Magnetic Spectrometers (IMAGE) Tohoku University Caption The magnetic spectrometers, HKS (High resolution Kaon Spectrometer) and HES (High resolution Electron spectrometer) used for the experiment. These spectrometers were constructed and tested in Japan and then shipped to JLab. Credit Tohoku University Usage Restrictions Credit: Tohoku University 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.