Laurent C. Chapon is the Associate Laboratory Director for PSC and Director of the Advanced Photon Source. 

The Photon Sciences directorate consists of the X-ray Science, APS Accelerator Systems, and APS Engineering Support divisions, which comprise the APS; and the Argonne Accelerator Institute.

The APS provides ultrabright X-rays that researchers use to obtain images of structures and dynamics inside many types of materials, chemical systems, and biological systems. Thousands of scientists each year use the APS to spur pivotal discoveries across almost the entire spectrum of science and technology, from clean energy and biology to geology and engineering.

As part of Argonne’s senior management team, Chapon is leading the APS through a time of extraordinary change. The APS Upgrade project has resulted in a transformed facility that generates X-ray beams up to 500 times brighter than those of the previous APS, providing world-leading capabilities.

Before joining Argonne, Chapon was director of physical sciences at Diamond Light Source in the United Kingdom where he led the scientific strategy in this division and oversaw five of Diamond’s eight science groups. He led groups dedicated to technological advancements in optics, metrology, and detector technology at the facility, and oversaw the Project Office, the User Office, and the Experiment Hall groups. In parallel, Chapon was director of the Diamond-II project, for which he led the development of the upgrade strategy, the science case, and the initial business case.

Prior to his time at Diamond, Chapon was a senior fellow and group leader of crystallography at the Institut Laue-Langevin in Grenoble, France. He also spent nearly a decade at the ISIS Neutron and Muon Source at Rutherford Appleton Laboratory in the United Kingdom, as both an instrument scientist and a group leader of the diffraction and engineering group.

Chapon received his Ph.D. in Materials Science from the Université Montpellier-II, in France. He conducted research on the fundamental and thermoelectric properties of skutterudites using neutron scattering, X-ray diffraction and absorption spectroscopy.  He conducted postdoctoral research at Argonne in 2001 on molecule-based magnets. Chapon has since worked mainly on the structural and magnetic properties of complex transition metal oxides, including multiferroics, as well as probing the exotic states of matter stabilized in frustrated magnetic systems and chiral compounds. He is an expert in magnetic scattering with neutron and X-ray, crystallography and magnetic symmetry.

Chapon received a Prize of the Physical Crystallography Group from the British Crystallography Association in 2008 for his work on multiferroics and magnetic crystallography. He has served in many international review committees for large scale user facilities. He has coauthored more than 140 scientific publications.

Jonathan Lang is the Deputy Associate Laboratory Director for Science and Technology, where he coordinates and collaborates with other Argonne directorates, Argonne leaders, other user facilities in the Department of Energy (DOE) complex and DOE officials on scientific initiatives, AI-driven discovery and other national priorities. He also manages APS’s Laboratory Directed Research and Development (LDRD) portfolio, forges new partnerships with our Collaborative Access Team (CAT) beamlines and plays a central role in overseeing future construction projects and securing new talent to support our research mission.

Previously, Lang was the Director of the X-ray Science Division. While at Argonne, Lang has developed a number of novel synchrotron instruments and methods and applied them to investigations of the interrelationship between the magnetic, electronic, and structural degrees of freedom in condensed matter systems.

Lang has authored or co-authored more than 100 scientific publications.  He holds a Ph.D. degree in Condensed Matter Physics from Iowa State University and a B.S. degree in Physics from University of Nebraska.  Lang serves on a number of advisory committees for synchrotron radiation facilities worldwide.

John P. Quintana is the Deputy Associate Laboratory Director for Operations for Photon Sciences (PSC). In this role, Quintana is integrating technical, fiscal and scientific resources to ensure operational readiness. He focuses on facility readiness, safety and infrastructure sustainment.

Prior to this role, Quintana led PSC’s Mission Readiness Group, spearheading the efforts needed to ensure the Advanced Photon Source (APS) facility is ready to come back online promptly after the APS Upgrade project installation is complete.

Quintana’s contributions to the APS and Argonne span decades. Previously, he served as a senior advisor to the former Energy and Global Security (EGS) directorate and was an APS Engineering Support Division (AES) associate division director, where he was responsible for the groups performing mechanical engineering design and mechanical maintenance, as well as radiation and experimental safety. Quintana also has served as Argonne’s deputy chief operations officer and is currently Argonne’s Accelerator Safety Program Manager.

Before joining Argonne, Quintana spent more than 12 years working at Northwestern University as a research professor and engineer specializing in the design, construction and operation of beamline experimental facilities at the APS.

Quintana holds a doctorate in materials science and engineering from Northwestern University and a bachelor’s degree in mechanical engineering from the University of California at Berkeley.
 

Vadim Sajaev is the Director of the Accelerator Systems Division at the Advanced Photon Source (APS). He supports the continuous improvement in performance, capability, and reliability of the APS. Vadim has done foundational work at the APS since joining Argonne as a postdoc more than two decade ago and more recently has worked closely with the APS Upgrade project team and PSC leaders on the commissioning plan for the upgraded machine. He received his Ph.D. in particle accelerator physics from Budker Institute of Nuclear Physics in Novosibirsk, Russia.

Moises Smart is the Director of the Advanced Photon Source (APS) Engineering Support Division (AES) within the Photon Sciences directorate (PSC) at Argonne National Laboratory (ANL). AES provides a broad range of engineering expertise at APS, supporting cutting edge ANL and Department of Energy (DOE) research. Moises provides innovative, technical, and safe solutions in support of APS's mission to deliver maximum reliability of APS operations for this fourth-generation light source.

Prior to his role in PSC at Argonne, Moises held two key leadership roles at SLAC National Accelerator Laboratory, including chief engineer and director of the Linac Coherent Light Source (LCLS) engineering division. Before working at SLAC, Moises spent nearly two decades at Schlumberger Technology Corporation, where he advanced through several critical roles, including serving as research and technology director for the perforating group.

Stefan Vogt is the Interim Director of the X-ray Science Division, where he oversees a team that develops cutting-edge synchrotron X-ray instrumentation and techniques for addressing the research needs of the U.S. scientific community across a range of physical, materials, chemical, environmental, and life sciences.

Vogt is also Adjunct Associate Professor at the Feinberg School of Medicine at Northwestern University. While at Argonne, he has been an influential driver in developing X-ray fluorescence microscopy, and his key interests lie in hard X-ray microscopy with a focus on methods development as well as the role of trace metals in biology and life sciences. He is deeply involved in hardware, software and methods development related to synchrotron-based X-ray fluorescence element mapping and quantification and has developed and optimized instrumentation for biomedical applications of X-ray microscopy, and in particular trace elemental analysis. He has spearheaded the development of relevant, complementary techniques, such as quantitative differential phase contrast for hard X-ray microscopy.  In collaborative studies he has applied this exciting technology to numerous experiments across different fields.