Mannhart JRSE (1 of 3) (image) American Institute of Physics Share Print E-Mail Caption This is a view into the test generator, looking at the emitter (~ 3 cm diameter). Credit J.Mannhart/MPG.de Usage Restrictions This image may be used only with appropriate caption and credit. 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.