TRIGA Mainz (IMAGE) Johannes Gutenberg Universitaet Mainz Caption Pulse operation with the characteristic blue Cherenkov radiation at TRIGA Mainz. Credit photo/©: Thomas Hartmann, JGU Usage Restrictions This image may only be used in connection with the press release "TRIGA Mainz reaches world record of 20,000 pulses in 50 years" by Johannes Gutenberg University Mainz. 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.