Event calendar file
Department of Nuclear and Atomic Physics Seminars
Numerical modeling of multi-GeV laser-wakefield electron acceleration inside a dielectric capillary tube
by Dr. Bhooshan Paradkar (University of Paris, France)
Monday, August 19, 2013
from
to
(Asia/Kolkata)
at Colaba Campus ( P305 )
at Colaba Campus ( P305 )
| Description |
Laser guiding inside a dielectric capillary [1-2] tube offers a promising approach for building a multistage laser-wakefield accelerator. In this approach, a relativistic electron beam, produced externally, is injected into the wakefield, excited in the moderately non-linear regime by the propagation of the laser pulse inside a gas filled dielectric capillary tube. A dielectric capillary tube, similar to optical fiber, can be used to guide the laser over meter long distances. Its main advantages over plasma channels are simplicity of construction and operation. We have numerically investigated this scheme of laser-wakefield acceleration. Guiding of a short pulse laser inside a dielectric capillary tube over ~1-2 m long distances and acceleration of an externally injected electron bunch to ultra-relativistic energies (~5-10 GeV) are demonstrated in the quasi-linear regime of laser wakefield acceleration. Two-dimensional axisymmetric simulations were performed with the code WAKE-EP [3] that allows computationally efficient simulations of such long scale plasmas. The code extends the performances of the quasi-static particle code, WAKE [4], to simulate the acceleration of externally injected electrons, including beam loading effect, and propagation of laser beam inside the dielectric capillary tube. Details of code modifications along with numerical results demonstrating the generation of high quality ultra-relativistic electron beams inside a dielectric capillary tube will be discussed. |
| Organised by | Dr. Vaibhav Prabhudesai |
