Advanced Photon Source

An Office of Science National User Facility

ASD Director Zholents Named Argonne Distinguished Fellow

Alexander (Sasha) Zholents, Director of the Accelerator Systems Division in the Argonne Photon Sciences Directorate (PSC) and Advanced Photon Source (APS); has been chosen as an Argonne Distinguished Fellow, the Laboratory’s highest scientific and engineering rank.


To be named an Argonne Distinguished Fellow is an achievement on par with receiving an endowed chair at a top-ranked university. Approximately three percent of the research staff share this title, which requires sustained outstanding scientific and engineering research and can also be associated with outstanding technical leadership of major, complex, high-priority projects.


Sasha Zholents oversees the performance of the APS accelerators, upgrades to the accelerator systems, and the Division’s research and development efforts. He has a Ph.D. in experimental high-energy physics from the Budker Institute of Nuclear Physics in Novosibirsk, Russia.


Before joining Argonne in 2010, Zholents was deeply involved in the design and commissioning of high-luminosity electron-positron colliders, third-generation light sources, and the world’s first source of femtosecond x-ray pulses. He also helped design the world’s first seeded x-ray free electron laser (FEL). He proposed many innovative accelerator techniques including optical stochastic cooling, generation of picosecond x-ray pulses at synchrotrons, enhanced self-amplified spontaneous emission for FELs, and generation of attosecond x-ray pulses.


At Argonne, Zholents applied his deep knowledge of accelerators to the operational effectiveness of the APS. Under his leadership, the Accelerator Systems Division has improved accelerator reliability and availability and advanced the state-of-the-art in development of innovative insertion devices, x-ray beam position monitors, and development of new approaches in beam orbit stability. Zholents has also worked together with scientists from the Argonne Wakefield Accelerator Facility and the Argonne Tandem Linear Accelerator System on several successful projects.


Zholents is a Senior Scientist of the Russian Academy of Sciences and is a Fellow of the American Physical Society. He received the Klaus Halbach award for innovative instrumentation.