2016-Jul-22 Accel R&D Biweekly Report
Weekly report ended on July 22, 2016
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 1. Ion polarization: collider injection lattice for spin tracking, orbit correction,
2. Crab crossing: working with Salvador, planning, setting up tools and lattices 3. Miscellaneous: Skew PIC, detector region discussions, ion complex integration
- 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 1. Start research on Ground Motion Activities at the JLEIC 2. Submit An abstract to NA-PAC'16. 3. Vertical dispersion caused by detector solenoid and its influence on IBS life time
- 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.)