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Hire Dr. Jeffrey C.

United States

USD 125 /hr

Scientific Consultant | Physics · Chemistry · Biology | Simulation & Data Analysis Expert | Geant4 · CP2K · AMBER

Profile Summary

I am a physicist with a PhD in experimental nuclear and particle physics, with extensive experience in radiation detection, simulation, and scientific computing. My work spans the design, calibration, and deployment of advanced instruments for measuring atmospheric and space-based radiation, with applications in airborne, satellite, and ground-based platforms. I’ve worked at national laboratories and with the Department of Defense on projects involving radiation measurement, detector development, and environmental exposure assessments. I also have expertise in computational modeling and simulation using tools such as Geant4, AMBER, and CP2K, applied to problems ranging from particle transport to biomolecular systems. I offer consulting in experimental design, simulation strategy, data interpretation, and technical communication across defense, aerospace, and biomedical domains.

Subject Matter Expertise

• ★ Computer Simulation/Computational Modeling
• ★ Earth & Atmospheric Science
• ★ Nuclear Physics
• ☆ Computational Chemistry
• ☆ Computational Biology
• ☆ Biophysics
• ☆ Nuclear Engineering
• ☆ Data Analysis
• ☆ Climate Science
• ☆ Astrophysics
• ☆ Atmospheric Chemistry
• ☆ Particle Physics
• ☆ Nuclear Power
• ☆ Computational Physics
• ☆ Applied Physics
• ☆ X-Ray Technology
• ☆ Python
• ☆ Matlab
• ☆ Tensorflow
• ☆ LaTex
• ☆ Scikit-learn
• ☆ Medical Imaging/Radiology

Services

• Writing
• Research
• Consulting

Writing Technical Writing

Research Feasibility Study, Technology Scouting, Gap Analysis, Scientific and Technical Research, Systematic Literature Review

Consulting Healthcare Consulting, Scientific and Technical Consulting, Regulatory Consulting

Work Experience

Nuclear Physics Fellow

Air Force Institute of Technology

January 2023 - Present

Doctoral Researcher

Santa Cruz Institute for Particle Physics

September 2017 - December 2022

Research Scientist

Los Alamos National Laboratory

January 2022 - August 2022

Education

PhD - Physics

University of California, Santa Cruz

September 2017 - December 2022

B.S. (Physics)

University of Minnesota

January 2015 - May 2017

Certifications

• Certification details not provided.

Publications

JOURNAL ARTICLE

Jeffrey M. Chaffin, Juan J. Manfredi, Gregory S. Bowers, William J. Erwin, James C. Petrosky (2024). High Elevation Radiation Array (HERA) detectors for airborne thunderstorm investigations . Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment.

Jeffrey M. Chaffin, David M. Smith, Jeff Lapierre, Steve Cummer, John Ortberg, Antonio Sunjerga, Amirhossein Mostajabi, Marcos Rubinstein, Farhad Rachidi (2024). Mountaintop Gamma Ray Observations of Three Terrestrial Gamma‐Ray Flashes at the Säntis Tower, Switzerland With Coincident Radio Waveforms . Journal of Geophysical Research: Atmospheres.

Jeffrey Chaffin, John Ortberg, David M. Smith, Masashi Kamogawa, Joseph Dwyer, Gregory Bowers, Jeff Lapierre, Daohong Wang, Ting Wu, Tomoyuki Suzuki (2024). Two Laterally Distant TGFs From Negative Cloud‐To‐Ground Strokes in Uchinada, Japan . Journal of Geophysical Research: Atmospheres.

Jeffrey M. Chaffin, Yunjiao Pu, David M. Smith, Steve Cummer, Michael Splitt (2023). Determining a Lower Limit of Luminosity for the First Satellite Observation of a Reverse Beam Terrestrial Gamma Ray Flash Associated With a Cloud to Ground Lightning Leader . Journal of Geophysical Research: Atmospheres.

Gregory S. Bowers, Xuan‐Min Shao, William Blaine, Brenda Dingus, David M. Smith, Jeff Chaffin, John Ortberg, Hamid K. Rassoul, Cheng Ho, Lukas Nellen, et al.(2021). Fair Weather Neutron Bursts From Photonuclear Reactions by Extensive Air Shower Core Interactions in the Ground and Implications for Terrestrial Gamma‐ray Flash Signatures . Geophysical Research Letters. 48. (6). American Geophysical Union ({AGU})

PREPRINT

Jeffrey Michael Chaffin, David M. Smith, Jeff Lapierre, Steven A. Cummer, John Ortberg, Antonio Sunjerga, Amirhossein Mostajabi, Marcos Rubinstein, Farhad Rachidi (2023). Mountaintop gamma ray observations of three terrestrial gamma-ray flashes at the Santis Tower, Switzerland with coincident radio waveforms .