Magnesium Laser System (IMAGE) Physikalisch-Technische Bundesanstalt (PTB) Caption B. Hemmerling is adjusting the magnesium laser system. Credit PTB 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.