Yawei Yang-headshot-1x1 (IMAGE) DOE/Argonne National Laboratory Caption Yawei Yang, an assistant radiofrequency engineer at Argonne’s Advanced Photon Source (APS), is mentoring Spencer Kelham during SCGSR. Credit (Image by Argonne National Laboratory.) 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.