PhD Students

 Mr. Matthew Marcath

Ph.D Candidate

B.S.E. Nuclear Engineering and Radiological Sciences at the University of Michigan, USA, 2012

Matthew joined the DNNG as a UROP student in Fall 2010 to assist with an active measurement campaign. He graduated with a Bachelors degree in 2012 and then interned at the Los Alamos National Laboratory for the summer of that year. He is now a Ph.D. student with the group.

Projects: Nuclear fission cross-correlations and multiplcities, Monte Carlo code development


Mr. Charles Sosa

charlesPh.D Candidate

M.S.E. Nuclear Engineering and Radiological Sciences at The University of Michigan, USA, 2014

B.E. in Mechanical Engineering at City College of New York (CCNY) with a concentration in Nuclear Engineering, USA, 2011

Charles joined the Detection for Nuclear Nonproliferation Group (DNNG) at the University of Michigan in the fall semester of 2012. He is a recipient of the Consortium for Verification Technology (CVT) Fellowship and the GEM Ph.D. Engineering Fellowship. His thesis work is on the importance of light-collection efficiency in radiation detection systems that use organic scintillators. Charles is especially interested in how the transport of optical photons affect detector performance in three key areas: energy resolution, timing resolution, and particle discrimination. His work involves both optical transport simulations in Geant4 and experimental studies of scintillators and photo sensors of various shapes and sizes.
Charles is pursuing his Ph.D. in Nuclear Engineering at the University of Michigan under the advisement of Dr. Sara A Pozzi. He earned his B.E. in Mechanical Engineering at the City College of New York and his M.S.E in Nuclear Engineering at the University of Michigan.

Projects: Organic scintillator geometry, detector characterization, pulse-shape discrimination


Ms. Ciara Sivels

Ph.D Candidate

M.S.E. Nuclear Engineering and Radiological Sciences at the University of Michigan, USA, 2015

S.B. Nuclear Science and Engineering at the Massachusetts Institute of Technology, USA, 2013

Ciara received the B.S. degree in Nuclear Science and Engineering from MIT in 2013. Her research interests generally include nonproliferation and nuclear forensics techniques. Through the GEM fellowship she has interned at PNNL working on projects focused on treaty verification using beta-gamma coincidence detectors. Her graduate research involves the development and analysis of advanced detector systems for radioxenon measurement.

Projects: Radioxenon detection


Mr. Tony Shin

OLYMPUS DIGITAL CAMERAPh.D. Candidate

B.S.E. Nuclear Engineering and Radiological Sciences at the University of Michigan, USA, 2014

M.S.E. Nuclear Engineering and Radiological Sciences at the University of Michigan, USA, 2015

Tony began his research career with DNNG as a SURE undergraduate student in the Summer of 2012. His first research project involved characterizing the angular distribution of spontaneous fission neutrons in Pu-240. As a Ph. D. candidate, Tony’s research focuses on developing analytic models for fissile mass estimation in a fast-neutron multiplicity counting system. His other work includes alternative digital signal processing techniques for improved pulse shape analysis. 

Projects: Fast-neutron multiplicity counter, pulse-shape discrimination techniques, nuclear fission cross-correlations and multiplcities


Mr. Cameron Miller

OLYMPUS DIGITAL CAMERAPh.D. Candidate

B.S.E. Nuclear Engineering and Radiological Sciences at the University of Michigan, USA, 2013

M.S.E. Nuclear Engineering and Radiological Sciences at the University of Michigan, USA, 2014

Cameron joined the DNNG as a SURE student in the Summer of 2011, supporting the investigation of cyclotron based active interrogation. While earning his master’s degree he designed and constructed a shielding system for the Michigan Ion Beam Laboratory. Cameron’s research currently focuses on characterizing stilbene crystals for dose measurements, and simulations for a novel radiography system.

Projects: Active interrogation, radiation dosimeters


Ms. Jennifer Arthur

OLYMPUS DIGITAL CAMERA Ph.D. Candidate

B.S. Nuclear and Radiological Engineering at the Georgia Institute of Technology, USA, 2014

Jennifer is a third year Ph.D. student in the Department of Nuclear Engineering and Radiological Sciences at the University of Michigan. Jennifer joined DNNG in the fall of 2014, when she began participating in an existing research effort investigating the performance of silicon photomultipliers coupled to organic scintillators. She also briefly researched the position sensing capabilities of double-sided stilbene detectors. Jennifer began collaborating with Los Alamos National Laboratory on advanced critical and subcritical neutron multiplication measurements for nuclear data and computational methods validation in the winter of 2016. She currently works at LANL as a GSRA beginning her thesis work in this area. Jennifer is a Consortium for Nonproliferation Enabling Capabilities Fellow.

Projects: Critical and subcritical measurements, Monte Carlo code development


Mr. William Steinberger

wsteinberger-20161207Ph.D. Pre-candidate

B.S. Nuclear Engineering at Rensselaer Polytechnic Institute, USA, 2016

Will graduated from Rensselaer Polytechnic Institute in 2016 with a B.S. in Nuclear Engineering, and joined DNNG that following summer. His research interests include the development of detector systems using silicon photomultipliers (SiPMs) for nonproliferation applications. Currently, his graduate research involves analyzing combinations SiPMs coupled to organic scintillators with varying algorithms to determine which gives the best timing resolution, and which combination of SiPM and organic scintillator have the best pulse shape discrimination capability.

Projects: Handheld Dual-Particle Imager, silicon photomultipliers


Mr. Stefano Marin

Ph.D. Pre-candidate

B.S. Physics at Rochester Institute of Technology, USA, 2017

Stefano graduated from the Rochester Institute of Technology with a degree in Physics in 2017. His undergraduate research focused on quantum spin squeezing and interaction of electromagnetic fields with molecules. His graduate research interest include the physics of fission processes and the analysis of experimental data.

Projects: Nuclear fission cross-correlations and multiplicities


Mr. Christopher Meert

Ph.D. Pre-candidate

B.S.E. Nuclear Engineering at Purdue University, USA, 2017

Chris joined DNNG in Fall 2017. He has previous experience in commercial nuclear power as a co-op student with Dominion Resources, and has performed undergraduate research projects pertaining to radon detection and tensioned metastable fluid detectors. His current research interests include active interrogation systems, nuclear non-proliferation, and imaging devices.

Projects: Handheld Dual-Particle Imager, Active interrogation