Shock assisted ionization injection in laser-plasma accelerators

Ionization injection is a simple and efficient method to trap an electron beam in a laser plasma accelerator. Yet, because of a long injection length, this injection technique leads generally to the production of large energy spread electron beams. Here, we propose to use a shock front transition to localize the injection. Experimental results show that the energy spread can be reduced down to 10 MeV and that the beam energy can be tuned by varying the position of the shock. This simple technique leads to very stable and reliable injection even for modest laser energy. It should therefore become a unique tool for the development of laser-plasma accelerators.

[1]  J. Mikhailova,et al.  Shock-front injector for high-quality laser-plasma acceleration. , 2013, Physical review letters.

[2]  Erik Lefebvre,et al.  Field ionization model implemented in Particle In Cell code and applied to laser-accelerated carbon ions , 2011 .

[3]  Erik Lefebvre,et al.  Particle-in-Cell modelling of laser-plasma interaction using Fourier decomposition , 2009, J. Comput. Phys..

[4]  Eric Esarey,et al.  Theory of ionization-induced trapping in laser-plasma accelerators , 2012 .

[5]  Ferenc Krausz,et al.  Density-transition based electron injector for laser driven wakefield accelerators , 2010 .

[6]  Victor Malka,et al.  Laser-plasma lens for laser-wakefield accelerators , 2014 .

[7]  I. V. Glazyrin,et al.  Ionization induced trapping in a laser wakefield accelerator. , 2009, Physical review letters.

[8]  A. Dangor,et al.  Low energy spread electron beams from ionization injection in a weakly relativistic laser wakefield accelerator , 2014 .

[9]  Jie Zhang,et al.  Electron injection and trapping in a laser wakefield by field ionization to high-charge states of gases , 2006 .

[10]  K. Nakamura,et al.  Multi-GeV electron beams from capillary-discharge-guided subpetawatt laser pulses in the self-trapping regime. , 2014, Physical review letters.

[11]  Stepan Bulanov,et al.  Thermal emittance from ionization-induced trapping in plasma accelerators , 2014 .

[12]  T. Ditmire,et al.  Quasi-monoenergetic laser-plasma acceleration of electrons to 2 GeV , 2013, Nature Communications.

[13]  A Pak,et al.  Injection and trapping of tunnel-ionized electrons into laser-produced wakes. , 2009, Physical review letters.

[14]  V Malka,et al.  Observation of longitudinal and transverse self-injections in laser-plasma accelerators , 2013, Nature Communications.

[15]  Victor Malka,et al.  Physics of fully-loaded laser-plasma accelerators , 2015 .

[16]  C. Geddes,et al.  Two-color laser-ionization injection. , 2014, Physical review letters.

[17]  Tae Jun Yu,et al.  Enhancement of electron energy to the multi-GeV regime by a dual-stage laser-wakefield accelerator pumped by petawatt laser pulses. , 2013, Physical review letters.

[18]  California,et al.  Generating high-brightness electron beams via ionization injection by transverse colliding lasers in a plasma-wakefield accelerator. , 2013, Physical review letters.

[19]  Erik Lefebvre,et al.  Few femtosecond, few kiloampere electron bunch produced by a laser-plasma accelerator , 2011 .

[20]  Two-pulse ionization injection into quasilinear laser wakefields. , 2013, Physical review letters.

[21]  S. Sebban,et al.  Demonstration of relativistic electron beam focusing by a laser-plasma lens , 2014, Nature Communications.

[22]  Y. Glinec,et al.  Controlled injection and acceleration of electrons in plasma wakefields by colliding laser pulses , 2006, Nature.

[23]  Zhi‐zhan Xu,et al.  All-optical cascaded laser wakefield accelerator using ionization-induced injection. , 2011, Physical review letters.

[24]  Wei Lu,et al.  Controlled ionization-induced injection by tailoring the gas-density profile in laser wakefield acceleration , 2012, Journal of Plasma Physics.

[25]  A. Jullien,et al.  Effect of the Laser Wave Front in a Laser-Plasma Accelerator , 2015 .

[26]  A Pak,et al.  Demonstration of a narrow energy spread, ∼0.5  GeV electron beam from a two-stage laser wakefield accelerator. , 2011, Physical review letters.

[27]  A Pak,et al.  Self-guided laser wakefield acceleration beyond 1 GeV using ionization-induced injection. , 2010, Physical review letters.

[28]  Donald P. Umstadter,et al.  Tunable monoenergetic electron beams from independently controllable laser-wakefield acceleration and injection , 2015 .