PAC2013 - List of Authors (Bell, G.I.)

Paper	Title	Page
TUPHO02	Single Pass Electron Cooling Simulations for MEIC	583
	G.I. Bell, I.V. Pogorelov, B.T. Schwartz Tech-X, Boulder, Colorado, USA H. Zhang, Y. Zhang JLAB, Newport News, Virginia, USA
	Funding: This work is supported by the US DOE Office of Science, Office of Nuclear Physics, grant numbers DE-SC0009508 and DE-SC0000835. Resources of NERSC were used under contract No. DE-AC02-05CH11231. Cooling of medium energy protons is critical for the proposed Jefferson Lab Medium Energy Ion Collider (MEIC). We present simulations of electron cooling of protons up to 60 GeV. In the beam frame in which the proton and electrons are co-propagating, their motion is non-relativistic. We use a binary collision model which treats the cooling process as the sum of a large number of two-body collisions which are calculated exactly. This model can treat even very close collisions between an electron and ion with high accuracy. We also calculate dynamical friction using a delta-f PIC model. The code VSim (formerly Vorpal) is used to perform the simulations. We compare the friction rates with that obtained by a 3D integral over electron velocities which is used by BETACOOL.

Paper

Title

Page

Single Pass Electron Cooling Simulations for MEIC

583

G.I. Bell, I.V. Pogorelov, B.T. Schwartz
Tech-X, Boulder, Colorado, USA
H. Zhang, Y. Zhang
JLAB, Newport News, Virginia, USA

Funding: This work is supported by the US DOE Office of Science, Office of Nuclear Physics, grant numbers DE-SC0009508 and DE-SC0000835. Resources of NERSC were used under contract No. DE-AC02-05CH11231.
Cooling of medium energy protons is critical for the proposed Jefferson Lab Medium Energy Ion Collider (MEIC). We present simulations of electron cooling of protons up to 60 GeV. In the beam frame in which the proton and electrons are co-propagating, their motion is non-relativistic. We use a binary collision model which treats the cooling process as the sum of a large number of two-body collisions which are calculated exactly. This model can treat even very close collisions between an electron and ion with high accuracy. We also calculate dynamical friction using a delta-f PIC model. The code VSim (formerly Vorpal) is used to perform the simulations. We compare the friction rates with that obtained by a 3D integral over electron velocities which is used by BETACOOL.