People

Lori Roller

Lori Roller

Title/Position
Quality Assurance Manager
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Lori Roller is the Quality Assurance Manager for the Department of Physics and Astronomy and has the responsibility for determining the effectiveness of the Quality Management System (QMS) process and controls system for ISO 9001 and is responsible for developing, implementing, and maintaining quality standards, methods, instructions and planning on spaceflight projects and service centers. Her role is to facilitate the inspection and provide technical oversight to the manufacturing build and testing on mechanical, electronic components, assemblies, and products.
Suranga Ruhunusiri

Suranga Ruhunusiri, Ph.D.

Title/Position
Associate Research Scientist/Engineer
Suranga’s research interests include building detectors to characterize charged particles in planetary plasma environments, applying machine learning methods for characterization of planetary plasma environments, and investigating plasma turbulence in planetary and cometary environments.
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Himani Saraswat

Title/Position
Graduate Research Assistant
Graduate Student Advisory Committee Member
Himani Saraswat is interested in Condensed Matter and Material Physics. She will be working with Prof. Ravitej Uppu and Prof. Thomas Folland on the Quantum dots which involve characterization and fabrication of semiconductor materials.
Rhyan Sawyer

Rhyan Sawyer, Ph.D.

Title/Position
Postdoctoral Research Scholar
 

Ianos Schmidt

Title/Position
Senior Engineering Associate
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Katrina Schrock

Title/Position
Graduate Research and Teaching Assistant
Katrina Schrock’s research interests cover the vast field of optics, with a focus of LEDs and laser measurements.  She has worked with Dr. John Prineas on the improvement of infrared LEDs.
John W. Schweitzer

John Schweitzer, Ph.D.

Title/Position
Professor Emeritus
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John W. Schweitzer is a Professor Emeritus in the Physics and Astronomy Department at the University of Iowa.
Jack Scudder

Jack Scudder, Ph.D.

Title/Position
Professor Emeritus
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Jack D. Scudder is a Professor in the Physics and Astronomy Department at the University of Iowa. His research interests include space plasma physics.
 

Sercan Sen

Title/Position
Research Scientist/Engineer
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Andrea Shaevitz

Title/Position
Senior Financial Analyst
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Punit Sharma

Title/Position
Graduate Research Assistant
Punit is working on the High Luminosity upgrade of the Inner Tracker detector of the ATLAS experiment currently stationed at the Brookhaven National Lab. He also works on the exotic analysis based on the 2-Higgs doublet model where the pseudoscalar Higgs decays into the heavy CP even neutral Higgs and a Z boson using the run-2 data from the ATLAS experiment.  Punit got his bachelor's and master's degrees from IIT Kanpur. His master's project was on the quantum entanglement in the holographic conformal field theories.
David Sheets

David Sheets

Title/Position
Principal Engineer
David is an engineer with both electrical / software design and systems engineering experience. He is currently working as the systems engineer for the TRACERS ACE instrument and cognizant for several of the subsystems thereof.
 

Sapna Shekhar, Ph.D.

Title/Position
Postdoctoral Research Scholar
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Han-Wen Shen, Ph.D.

Title/Position
Postdoctoral Research Scholar
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Han-Wen is interested in conducting space physics research with satellite and ground-based observations. His current research focuses on exploring the plasma dynamics around the Lunar environment.
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Yueguang Shi

Title/Position
Graduate Research Assistant
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Yueguang Shi is interested in studying computational methods, especially first principle approaches to solid state systems. He is working with Dr. Flatté studying magnetic materials like V(TCNE)2 using density functional theory (DFT) approaches.
Kristine Sigsbee

Kristine Sigsbee, Ph.D.

Title/Position
Associate Research Scientist/Engineer
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Kristine investigates challenging questions in heliophysics about Earth’s magnetosphere, space weather, geomagnetic storms, and the Van Allen radiation belts.
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Daniel Simons

Title/Position
Graduate Research Assistant
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Daniel Simons tests different models that describe the scattering or decay processes of particles and compares with experimental data to see which model looks most like the data. He was accepted into the Universities Research Association's Visiting Scholars Program to travel to the Fermi National Laboratory throughout the 2021-2022 school year to work with researchers there and to study the scattering of neutrinos off nucleons.
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Joe Sink, Ph.D.

Title/Position
Postdoctoral Research Scholar
Joe Sink is working with Dr. Craig Pryor and is interested in modeling the electronic properties of novel Solid-State devices using theoretical models such as Tight-Binding and DFT. His current research is directed towards understanding the unique properties of wurtzite and zinc blende nanowire heterostructures.
Frederick Skiff

Frederick N. Skiff, Ph.D.

Title/Position
Professor
Phone
Frederick N. Skiff is a Professor in the Physics and Astronomy Department at the University of Iowa. His research interests include laser spectroscopy and plasma physics.
Steven R. Spangler

Steven Spangler, Ph.D.

Title/Position
Professor Emeritus
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Steven R. Spangler's research interests include radio astronomy, plasma astrophysics and space plasma physics.
Photo of Kevin Steele

Kevin Steele

Title/Position
Application Programmer/Analyst
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Kory Stiffler

Kory Stiffler, Ph.D.

Title/Position
Visiting Assistant Professor
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Kory Stiffler is a theoretical physicist with research interests in supersymmetry, black hole physics, cosmology, and string theory. for black hole physics and cosmology research, Kory focuses on Thomas-Whitehead gravity developed by Professor Vincent G. J. Rodgers (University of Iowa). In supersymmetry research, Kory focuses on adinkras: colorful diagrams encoding supersymmetry. To aid in adinkra research for students and colleagues, as owner of the GitHub organization HEPTHools, Kory along with several student members has developed the adinkra.m mathematica package.
Dale Stille

Dale Stille

Title/Position
Instructional Services Specialist
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Dale has been with the University and the Department of Physics and Astronomy as the Instructional Resource Specialist for 35 years. He holds a Bachelor of Science in Chemistry from Buena Vista University in Storm Lake Iowa, and a Master’s degree in Chemistry from the University of Iowa. He is a member of the American Association of Physics Teachers (AAPT), American Physical Society (APS), and the Physics Instructional Resource Association (PIRA). He is also a Co-Coordinator of the Departments “Hawk-Eyes on Science”, and “Hawkeyes in Space” outreach programs.
John Sunderland

John Sunderland, Ph.D.

Title/Position
Associate Professor
Director, PET Imaging Center
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John J. Sunderland is Professor of Radiology in the Division of Nuclear Medicine at the University of Iowa, and has a secondary appointment in the Department of Physics and Astronomy. He is also Director of the PET Imaging Center and is a Professor of Radiation Oncology. His research interests include medical physics.
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Dustin Swarm

Title/Position
Graduate Research Assistant
Graduate Student Mentor
Dustin Swarm is interested in high energy astrophysics and the application of machine learning in astronomy. He is currently working with Prof. Casey DeRoo studying X-ray sources in the Galactic center found using an outlier detection algorithm.
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Jared Termini

Title/Position
Graduate Research Assistant
Jared Termini is interested in astronomical instrumentation and detector design. He is currently working with Professor Keri Hoadley on the Faint Intergalactic Medium Redshifted Emission Balloon (FIREBall) mission.
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Ashok Tiwari

Title/Position
Graduate Research Assistant
Ashok Tiwari is focusing his research on medical physics applications. His research concentrates on dosimetry post radiopharmaceutical therapy and quantitative imaging in nuclear medicine. He recently explored the dosimetry of beta-emitting radionuclides by employing the Monte Carlo simulations and performed its experimental validation using Radiochromic films.
 

Toby Tompkins

Title/Position
Engineering Coordinator
Fatima Toor

Fatima Toor, Ph.D.

Title/Position
Associate Professor
Phone
Fatima Toor is an Associate Professor in the Electrical and Computer Engineering Department at the University of Iowa and has a secondary appointment in the Department of Physics and Astronomy. She is a researcher at the Iowa Technology Institute, Iowa-CREATES and MATFab Facility.
Riley Troyer

Riley Troyer

Title/Position
Graduate Research Assistant
Originally from Fairbanks, Alaska, Riley has been fascinated by the northern lights (aurora) for his entire life and is currently studying a dim but dynamic type called pulsating aurora. He is also interested in science policy and helped create Connecting Science to Society, a student science policy and communication organization. Riley works for Dr. Allison Jaynes and is funded under a NASA FINESST grant.