Room: AAPM ePoster Library
Purpose: To produce a low energy, keV to MeV, electron beam via laser wakefield acceleration (LWFA) that can be used for medical applications.
Methods: energy LWFA electron beams can be produced by a laser irradiating high density nanomaterials or plasma. This process was considered theoretically and simulated using the particle-in-cell (PIC) code EPOCH where a laser in vacuum enters a uniform high density plasma of electrons and protons. In this regime, the electron density is 0.1~1 times critical density.
Results: Calculations indicate that, for a laser beam intensity of 1016 W/cm2, a stream of low energy electrons can be ejected from the laser-matter interaction site. These electrons can have energies from 100 keV to 1 MeV and the electron fluence can be increased by increasing the laser pulse length.
Conclusion: LWFA in a high density matter can result in a compact device of low energy electrons. The electron energy range could have useful applications in radiotherapy like treatment of superficial lesions, interstitial insertion, endoscopic treatment, and/or Brachytherapy.