Students Working on HFNG (IMAGE) University of California - Berkeley Caption Graduate students Mauricio Ayllon Unzueta (left) and Jonathan Morrell adjust the high flux neutron generator in an underground vault at UC Berkeley. The aluminum vacuum chamber contains the deuterium plasma and the cathode target where the neutrons are generated via fusion. Credit UC Berkeley photo by Irene Yi 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.