Hello! My name is Jules van Irsel.

I'd like to welcome you to my online portfolio and share some of my personal and professional endeavors; I am a plasma physicist, rocket instrument scientist, and former mechanical design engineer, and on July 8, 2025, I successfully defended my Ph.D. dissertation. My research covers electric current connectivity in the upper atmosphere surrounding aurorae using 3D, multi-fluid, magnetohydrodynamic simulations. By applying innovative methodologies, I utilize a wealth of heterogeneous, multi-platform measurements and state-of-the-art data reduction techniques, modeling, and visualizations to provide cutting-edge science.

Driven by intellectual curiosity, I actively cultivate a diverse range of skills. Having over six years of hands-on experience in laboratory plasma testing of ion flow rocket instruments, I have developed strong practical expertise. I am adept in mechanical and electrical engineering, manufacturing, testing, and computer-aided design. In addition, I am also proficient in the core branches of physics, multilingual computational physics (Python, MATLAB, Fortran, etc.), and large-scale data management. Overall, I thrive in community-driven teams motivated by a common goal, and I pride myself on my ability to communicate ideas to diverse audiences with varying levels of expertise.

Aside from my goals as a plasma physicist, I am also a board member at Van Irsel Medical. My brother asked me to join him as co-founder back in February, 2025, and I gladly agreed. I provide technical consultation—algorithms, software, machine learning, radiation physics—perfectly complementing his limitless innovation and creativity. This promising MedTech start-up addresses a critical void in radiotherapy outcomes: system-level, fully-passive patient positioning.

I built this website from scratch to showcase and expand upon my curriculum vitae, highlighting my accomplishments and experiences in greater detail. Additionally, this project has allowed me to learn and apply HTML, CSS, and JavaScript, turning the process into an exciting and rewarding learning experience!

Thank you for your time and interest in my work!

Professional & Research Highlights:

Multi-Fluid Plasma Modeling

Throughout my Ph.D. program, I have worked extensively with state-of-the-art 3D ionospheric simulations provided by the Geospace Environment Model of Ion-Neutral Interactions (GEMINI), utilizing the NASA Advanced Supercomputing (NAS) Division at Ames Research Center.

Originally developed by Matt Zettergren, Joshua Semeter, and Jonathan Snively, GEMINI continues to evolve. At its core, GEMINI is a multi-fluid, quasi-electrostatic model that tracks key state parameters—such as pressure and temperature—of electrons and six different ion species as they respond to electromagnetic, gravitational, and fluid forces. You can learn more about my contributions to this evolving model!

A significant portion of this research, spanning the past two years of my Ph.D., has been funded by NASA's Future Investigators in NASA Earth and Space Science and Technology (FINESST) 2022 solicitation. Feel free to read my proposal and learn more!

NASA MIDEX Proposal

During the first two years of my Ph.D. program, I contributed to both the Science and Science Implementation sections of the Phase A Concept Study Report for the 2019 Heliophysics Medium-Class Explorer (MIDEX) proposal for the Auroral Reconstruction CubeSwarm (ARCS) mission.

Through an array of 32 CubeSats (shown here in red) and 32 ground-based, all-sky observatories spanning most of Alaska (shown in green), this proposed mission aims to uncover the physics behind temporal and spatial gradients pertaining to auroral ionospheric plasma. These gradients are impossible to untangle with one-dimensional data tracks provided from a single, or even a few, spacecraft.

My contributions include providing a catalog of Observing System Simulation Experiments (OSSE) using GEMINI to verify measurement tolerances and proper redundancies, as well as developing plasma flow inversion techniques and visualizations that supported orbit selection and other mission decisions.

Learn more about my work on other proposals, including NASA's 2022 Heliophysics Low Cost Access to Space GNEISS sounding rocket proposal or my FINESST proposal for graduate funding.

Sounding Rockets

Beyond my Ph.D. research, I conduct testing and fieldwork to support various sounding rocket instruments. Two such instruments I work with are the rocket Miniature Plasma Imager (rMPI) developed by Johnathan Burchill et al., and the Petite Ion Probes (PIP) developed by Kristina Lynch et al.

Both these instruments are designed to measure characteristics of space plasma by analyzing ion velocity distributions. The rMPI takes 2D snapshots of these distributions using its wide-angle aperture, while the PIPs leverage their compact size, low power consumption, and affordability to capture complete ion distributions through multiple-unit deployment.

My work with these instruments includes electronics, hardware, vibration, ultra-high vacuum, plasma, and general system testing, as well as integration of these instrument systems into various sounding rocket payloads. Altogether, I have spent several months conducting fieldwork at three launch sites: NASA's Wallops Flight Facility (WFF) in Virginia, the Poker Flat Research Range (PFRR) in Alaska, and the Svalbard Rocket Range (SvalRak) in Ny-Ålesund.

One of my most incredible journeys so far was to the remote research town of Ny-Ålesund situated at a latitude of nearly 79° North on a Norwegian archipelago called Svalbard. Have a look at some photos I took along the way!

This image captures the launch of the Loss through Auroral Microburst Pulsations (LAMP) sounding rocket at 2:27 AM AKST on March 5, 2022. I integrated a total of 8 PIPs onto this rocket! Image credit: Justin Hartney.

Computer Aided Design

Prior to starting graduate school, I worked as an instrument design and assembly assistant at the University of Calgary in Alberta. I took on the redesign of the rocket Miniature Plasma Imager (rMPI), originally developed by Johnathan Burchill.

The rMPI analyzes space plasma characteristics by measuring 2D ion velocity distributions. It does this by sequentially increasing the voltage of a hemispherical anode which brakes the ions and guides them onto a 1D electron charge-coupled device (CCD), effectively scanning the different energies of the ions. Herein lies the main innovation of this instrument allowing it to be smaller, more affordable, and use less power compared to similar designs.

Shown here is the result of my redesign of the rMPI. This new rMPI is significantly smaller, uses less power still, has improved circuit board design, and the design surrounding the hemispherical anode has significant upgrades. On top of that, it includes baffling in the aperture, which improves the angular resolution of the instrument, and overall has significantly improved manufacturability. Unfortunately, due to confidentiality agreements, I am unable to share specific details or designs.

Several of these redesigned rMPIs have successfully flown on NASA sounding rockets including the Cusp Region EXperiment (C-REX) 2 and the Ion-Neutral Coupling during Active Aurora (INCAA) missions.