Top arrow pointing up



Polarization-Dependent Self-Injection by Above Threshold Ionization Heating in a Laser Wakefield Accelerator

Mar 16, 2020. Publications


We report on the experimental observation of a decreased self-injection threshold by using laser pulses with circular polarization in laser wakefield acceleration experiments in a nonpreformed plasma, compared to the usually employed linear polarization. A significantly higher electron beam charge was also observed for circular polarization compared to linear polarization over a wide range of parameters. Theoretical analysis and quasi-3D particle-in-cell simulations reveal that the self-injection and hence the laser wakefield acceleration is polarization dependent and indicate a different injection mechanism for circularly polarized laser pulses, originating from larger momentum gain by electrons during above threshold ionization. This enables electrons to meet the trapping condition more easily, and the resulting higher plasma temperature was confirmed via spectroscopy of the XUV plasma emission.

DOI: 10.1103/PhysRevLett.124.114801

More From Publications

Jan 16, 2023    Publications

Non-thermal electron acceleration from magnetically driven reconnection in a laboratory plasma

A. Chien, L Gao, S. Zhang, H. Ji, E. G. Blackman, W. Daughton, A. Stanier, A. Le, F. Guo, R. Follett, H. Chen, G....

Read more

Dec 28, 2022    Publications

A Flexible Proton Beam Imaging Energy Spectrometer (PROBIES) for High Repetition Rate or Single-Shot High Eenergy Density (HED) experiments

D. A. Mariscal, B. Z. Djordjević, R. Anirudh, T. Bremer, P. C. Campbell, S. Feister, E. Folsom, E. S. Grace, R....

Read more

Dec 2, 2022    Publications

Ablating Ion Velocity Distributions in Short-Pulse-Heated Solids via X-Ray Doppler Shifts

B. F. Kraus, Lan Gao, W. Fox, K. W. Hill, M. Bitter, P. C. Efthimion, A. Moreau, R. Hollinger, Shoujun Wang, Huanyu...

Read more

Nov 3, 2022    Publications

Ultra-compact x-ray spectrometer for high-repetition-rate laser–plasma experiments

G. Zeraouli, D. Mariscal, E. Grace, G. G. Scott, K. K. Swanson, R. Simpson, B. Z. Djordjevic, R. Nedbailo, H....

Read more

Oct 31, 2022    Publications

Applications of machine learning to a compact magnetic spectrometer for high repetition rate, laser-driven particle acceleration

K. K. Swanson, D. A. Mariscal, B. Z. Djordjevic, G. Zeraouli, G. G. Scott, R. Hollinger, S. Wang, H. Song, B....

Read more

Oct 13, 2022    Publications

Investigation of Proton Beam-Driven Fusion Reactions Generated by an Ultra-Short Petawatt-Scale Laser Pulse

M. S. Schollmeier, V. Shirvanyan, C. Capper, S. Steinke, A. Higginson, R. Hollinger, J. T. Morrison, R. Nedbailo,...

Read more