PAC09 - List of Authors (Gholizadeh, R.)

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Gholizadeh, R.

Paper	Title	Page
FR5RFP024	Preservation of Ultra Low Emittances in Future High Energy Plasma Wakefield-Based Colliders	4585
	R. Gholizadeh, P. Muggli USC, Los Angeles, California C. Huang, W.B. Mori UCLA, Los Angeles, California T.C. Katsouleas Duke University, Durham, North Carolina
	Funding: Work supported by US Department of Energy. Plasma Wakefield Accelerator has been proven to be a promising technique to lower the cost of the future high energy colliders by offering orders of magnitude higher gradients than the conventional accelerators. However, it has been shown that ion motion is an important issue to account for in the extreme regime of ultra high intensities and ultra low emittances, characteristics of future high energy colliders. In this regime, the transverse electric field of the beam is so high that the plasma ions cannot be considered immobile at the time scale of electron plasma oscillations, thereby leading to a nonlinear focusing force. Therefore, the transverse emittance of a beam matched to the initial linear focusing will not be preserved under these circumstances. However, Vlasov equation predicts a matching profile even in the nonlinear regime. Furthermore, we extend the idea and introduce a plasma section that can match the entire beam to the mobile-ion regime of plasma. We also find the analytic solution for the optimal matching section. Simulation results will be presented.

Paper

Title

Page

FR5RFP024

Preservation of Ultra Low Emittances in Future High Energy Plasma Wakefield-Based Colliders

4585

R. Gholizadeh, P. Muggli
USC, Los Angeles, California
C. Huang, W.B. Mori
UCLA, Los Angeles, California
T.C. Katsouleas
Duke University, Durham, North Carolina

Funding: Work supported by US Department of Energy.

Plasma Wakefield Accelerator has been proven to be a promising technique to lower the cost of the future high energy colliders by offering orders of magnitude higher gradients than the conventional accelerators. However, it has been shown that ion motion is an important issue to account for in the extreme regime of ultra high intensities and ultra low emittances, characteristics of future high energy colliders. In this regime, the transverse electric field of the beam is so high that the plasma ions cannot be considered immobile at the time scale of electron plasma oscillations, thereby leading to a nonlinear focusing force. Therefore, the transverse emittance of a beam matched to the initial linear focusing will not be preserved under these circumstances. However, Vlasov equation predicts a matching profile even in the nonlinear regime. Furthermore, we extend the idea and introduce a plasma section that can match the entire beam to the mobile-ion regime of plasma. We also find the analytic solution for the optimal matching section. Simulation results will be presented.