Dynamics of ionization-induced electron injection in the high density regime of laser wakefield acceleration

Desforges, F. G. (author)

Paradkar, B. S. (author)

Hansson, Magnus (author): Lund University,Lunds universitet,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Physics,Departments at LTH,Faculty of Engineering, LTH

Ju, J. (author)

Senje, Lovisa (author): Lund University,Lunds universitet,Atomfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Atomic Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH

Audet, T. L. (author)

Persson, A. (author)

Dobosz-Dufrenoy, S. (author)

Lundh, Olle (author): Lund University,Lunds universitet,Atomfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Atomic Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH

Maynard, G. (author)

Monot, P. (author)

Vay, J. -L. (author)

Wahlström, Claes-Göran (author): Lund University,Lunds universitet,Atomfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Atomic Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH

Cros, B. (author)

(creator_code:org_t)

AIP Publishing, 2014
2014
English.
In: Physics of Plasmas. - : AIP Publishing. - 1070-664X .- 1089-7674. ; 21:12

Related links:: http://dx.doi.org/10...; show more...; https://lup.lub.lu.s...; https://doi.org/10.1...; show less...

Abstract Subject headings

The dynamics of ionization-induced electron injection in high density (similar to 1.2 x 10(19) cm(-3)) regime of laser wakefield acceleration is investigated by analyzing the betatron X-ray emission. In such high density operation, the laser normalized vector potential exceeds the injection-thresholds of both ionization-injection and self-injection due to self-focusing. In this regime, direct experimental evidence of early on-set of ionization-induced injection into the plasma wave is given by mapping the X-ray emission zone inside the plasma. Particle-In-Cell simulations show that this early on-set of ionization-induced injection, due to its lower trapping threshold, suppresses the trapping of self-injected electrons. A comparative study of the electron and X-ray properties is performed for both self-injection and ionization-induced injection. An increase of X-ray fluence by at least a factor of two is observed in the case of ionization-induced injection due to increased trapped charge compared to self-injection mechanism. (C) 2014 AIP Publishing LLC.

By the author/editor: Desforges, F. G.; Paradkar, B. S.; Hansson, Magnus; Ju, J.; Senje, Lovisa; Audet, T. L.; show more...; Persson, A.; Dobosz-Dufrenoy, ...; Lundh, Olle; Maynard, G.; Monot, P.; Vay, J. -L.; Wahlström, Claes ...; Cros, B.; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Atom and Molecul ...

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