Gas cell drawing (IMAGE) University of Texas at Austin Caption Gas cell drawing. Inside, an extremely powerful laser strikes helium gas, heats it into a plasma and creates waves that kick electrons from the gas out in a high-energy electron beam. Nanoparticles—generated by a secondary laser shining through the top window and striking a metal plate—boost the energy transferred to the electrons. Credit University of Texas at Austin Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.