Rolf Ent is the Hall C leader for Jefferson Lab. He provides scientific leadership, guidance and coordination for the Hall C user community; supervision of the Hall C physics staff, postdocs, students, engineering, and technical staff; and Hall C operations leadership by managing resource allocation for support of research in Hall C.
Dr. Ent was appointed Hall C leader in 2002. Prior to that, he had worked as a Hall C staff scientist and associate professor at Hampton University since 1993 and served as associate director for experimental research of the NuHEP (Nuclear/High Energy Physics Research Center of Excellence) at Hampton University from 1996-2002. Dr. Ent began his research career at NIKHEF in 1985, where, for his dissertation, he started an electron-induced cluster knockout program to investigate two- and more-nucleon correlations in nuclei. Dr. Ent's 1989-1990 postdoc research at CERN (with the University of Virginia) was connected with the development of the polarized solid state target, which was used in measurements of the spin structure functions of the proton and neutron. In 1990, Dr. Ent began postdoc research at MIT, focusing on rendering a description of the BLAST large acceptance detector with GEANT and Monte Carlo simulation studies of the detector's expected performance. He set up the electron detection, online and offline software for the measurement of quasielastic (e,e'p) scattering at large momentum transfer at SLAC and subsequent analysis of the data. He also conducted experiments with polarized 3He targets at Bates, IUCF, and NIKHEF. At JLab, Dr. Ent has been responsible for the commissioning of the Hall C experimental apparatus, including the design and construction of various slit systems and setting up several tools to understand the optics of spectrometers.
Over the past decade, Dr. Ent's research interest has been the development of programs to understand the dual description of electron-nucleus scattering with quark and nucleon degrees of freedom. He has spearheaded the research thrust of the quark-hadron duality phenomenon that prescribes the transition between regions where quarks act as if free and where quark confinement plays a large role. In a nucleus, his research focuses on how a proton bound in a nucleus changes structure due to its underlying quark-gluon structure.
Dr. Ent earned his B.S. in 1985 and his Ph.D. in 1989 at the Free University Amsterdam/NIKHEF. He has authored more than 80 papers published in refereed journals. Throughout his career, Dr. Ent has served on organizing committees for many different workshops/conferences, on review committees, and as spokesperson for several experiments. He is the contact person for the ELIC project and a member of the eRHIC steering committee. He has taught at Hampton University, MIT and the Free University of Amsterdam. He has also served as faculty and/or thesis advisor to many up-and-coming physicists, including undergraduate and graduate students. In addition, Dr. Ent and his collaborators have been awarded nearly $6 million in grants for physics research by the National Science Foundation.
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updated September 28, 2004