THz-UED-2 (IMAGE) DOE/SLAC National Accelerator Laboratory Caption A compressor using terahertz radiation to shorten electron bunches is small enough to fit into the palm of a hand. Credit Dawn Harmer/SLAC National Accelerator Laboratory 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.