Direct laser acceleration in the bubble regime of laser wakefield acceleration

2016 ◽  
Author(s):  
X. Zhang ◽  
V. Khudik ◽  
G. Shvets
Keyword(s):  
Laser Wakefield Acceleration ◽  
Wakefield Acceleration ◽  
Direct Laser ◽  
Laser Wakefield ◽  
Laser Acceleration ◽  
Bubble Regime

scholarly journals High-Density Dynamics of Laser Wakefield Acceleration from Gas Plasmas to Nanotubes

Photonics ◽  
2021 ◽  
Vol 8 (6) ◽  
pp. 216
Author(s):  
Bradley Scott Nicks ◽  
Ernesto Barraza-Valdez ◽  
Sahel Hakimi ◽  
Kyle Chesnut ◽  
Genevieve DeGrandchamp ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Critical Density ◽  
High Density ◽  
Laser Wakefield Acceleration ◽  
Particle In Cell ◽  
Wakefield Acceleration ◽  
Laser Wakefield ◽  
Sheath Formation ◽  
Laser Acceleration ◽  
Density Regime

The electron dynamics of laser wakefield acceleration (LWFA) is examined in the high-density regime using particle-in-cell simulations. These simulations model the electron source as a target of carbon nanotubes. Carbon nanotubes readily allow access to near-critical densities and may have other advantageous properties for potential medical applications of electron acceleration. In the near-critical density regime, electrons are accelerated by the ponderomotive force followed by the electron sheath formation, resulting in a flow of bulk electrons. This behavior represents a qualitatively distinct regime from that of low-density LWFA. A quantitative entropy index for differentiating these regimes is proposed. The dependence of accelerated electron energy on laser amplitude is also examined. For the majority of this study, the laser propagates along the axis of the target of carbon nanotubes in a 1D geometry. After the fundamental high-density physics is established, an alternative, 2D scheme of laser acceleration of electrons using carbon nanotubes is considered.

Inverse free electron lasers and laser wakefield acceleration driven by CO 2 lasers

2006 ◽  
Vol 364 (1840) ◽  
pp. 611-622 ◽  
Author(s):  
W.D Kimura ◽  
N.E Andreev ◽  
M Babzien ◽  
I Ben-Zvi ◽  
D.B Cline ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Free Electron ◽  
Trapping Efficiency ◽  
Seed Pulse ◽  
Free Electron Lasers ◽  
Laser Wakefield Acceleration ◽  
Laser Plasma Interactions ◽  
Wakefield Acceleration ◽  
Laser Wakefield ◽  
Laser Acceleration

The staged electron laser acceleration (STELLA) experiment demonstrated staging between two laser-driven devices, high trapping efficiency of microbunches within the accelerating field and narrow energy spread during laser acceleration. These are important for practical laser-driven accelerators. STELLA used inverse free electron lasers, which were chosen primarily for convenience. Nevertheless, the STELLA approach can be applied to other laser acceleration methods, in particular, laser-driven plasma accelerators. STELLA is now conducting experiments on laser wakefield acceleration (LWFA). Two novel LWFA approaches are being investigated. In the first one, called pseudo-resonant LWFA, a laser pulse enters a low-density plasma where nonlinear laser/plasma interactions cause the laser pulse shape to steepen, thereby creating strong wakefields. A witness e -beam pulse probes the wakefields. The second one, called seeded self-modulated LWFA, involves sending a seed e -beam pulse into the plasma to initiate wakefield formation. These wakefields are amplified by a laser pulse following shortly after the seed pulse. A second e -beam pulse (witness) follows the seed pulse to probe the wakefields. These LWFA experiments will also be the first ones driven by a CO 2 laser beam.

Overloading effect of energetic electrons in the bubble regime of laser wakefield acceleration

2010 ◽  
Vol 17 (10) ◽  
pp. 103108 ◽  
Author(s):  
Jiancai Xu ◽  
Baifei Shen ◽  
Xiaomei Zhang ◽  
Meng Wen ◽  
Liangliang Ji ◽  
...  
Keyword(s):  
Laser Wakefield Acceleration ◽  
Energetic Electrons ◽  
Wakefield Acceleration ◽  
Laser Wakefield ◽  
Bubble Regime

Complete characterization of laser wakefield acceleration

2011 ◽  
Author(s):  
Laszlo Veisz ◽  
Alexander Buck ◽  
Maria Nicolai ◽  
Karl Schmid ◽  
Chris M. S. Sears ◽  
...  
Keyword(s):  
Complete Characterization ◽  
Laser Wakefield Acceleration ◽  
Wakefield Acceleration ◽  
Laser Wakefield
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