Calibration probe (image) DOE/Argonne National Laboratory Share Print E-Mail Caption Calibration probe inside of the solenoid magnet at Argonne's 4 Tesla Solenoid Facility. Credit (Image by Mark Lopez, Argonne National Laboratory.) Usage Restrictions None Share Print E-Mail 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.