PAC2013 - List of Authors (Yu, P.)

Paper	Title	Page
MOPAC47	Simulation of Laser Wakefield Acceleration in the Lorentz Boosted Frame with UPIC-EMMA	168
	P. Yu, W. An, V.K. Decyk, W.B. Mori, F.S. Tsung UCLA, Los Angeles, California, USA R.A. Fonseca, L.O. Silva, J. Vieira Instituto Superior Tecnico, Lisbon, Portugal W. Lu, X.L. Xu TUB, Beijing, People's Republic of China
	Funding: Work supported by the US DoE under grants DE-SC0008491, DE-FG02-92- ER40727, DE-SC0008316 and DE-SC0007970, and by National Science Foundation under grants PHY-0936266, PHY-0960344 and PHY-0934856. Simulation of laser wakefield accelerator (LWFA) in the Lorentz boosted frame, in which the laser and plasma spatial scales are comparable, can lead to computational time speed-ups to several orders of magnitude. In these simulation the relativistic drifting plasma inevitably induces a high frequency numerical instability. To reduce this numerical instability, we developed an EM-PIC code, UPIC-EMMA, based on the components of UCLA PIC framework (UPIC) which uses a spectral solver to advance the electromagnetic field in the Fourier space. With a low pass or "ring" filter implemented in the spectral solver, the numerical instability can be eliminated. In this paper we describe the new code, UPIC-EMMA, and present results from the code of LWFA simulation in the Lorentz boosted frame. These include the modeling cases where there are no self-trapped electrons, and modeling the self-trapped regime. Detailed comparison among Lorentz boosted frame results and lab frame results obtained from OSIRIS are given. We have used UPIC-EMMA to study LWFA in the self-guided regime to 100 GeV and good agreement was found with analytical scaling.

Paper

Title

Page

Simulation of Laser Wakefield Acceleration in the Lorentz Boosted Frame with UPIC-EMMA

168

P. Yu, W. An, V.K. Decyk, W.B. Mori, F.S. Tsung
UCLA, Los Angeles, California, USA
R.A. Fonseca, L.O. Silva, J. Vieira
Instituto Superior Tecnico, Lisbon, Portugal
W. Lu, X.L. Xu
TUB, Beijing, People's Republic of China

Funding: Work supported by the US DoE under grants DE-SC0008491, DE-FG02-92- ER40727, DE-SC0008316 and DE-SC0007970, and by National Science Foundation under grants PHY-0936266, PHY-0960344 and PHY-0934856.
Simulation of laser wakefield accelerator (LWFA) in the Lorentz boosted frame, in which the laser and plasma spatial scales are comparable, can lead to computational time speed-ups to several orders of magnitude. In these simulation the relativistic drifting plasma inevitably induces a high frequency numerical instability. To reduce this numerical instability, we developed an EM-PIC code, UPIC-EMMA, based on the components of UCLA PIC framework (UPIC) which uses a spectral solver to advance the electromagnetic field in the Fourier space. With a low pass or "ring" filter implemented in the spectral solver, the numerical instability can be eliminated. In this paper we describe the new code, UPIC-EMMA, and present results from the code of LWFA simulation in the Lorentz boosted frame. These include the modeling cases where there are no self-trapped electrons, and modeling the self-trapped regime. Detailed comparison among Lorentz boosted frame results and lab frame results obtained from OSIRIS are given. We have used UPIC-EMMA to study LWFA in the self-guided regime to 100 GeV and good agreement was found with analytical scaling.