Radial Time Projection Chamber (IMAGE) University of Calgary Caption A TRIUMF physicist makes an adjustment to the Radial Time Projection Chamber, a position- sensitive particle detector that surrounds the antihydrogen trap. Credit TRIUMF Usage Restrictions None 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.