TRIGA Mainz Reactor Hall (image) Johannes Gutenberg Universitaet Mainz Share Print E-Mail Caption This is a view of the reactor hall with beam tube C front left and beam tube D rear left. Credit Thomas Hartmann, JGU Usage Restrictions This image may only be used in connection with the press release "New record at ultracold neutron source in Mainz ", issued by Johannes Gutenberg University Mainz on January 15, 2018. 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.