[local physicists] FW: Colloquium Announcement 2/6/2014 (Dr. He Zhang) NOTE: Different Location

[Malin, Delicia M.]

Old Dominion University
Department of Physics

Special Spring Colloquium

Thursday February 6, 2014

"Space Charge Effect Simulation Using DA Based FMM and Electron Cooling Simulation for JLab's MEIC Project"

Dr. He Zhang
Jefferson Lab


In the first part of the talk, a method will be presented that allows the computation of space charge effects of arbitrary and large distributions of particles in an efficient and accurate way based on a variant of the
Fast Multipole Method (FMM). It relies on an automatic multigrid-based decomposition of charges in near and far regions and the use of high-order differential algebra (DA) methods to obtain decompositions of fields that scales with a high power of the order. Given an ensemble of N particles, the computational expense scales as O(N). Simulation results on the photoemission process and bunch evolution during the creation of a femtosecond electron bunch will also be presented. The second part of the talk will include a brief introduction of Jefferson Lab's MEIC project and simulation results on its electron cooling system, which is crucial to achieve high brilliance.


Presentation: ECCS Auditorium @ 3:00 pm
Refreshments: OCNPS 200 Atrium @ 2:30 pm
All interested persons are cordially invited to attend.



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