Tandem Van de Graaff (IMAGE) DOE/Brookhaven National Laboratory Caption Tandem Van de Graaff staff walked students through accelerator calibration. Credit (Kevin Coughlin/Brookhaven National Laboratory) Usage Restrictions For use with this story and related content License Original 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.