Top arrow pointing up

Resources

Resources

Relativistically transparent magnetic filaments: scaling laws, initial results and prospects for strong-field QED studies

Sep 17, 2021. Publications

Abstract

Relativistic transparency enables volumetric laser interaction with overdense plasmas and direct laser acceleration of electrons to relativistic velocities. The dense electron current generates a magnetic filament with field strength of the order of the laser amplitude (>105 T). The magnetic filament traps the electrons radially, enabling efficient acceleration and conversion of laser energy into MeV photons by electron oscillations in the filament. The use of microstructured targets stabilizes the hosing instabilities associated with relativistically transparent interactions, resulting in robust and repeatable production of this phenomenon. Analytical scaling laws are derived to describe the radiated photon spectrum and energy from the magnetic filament phenomenon in terms of the laser intensity, focal radius, pulse duration, and the plasma density. These scaling laws are compared to 3D particle-in-cell (PIC) simulations, demonstrating agreement over two regimes of focal radius. Preliminary experiments to study this phenomenon at moderate intensity (a0 ∼ 30) were performed on the Texas Petawatt Laser. Experimental signatures of the magnetic filament phenomenon are observed in the electron and photon spectra recorded in a subset of these experiments that is consistent with the experimental design, analytical scaling and 3D PIC simulations. Implications for future experimental campaigns are discussed.

DOI: 10.1088/1367-2630/ac22e7

More From Publications

Jan 11, 2022    Publications

Vacuum laser acceleration of super-ponderomotive electrons using relativistic transparency injection

P. K. Singh, F.-Y. Li, C.-K. Huang, A. Moreau, R. Hollinger, A. Junghans, S. Wang, A. Favalli, C. Calvi, Y. Wang, H....

Read more

Dec 9, 2021    Publications

Emittance preserving thin film plasma mirrors for GeV scale laser plasma accelerators

A. Zingale, N. Czapla, D. M. Nasir, S. K. Barber, J. H. Bin, A. J. Gonsalves, F. Isono, J. van Tilborg, S. Steinke,...

Read more

Dec 3, 2021    Publications

Towards High-Repetition-Rate Fast Neutron Sources Using Novel Enabling Technologies

F. Treffert, C. B. Curry, T. Ditmire, G. D. Glenn, H. J. Quevedo, M. Roth, C. Schoenwaelder, M. Zimmer, S. H....

Read more

Dec 2, 2021    Publications

Experimental observation of polarization-resolved nonlinear Thomson scattering of elliptically polarized light

C. Fruhling, J. Wang, D. Umstadter, C. Schulzke, M. Romero, M. Ware, and J. Peatross. Phys. Rev. A 104, 053519, (2021).

Read more

Nov 29, 2021    Publications

Solid-Density Ion Temperature from Redshifted and Double-Peaked Stark Line Shapes

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

Read more

Aug 5, 2021    Publications

Electron energization during merging of self-magnetized, high-beta, laser-produced plasmas

G. Fiksel, W. Fox, M. J. Rosenberg, D. B. Schaeffer, J. Matteucci  and A. Bhattacharjee, J. Plasma Phys., 87(4),...

Read more