Top arrow pointing up



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

Jan 11, 2022. Publications


Intense lasers can accelerate electrons to very high energy over a short distance. Such compact accelerators have several potential applications including fast ignition, high energy physics, and radiography. Among the various schemes of laser-based electron acceleration, vacuum laser acceleration has the merits of super-high acceleration gradient and great simplicity. Yet its realization has been difficult because injecting free electrons into the fast- oscillating laser field is not trivial. Here we demonstrate free-electron injection and sub- sequent vacuum laser acceleration of electrons up to 20 MeV using the relativistic trans- parency effect. When a high-contrast intense laser drives a thin solid foil, electrons from the dense opaque plasma are first accelerated to near-light speed by the standing laser wave in front of the solid foil and subsequently injected into the transmitted laser field as the opaque plasma becomes relativistically transparent. It is possible to further optimize the electron injection/acceleration by manipulating the laser polarization, incident angle, and temporal pulse shaping. Our result also sheds light on the fundamental relativistic transparency pro- cess, crucial for producing secondary particle and light sources. 


More From Publications

Sep 21, 2022    Publications

Homogeneous, Micron-Scale High-Energy-Density Matter Generated by Relativistic Laser-Solid Interactions

N. F. Beier, H. Allison, P. Efthimion, K. A. Flippo, L. Gao, S. B. Hansen, K. Hill, R. Hollinger, M. Logantha, Y....

Read more

Jul 27, 2022    Publications

High-repetition-rate, multi-MeV deuteron acceleration from converging heavy water microjets at laser intensities of 10 21 W/cm2

F. Treffert, C. B. Curry, H.-G. J. Chou, C. J. Crissman, D. P. DePonte, F. Fiuza, G. D. Glenn, R. C. Hollinger, R....

Read more

Jun 27, 2022    Publications

A laser parameter study on enhancing proton generation from microtube foil targets

J. Strehlow, J. Kim, M. Bailly-Grandvaux, S. Bolaños, H. Smith, A. Haid, E. L. Alfonso, C. Aniculaesei, H. Chen, T....

Read more

Apr 20, 2022    Publications

Transient Relativistic Plasma Grating to Tailor High-Power Laser Fields, Wakefield Plasma Waves, and Electron Injection

Q. Chen, D. Maslarova, J. Wang, S. X. Lee, V. Horny, and D. Umstadter. Phys. Rev. Lett. 128, 164801, (2022).

Read more

Apr 9, 2022    Publications

Enhancement of high energy X-ray radiography using compound parabolic concentrator targets

P. M. King, D. Rusby, A. Hannasch, N. Lemos, G. Tiwari, A. Pak, S. Kerr, G. Cochran, I. Pagano, G. J. Williams, S. F....

Read more

Jan 27, 2022    Publications

A new platform for ultra‑high dose rate radiobiological research using the BELLA PW laser proton beamline

J. Bin, L. Obst-Huebl, J.-H. Mao, K. Nakamura, L. D. Geulig, H. Chang, Q. Ji, L. He, J. De Chant, Z. Kober, A. J....

Read more