Our Staff

Dan T. Abell

Senior Research Scientist

Dan T. Abell received his B.A. in physics from Swarthmore College in 1982 and his PhD from the University of Maryland at College Park in 1995. Dan is an expert on Hamiltonian methods and symplectic maps, especially with application to beam dynamics in particle accelerators. Early in his career, he developed the codes CREMONA and CTRACK to perform map symplectification and fast symplectic tracking. These codes were later used for tracking studies of the Large Hadron Collider (LHC). Dan helped to design the Spallation Neutron Source, considering the effect of magnet fringe fields on tune spread, the use of octupole magnets to shape the tune footprint, and particle tracking through the injection magnet to explore dumping of stripped electrons. Dan developed a technique for computing generalized gradients for rf cavity fields, used to compute high-order maps. He has worked extensively with the Polymorphic Tracking Code (PTC) and with GPUSPINTRACK, a GPU-accelerated code for fast and accurate tracking and analysis of spin-orbit motion in particle accelerators. Dan is now working on the development and implementation of symplectic algorithms for the efficient simulation of rf cavity beam loading in the presence of multiple high-order modes.

David Bruhwiler

President and CEO

David Bruhwiler has devoted over 25 years to the simulation of experiments and physical systems, including beam and laser-driven plasma accelerators, electron cooling of relativistic heavy ion beams, electron and ion sources, particle tracking and accelerator design and nonlinear dynamical systems. In addition to codeveloping both free and commercial software, and coauthoring more than 30 refereed journal articles, David has managed more than $10M in contracts and grants, and successfully mentored teams of more than 10 scientists, mathematicians and software developers. David is a Fellow of the American Physical Society.

Nathan Cook

Research Scientist

Research Scientist Nathan Cook is an accelerator physicist who has a strong interest in laser driven ion acceleration and related applications in radiation therapy, medical imaging, and accelerator driven systems. He has published papers in peer reviewed journals on the subjects of laser driven ion acceleration, RF acceleration, and ion beam imaging diagnostics, and was an editor of the Pre-Conceptual Design Report for the Ion Rapid Cycling Medical Synchrotron project at Brookhaven National Laboratory. Nathan received his BA in Physics and Mathematics from Williams College and his PhD in Physics from Stony Brook University. His thesis work comprised novel approaches to RF acceleration of carbon ions for a rapid cycling medical synchrotron and laser driven shock acceleration of helium ions from a gas target.

Jonathan Edelen

Associate Research Scientist

Associate Research Scientist Jonathan Edelen is an accelerator physicist with a broad range of experience across the field. He specializes in thermionic cathode guns and space-charge effects in low energy electron beams. Jonathan earned his undergraduate degree from Rensselaer Polytechnic Institute. Following his undergraduate education Jonathan worked at the Naval Surface Warfare Center Carderock Division conducting electromagnetic modeling of submarines and submarine systems. He then earned his PhD in accelerator physics from Colorado State University, where he focused on the design and simulation of a 6 MeV photoinjector and beamline for a THz FEL, as well as contributing to the theory of beam dynamics in thermionic cathode RF guns. After completing his PhD Jonathan was selected for the prestigious Bardeen Fellowship at Fermilab. While at Fermilab he worked on RF systems for the PIP-II Injector Test, electron gun design for nonlinear optics in IOTA, beam dynamics and RF transient effects in the proposed PIP-II accelerator, and thermionic cathode RF guns at the Advanced Photon Source. Jonathan has published papers and presented at international conferences on a variety of topics in accelerators.


Yury Eidelman

Senior Research Scientist

Senior Research Scientist Yury Eidelman is a leading scientist in particle accelerator technology and high energy physics, as well as an expert in the software and hardware of control systems. The Budker Institute of Nuclear Physics awarded Dr. Eidelman his PhD in 1968 and the title of Full Professor in 1996. Since 1999, Dr. Eidelman has worked on a wide variety of projects for Argonne National Laboratory, Brookhaven National Laboratory, Oak Ridge National Laboratory, Fermi National Accelerator Laboratory and Euclid Techlabs LLC. His professional interests include the design and simulation of shielding in high-power accelerator and detector facilities, longitudinal beam dynamics in linear accelerators, database and user interface design for scientific softare, polarized electron beams for colliders, beam dynamics in rings, diagnostics, medical physics, control systems and teaching. He has published over 90 articles on these and other topics.

Chris Hall

Associate Research Scientist

Associate Research Scientist Chris Hall is an expert in the simulation and analysis of collective beam effects in energy recovery linac (ERL) driven free-electron lasers (FEL), with an emphasis on coherent synchrotron radiation (CSR) effects. He developed techniques to mitigate the negative impact of CSR on the electron beam, based on analysis of experimental data from the Jefferson Laboratory ERL driven FEL. Chris received a BS in Physics and Mathematics from Hope College, his MS in Physics from Michigan State University, and his PhD in Electrical Engineering from Colorado State University in 2016.


Rami A. Kishek


Consultant Rami A. Kishek is also Research Professor at the University of Maryland (UMD), where he leads the UMER facility. He has 20 years experience in charged particle dynamics and is an expert on space charge effects, computation, and multipactor, where he made groundbreaking contributions to its theoretical modeling. He has published over 190 scientific papers, delivered 50 invited talks, and has over 1000 citations to his work. Rami has chaired several workshops, most recently the 4th Workshop on the Microbunching Instability in FELs (April, 2012). He has advised or co-advised 11 graduate students and guided the research of dozens more graduate, undergraduate and high school students. Rami teaches regularly at UMD and at the US Particle Accelerator School (USPAS). Rami is a Fellow of the American Physical Society and a Senior Member of IEEE. He was awarded the 2015 USPAS Prize for Achievement in Accelerator Science and Technology: For “groundbreaking work on the theory of multipactor discharge, his contributions to the understanding of physics of space-charge-dominated beams and his excellent mentorship of young scientists.”

Paul Moeller

Principal Software Developer

Principal Software Developer Paul Moeller has developed real-world solutions in a variety of problem domains including finance, graphics, medical billing, and generic user interfaces. Paul holds a BS in Computer Science from Clarke University and an MS in Computer Science from Loyola University.

Rob Nagler


CTO Rob Nagler has designed and deployed leading-edge distributed systems for over 30 years. Rob has written extensively about software, including his book on agile development methods, Extreme Perl. Rob started his career in the Distributed Systems Group at Stanford working with Dr. David Cheriton. At Sun Microsystems, he worked with Eric Schmidt in the telecommunications group. He led OLAP development at Olsen & Associates, a pioneer in financial research and analysis. At Tandem Computers(tm) High Performance Research Center, Rob implemented a multi-platform, distributed architecture based on CORBA and used for internet traffic routing for mobile phone networks. Rob holds a BS in Computer Engineering from the University of California, San Diego and an MS in Computer Engineering from Stanford University.

Stephen Webb

Senior Research Scientist

Senior Research Scientist Stephen Webb is an expert in scientific computing and theoretical plasma and beam physics, with an eye towards the theoretical underpinnings of computational algorithms. He has co-authored over twenty conference proceedings and peer-reviewed journal articles covering the fields of intense ion beams, free-electron lasers, and computational plasma and beam physics. Stephen holds a BS in Physics from Georgia Tech and a PhD in Accelerator Physics from Stony Brook University. The Air Force Office of Scientific Research (AFOSR) has awarded Stephen one of its prestigious 2015 Young Investigator Research Program awards. His project “High average power electron beams from a novel compact plasma wakefield accelerator” will develop fundamentally new algorithms and computational tools to enable the accurate simulation of novel ultra-bright electron beams for a wide variety of scientific, industrial and military applications.