Collimator Dwarfed by Penny (image) Georgia Institute of Technology Share Print E-Mail Caption The collimator next to a penny. The tiny slit on the side contains the more than a dozen channels the excited atoms enter through. The big gaps on top separate the three phases of the exactly aligned collimator cascade. Credit Georgia Tech / Christopher Moore Usage Restrictions None 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.