Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Plasma Physics
Volume 67, Number 15
Monday–Friday, October 17–21, 2022; Spokane, Washington
Session GO08: Laser-Plasma Wakefield and Direct Laser Accelerators
9:30 AM–12:30 PM,
Tuesday, October 18, 2022
Room: 402 ABC
Chair: Frank Tsung, University of California, Los Angeles
Abstract: GO08.00003 : Effects of plasma density fluctuations in laser wakefield accelerators*
9:54 AM–10:06 AM
Presenter:
Claudia C Cobo
(University of York)
Authors:
Claudia C Cobo
(University of York)
Matthew Streeter
(Queen's University Belfast)
Eva E Los
(Imperial College London)
Christopher Arran
(University of York)
Gianluca Sarri
(Queen's University Belfast)
Christopher P Ridgers
(University of York)
Stuart P.D. Mangles
(Imperial College London)
Chris D Murphy
(University of York)
We present experimental results of the electron beams generated by a non-linear laser wakefield accelerator in a helium gas jet target with and without a density transition produced by a razor blade in the flow. Non-uniformities in the plasma profile, along with shot-to-shot variations for nominally equal conditions, are diagnosed via interferometry, and correlated to the characteristics of the accelerated electrons. The findings are supported by particle-in-cell simulations.
*This work was supported by the Engineering and Physical Sciences Research Council grant [EP/L01663X/1]. The authors would also like to acknowledge the support provided by the staff at STFC's Central Laser Facility.
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