Two Electron Bunches (IMAGE) DOE/SLAC National Accelerator Laboratory Caption This simulation depicts two electron bunches -- containing 5 billion to 6 billion electrons each -- that were accelerated by a laser-generated column of plasma inside an oven of hot lithium gas during experiments at SLAC. The first bunch in each pair was the drive bunch; it blasted all the free electrons away from the lithium atoms, leaving the positively charged lithium nuclei behind -- a configuration known as the "blowout regime." The blasted electrons then fell back in behind the second bunch of electrons, known as the trailing bunch, forming a "plasma wake" that propelled the trailing bunch to higher energy. Credit SLAC National Accelerator Laboratory Usage Restrictions None License Licensed 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.