Atom probe metal alloy (IMAGE) DOE/Pacific Northwest National Laboratory Caption Microscopic samples of complex metal alloy are placed on a sampling vessel to enter the atom probe tomography instrument. Credit Photo by Andrea Starr | Pacific Northwest National Laboratory Usage Restrictions No restrictions. License Public Domain 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.