Electron Beam Profile: ALS-U vs. ALS (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption The electron beam profile of Berkeley Lab's Advanced Light Source today (left), is compared to the brighter, highly focused beam (right) that is possible with an upgrade known as ALS-U. Credit Berkeley Lab 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.