The U.S. Naval Research Laboratory (NRL) Spacecraft Propulsion Section, part of the Spacecraft Engineering Division, invites highly qualified candidates to engage in advanced research into Ionic Liquid Ion Source (ILIS) electrosprays for electric propulsion of micro and nanosatellites. The proposed research will focus on the characterization of ionic liquid fragmentation dynamics within the acceleration region of electrospray thrusters, a critical factor affecting thrust efficiency, system longevity, and spacecraft interactions. The NRL Spacecraft Propulsion Section works in close collaboration with the Plasma Physics Division, providing a multidisciplinary environment for cutting-edge propulsion research.

This position will support research efforts to characterize ionic liquid fragmentation in high-strength electric fields (~109 V/m) using state-of-the-art diagnostic methods and simulations. The selected candidate will explore the fragmentation effects of ionic liquids such as EMI-BF4 and EMI-Im. The research will employ advanced mass spectrometry techniques and microscopy diagnostics to gain insight into ion beam composition and energy distribution. Additionally, the candidate will compare computational simulations against experimental data to inform performance predictions and hardware design improvements.

A successful candidate should have experience in electric propulsion systems and advanced plasma diagnostics. Familiarity with electrospray thruster technology, ion beam dynamics, and experimental characterization techniques is highly desirable. The candidate will also be expected to develop new experimental methods to improve the resolution and accuracy of current diagnostics. Prior experience with advanced manufacturing techniques and CAD tools for experimental apparatus design is beneficial. Experience with computational tools, such as molecular dynamics, particle-in-cell, or Bayesian inference are optional, but advantageous.

The candidate will work closely with NRL researchers in both the Spacecraft Engineering and Plasma Physics Divisions. Facilities include high-vacuum chambers tailored for electrospray and plasma diagnostic experiments, material characterization equipment, an array of plasma diagnostic tools such as Faraday cups, retarding potential analyzers, time-of-flight or quadrupole mass spectrometers, high-power microscopes, and access to Department of Defense (DoD) High-Performance Computing (HPC) resources for simulation work. This research aims to significantly enhance the understanding and predictive capability of electrospray thruster performance, ultimately contributing to the development of scalable, efficient electric propulsion systems for small satellite platforms.

key words

Electrospray; Ionic Liquid Ion Source; Space; Spacecraft; Propulsion; Diagnostics; Experimental; Design; Test; Vacuum; Mass Spectrometry

Citizenship:  Open to U.S. citizens and permanent residents

Level:  Open to Postdoctoral applicants