Kinetic energy of accelerated electrons in laser-driven wakefield

In order to study kinetic energy of accelerated electrons in a laser-driven wakefield,maximum and minimum potential of the wakefield that could determine the maximum kinetic energy of the electrons was found by applying the particle in cell method.The peak and valley potential of the plasma wakefield and its relations to laser pulse length and intensity were discussed.It is shown that the maximum energy of a trapped electron is proportional to the intensity of the laser pulse and it reaches maximum value when the laser pulse length equals to nearly ten times of the wavelength.