinear effects for Skew PIC channel. Reoptimization of octupoles due to asymmetric particle distribution. Newly optimized octupoles correct the average radial offset to values ~20-30% larger than in previous simulations. Comparison of optimized octupole values for particle distributions with and without momentum spread.
  • Continued ERL merger studies in G4Beamline. Studying longitudinal emittance growth in the presence of transverse magnetic fields.
  • Literature search on polarized ion sources in context of JLEIC required parameters.

Guohui Wei

  • Start research on Ground Motion Activities at the JLEIC
  • Submit An abstract to NA-PAC'16.
  • Vertical dispersion caused by detector solenoid and its influence on IBS life time

Yuhong Zhang

  • Participated in cooling experiment data analyses
  • Attended many meetings
  • Worked on luminosity performance without cooling
  • Worked with colleagues on various JLEIC issues (strong cooling, ground motion and e-ring redesign, etc.)