John M. Carpenter served as Professor of Nuclear Engineering at the University of Michigan from 1964 until 1975. He moved to Argonne National Laboratory in 1975 to assume responsibility for development of pulsed spallation neutron sources. There, he and his colleagues built and operated the first-ever pulsed spallation neutron sources equipped for neutron scattering, ZING-P, ZING-P’, and, later, the Intense Pulsed Neutron Source (IPNS). He retired in 2007 and now as Emeritus Scientist maintains his office at Argonne.
Chun-Keung Loong served for 25 years at Argonne National Laboratory. In 1982 he joined the IPNS division, becoming a senior physicist in 1997. He worked on the development of pulsed-source neutron chopper spectrometers and conducted materials research with users at IPNS and collaborators elsewhere. Since retirement in 2007, he has worked with the neutron-scattering community in China for development of neutron user facilities and with the Union for Compact Accelerator-driven Neutron Sources for worldwide neutron research and applications.