TRIGA Beam Tube C (image) Johannes Gutenberg Universitaet Mainz Share Print E-Mail Caption UCN source installed on beam tube C of the TRIGA reactor in Mainz. Credit photo/©: Heinz-Martin Schmidt, JGU Usage Restrictions This image may only be used in connection with the press release "TUM and JGU activate new source of ultra-cold neutrons", issued by Johannes Gutenberg University Mainz on Nov. 8, 2016. Share Print E-Mail 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.