Dan T. Abell

Senior Research Scientist

Principal Research Scientist Dan T. Abell received his BA 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 has also worked 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. Most recently, he has worked on improvements to the accelerator ray-tracing code Zgoubi, and on the magnet design code Radia. Publications>>​

Gerard Andonian
Member of the Board

Gerard Andonian is a physicist working in advanced acceleration concepts and radiation generation. He received his PhD from UCLA, where his thesis work focused on short gain length free-electron laser studies. His current research work is centered on novel wakefield acceleration techniques, including beam-driven dielectric and plasma acceleration, optimization of high-efficiency wakefield generation, and development of cutting-edge beam and radiation diagnostics for high intensity accelerators. As an active member of the community, Gerard has presented his research at workshops and conferences, and has co-authored numerous refereed journal publications. He is well versed in accelerator software and was the first user of RadiaSoft’s Sirepo.

Claudia Behnke

Claudia Behnke is our accountant. She has extensive experience working in accounting and finance, and a thorough understanding of databases and accounting systems. She has worked at Apple Computer in the Financial Services Department where she developed a FileMaker Pro call tracking log used by the US Accounts Receivable group. In Boulder, she implemented multiple Excel templates that automated accounting activities at both Exelis Visual Information Solutions and Zayo Group. She developed FileMaker Pro databases for volunteer organizations (student directories, homeowner directories), and was involved with leading student groups in both Odyssey of the Mind and Math Olympiads. Claudia holds an MBA from Bowling Green State University.

David Bruhwiler RadiaSoft

David L. Bruhwiler
President and CEO

Chairman of the Board

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. Publications>>

Kevin Bruhwiler

Software Engineer (Consultant)

Software Developer Kevin Bruhwiler earned his master’s in computer science at Colorado State University in 2020. His graduate work focused on remote visualizations of voluminous geospatial datasets, and he has published work in the fields of large-scale graph indexing, computer vision, and distributed machine learning. Kevin will begin his PhD studies in the fall of 2021.

Evan Carlin
Senior Software Developer

Senior Software Developer Evan Carlin received a BS in computer science from the University of Puget Sound. After graduation he worked as a consultant on a variety of software projects ranging from a cloud migration for a Fortune 500 bank to building a web app for a streaming TV Service. He then went to work for Google where he focused on customer support data analysis and new tool development.

Stephen Coleman
Research Scientist

Stephen Coleman is a research scientist with experience in neutrino physics at Fermilab and J-PARC in Tokai, Japan. He studied physics at the University of Colorado, and received his PhD from the College of William and Mary, working on muon neutrino oscillations in a muon neutrino beam. He also worked for several years in a biology laboratory on a DARPA-funded research project, studying the dynamics of proteins responding to chemical stimulus.
Nathan Cook RadiaSoft

Nathan Cook
Senior Research Scientist
Group Leader

Research Scientist Nathan Cook is an accelerator physicist with a strong background in a variety of topics, ranging from advanced accelerator concepts to intense beam dynamics to thermionic energy converters. He has published peer-reviewed papers on the subjects of laser driven ion acceleration, RF acceleration, novel algorithms for electrostatic and electromagnetic systems, thermionic emission, 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. Publications>>
Beck Cotter RadiaSoft

Rebecca “Beck” Cotter
Research and HR Administrator

Rebecca “Beck” Cotter is our research and HR administrator. She brings over 10 years of experience in pre-award management and proposal development from both a small business and government program perspective. She has worked extensively with the DOE, NASA, and the USAF to secure funding for earth science and climate related projects. Beck holds a bachelor’s degree in kinesiology from the University of Houston.

Joan Danver RadiaSoft

Joan Danver
Operations Manager

Operations Manager Joan Danver comes to RadiaSoft with a background in project management in a small business setting. She has experience managing government contracted projects requiring extensive filings and oversight. Joan received her BA in biology from Williams College and her MS in biochemistry and cell biology from Stony Brook University, where she investigated the role of microglia in the brain.

Abdou Diaw

Research Scientist (Consultant)

Abdourahmane “Abdou” Diaw is a physicist with expertise in computational and theoretical studies of hot, dense plasmas. Abdou received his B.S. and M.S. in physics  and mathematics from the University of Bordeaux, followed by his Ph.D. in physics from the École Polytechnique, studying laser-driven ion acceleration. He has conducted research at the Max-Planck Institute for Complex Systems, the New Mexico Consortium, and Michigan State University.  Abdou also worked on an Air Force Office of Scientific Research (AFOSR) research project, investigating ultracold neutral plasmas and dynamical density functional theory. In 2017, Abdou joined Los Alamos National Laboratory (LANL) as a postdoc. At LANL, he worked on a variety of subjects including hohlraum physics, transport of non-thermal electrons, atomistic and continuum scales bridging with machine learned solutions.

Jonathan Edelen RadiaSoft

Jonathan Edelen
Senior Research Scientist
Group Leader

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. Jon earned a PhD in accelerator physics from Colorado State University. After completing his PhD, Jon was selected for the prestigious Bardeen Fellowship at Fermilab. While at Fermilab he worked on RF systems for the PIP-II Injector Test, beam dynamics and RF transient effects in the proposed PIP-II accelerator, and thermionic cathode RF guns at the Advanced Photon Source. Currently, Jon is focused on building advanced control algorithms for particle accelerators including solutions involving machine learning. He is also developing improved simulation tools for studying field enhanced thermionic emission in thermionic energy converters. Jonathan has published papers and presented at international conferences on a variety of topics in accelerators. Publications>>

Chris Hall
Research Scientist

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. Publications>>

Jessie Hanson
Marketing Strategist

Jessie Hanson is a graduate of the University of Minnesota, Northern Arizona University, and the University of Denver, studying biology, professional writing, and data science. She’s worked as a science and tech writer with a background in medical laboratory science and data analysis, and has developed a nation-wide nonprofit organization focused on teaching science communication through comedy to STEM-field professionals. She owns five bicycles and is not looking for any feedback on that choice.

Mike Keilman RadiaSoft

Mike Keilman
Senior Software Developer

Senior Software Developer Mike Keilman received his BS cum laude in physics from Oberlin College and his PhD in nuclear physics at the University of Colorado. His thesis experiment, measurement of pion single charge exchange on Deuterium, ran at the Los Alamos Meson Physics Facility using the Neutral Meson Spectrometer. He analyzed the data with tools ranging from Fortran to shell scripting to an obscure language called “HTML.” Thus armed, he shifted to software development in the far-flung realms of herbal medicine and telecommunications, most recently hand-crafting a variety of iOS apps. At RadiaSoft, he builds and maintains web UIs based on the Sirepo framework, supporting back-end software for X-ray optics, particle accelerators, and other applications. Publications>>

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. Publications>>
Alex Murokh
Vice-Chairman of the Board

Alex Murokh, PhD, is an accelerator physicist, entrepreneur, and cofounder of RadiaBeam Technologies. Dr. Murokh received his PhD at UCLA in 2002 for his work on the VISA Free Electron Laser. As a postdoc at UCLA, and later as a RadiaBeam research scientist, he worked on the coherent radiation processes, beam diagnostic techniques, and advanced acceleration methods, and novel light sources. Presently, as a chief technical officer at RadiaBeam, Dr. Murokh is responsible for managing the company research division, advancing the product line, and maintaining and enhancing collaborative relationships with the scientific community in the U.S. and internationally. Dr. Murokh has served as a member of the RadiaSoft Board of Directors since 2015.

Rob Nagler RadiaSoft

Rob Nagler

Member of the Board

CTO Rob Nagler has designed and deployed leading-edge distributed systems for almost 40 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 software products division. He led OLAP development at Olsen & Associates, a pioneer in financial research and analysis. At Tandem Computers 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. Publications>>

Boaz Nash RadiaSoft

Boaz Nash
Research Scientist

Research Scientist Boaz Nash is an accelerator physicist with an expertise in synchrotron light sources. Boaz studied math and physics at Reed College, and received his PhD from Stanford University in physics, studying beam dynamics of electron storage rings. He did his first postdoc at Brookhaven National Lab, working on dynamic aperture and Touschek lifetime calculation and optimization for NSLS-II. Starting in 2009, he worked at the European Synchrotron Radiation Facility in Grenoble, France, on existing ESRF, and design for the upgrade EBS machine. He is particularly interested in bridging the gap between the electron beam dynamics and experiments in the synchrotron light sources worldwide. Publications>>
Ilya Pogorelov RadiaSoft

Ilya Pogorelov
Senior Research Scientist

Senior Research Scientist Ilya Pogorelov is a computational accelerator physicist with over 15 years of experience in the development of scientific software and high-fidelity simulation. He has worked on a number of projects in the areas of relativistic electron cooling, polarized beam transport, free-electron lasers, collective effects in beams, high-order modes in RF structures, non-equilibrium statistical physics, and nonlinear dynamical systems. Ilya’s work has been published in peer-reviewed journals and numerous conference proceedings, and he has been the PI for several DOE SBIR and internal R&D projects. Publications>>

Stephen Webb
Senior Research Scientist
Group Leader

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 20 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. In 2015, the Air Force Office of Scientific Research awarded Stephen one of its prestigious Young Investigator Program (YIP) awards. His project, “High average power electron beams from a novel compact plasma wakefield accelerator,” developed 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. Publications>>