"Carpenter, John Marland"@en . . "Carpenter, Jack"@en . "John Marland Carpenter"@en . "John M. \"Jack\" Carpenter"@en . "John M. \"Jack\" Carpenter is an American nuclear engineer known as the originator of the technique for utilizing accelerator-induced intense pulses of neutrons for research and developing the first spallation slow neutron source based on a proton synchrotron, the Intense Pulsed Neutron Source (IPNS)."@en . . . . "American nuclear engineer" . .