Explanipedia

Qualification of a pulsed, millinewton class metal plasma thruster for broad mission applications Open

John Frankovich, Mahadevan Krishnan, Jon Mackey, Hani Kamhawi · 2025

In the field of low power (< 100W) electric propulsion, all thruster options demand significant trade-offs between operating parameters, systemic simplicity and scalable cost. With many systems on the market there are concerns with reliabi…

12-kW advanced electric propulsion system hall current thruster qualification and production status Open

Rohit Shastry, Hani Kamhawi, Jason D. Frieman, George C. Soulas, Timothy Gray , et al. · 2025

Initial developments by the National Aeronautics and Space Administration (NASA) of a 12-kW-class Hall thruster began with maturation of the Hall Effect Rocket with Magnetic Shielding, which was then transitioned to industry via the Advanc…

Variation in Ion Acceleration Characteristics of the HERMeS Hall Thruster During Magnetic Optimization Open

Wensheng Huang, Hani Kamhawi, Daniel A. Herman · 2019

To reduce design risks for future magnetically shielded Hall thrusters, a test was performed on the HERMeS to obtain data for optimizing the effect of magnetic shielding. As a part of this test, laser-induced fluorescence velocimetry was u…

Completion of the Long Duration Wear Test of the NASA HERMeS Hall Thruster Open

Jason D. Frieman, Hani Kamhawi, Peter Y. Peterson, Daniel A. Herman, James H. Gilland , et al. · 2019

The NASA Hall Effect Rocket with Magnetic Shielding (HERMeS) 12.5-kW Hall thruster has been the subject of extensive technology maturation by NASA GRC and JPL in preparation for development into a flight propulsion system. As part of this …

Slow Crack Growth of Boron Nitrides for Electric Propulsion Components Open

Jonathan A. Salem, Jon Mackey, Hani Kamhawi · 2019

The Deep Space Gateway requires thruster systems to maintain spatial position. One control system being considered involves Hall thrusters. Historically, Hall thruster discharge channels have used several grades of hot-pressed hexagonal bo…

In-situ Diagnostic for Assessing Hall Thruster Wear Open

Jason D. Frieman, Drew M. Ahern, George Williams, Jon Mackey, Thomas Haag , et al. · 2018

The design of a new diagnostic to measure the net erosion of Hall thruster surfaces is presented. This diagnostic consists of a pair of optical non-contact profilometer pens mounted to a set of motion stages, which can interrogate the surf…

Iodine Hall-Effect Electric Propulsion System Research, Development, and System Durability Demonstration Open

Gabriel Benavides, Hani Kamhawi, Jon Mackey, Thomas Haag, Gustavo Costa · 2018

This paper reviews recent iodine electric propulsion research and development activities at the NASA Glenn Research Center (GRC). Activities included (i) investigation of the iodine compatibility of BaO-CaO-Al2O3 impregnated tungsten hollo…

Long Duration Wear Test of the NASA HERMeS Hall Thruster Open

Jason D. Frieman, Peter Y. Peterson, James H. Gilland, Hani Kamhawi, George Williams , et al. · 2018

The NASA Hall Effect Rocket with Magnetic Shielding (HERMeS) 12.5-kW Hall thruster is the subject of extensive technology maturation by NASA GRC and JPL in preparation for development into a flight propulsion system. As part of this on-goi…

Optimization of the Magnetic Field Topology in the Hall Effect Rocket with Magnetic Shielding Open

Hani Kamhawi, Wensheng Huang, Ioannis G. Mikellides · 2018

NASA's Hall Effect Rocket with Magnetic Shielding (HERMeS) 12.5kW Technology Demonstration Unit-1 (TDU-1) has been the subject of extensive technology maturation in preparation for flight system development. The TDU-1 thruster implements a…

Uncertainty in Inverted Pendulum Thrust Measurements Open

Jon Mackey, Scott J. Hall, Thomas Haag, Peter Y. Peterson, Hani Kamhawi · 2018

An uncertainty analysis of a common configuration of electric propulsion thrust stand is presented. The analysis applies to inverted pendulum thrust stands operating in a null-coil configuration with in-situ calibration. Several sources of…

Demonstration of a 600 Watt Hybrid Iodine-Xenon Electric Propulsion System Open

Gabriel Benavides, Hani Kamhawi, Jon Mackey, Thomas Haag · 2018

This paper reviews recent iodine compatible electric propulsion technologies evaluated at the NASA Glenn Research Center. The work culminated in a 1,174-hour hybrid iodine-xenon propulsion system durability demonstration (iodine fed thrust…

Reconfiguration of NASA GRC's Vacuum Facility 6 for Testing of Advanced Electric Propulsion System (AEPS) Hardware Open

Peter Y. Peterson, Hani Kamhawi, Wensheng Huang, John Yim, Thomas Haag , et al. · 2016

The NASA Hall Effect Rocket with Magnetic Shielding (HERMeS) 12.5 kilowatt Hall thruster has been the subject of extensive technology maturation in preparation for development into a flight propulsion system. The HERMeS thruster is being d…

Integration Tests of the 4 kW-class High Voltage Hall Accelerator Power Processing Unit with the HiVHAc and the SPT-140 Hall Effect Thrusters Open

Hani Kamhawi, Luis Pinero, Thomas Haag, Wensheng Huang, Drew M. Ahern , et al. · 2016

NASAs Science Mission Directorate is sponsoring the development of a 4 kW-class Hall propulsion system for implementation in NASA science and exploration missions. The main components of the system include the High Voltage Hall Accelerator…

Hollow Cathode Assembly Development for the HERMeS Hall Thruster Open

Timothy R. Sarver-Verhey, Hani Kamhawi, Dan M. Goebel, James E. Polk, Peter Y. Peterson , et al. · 2016

To support the operation of the HERMeS 12.5 kW Hall Thruster for NASA's Asteroid Redirect Robotic Mission, hollow cathodes using emitters based on barium oxide impregnate and lanthanum hexaboride are being evaluated through wear-testing, p…

High Throughput 600 Watt Hall Effect Thruster for Space Exploration Open

James Szabo, Bruce Pote, Rachel Tedrake, Surjeet Paintal, Lawrence Byrne , et al. · 2016

A nominal 600-Watt Hall Effect Thruster was developed to propel unmanned space vehicles. Both xenon and iodine compatible versions were demonstrated. With xenon, peak measured thruster efficiency is 46-48% at 600-W, with specific impulse f…

Plasma Oscillation Characterization of NASA’s HERMeS Hall Thruster via High Speed Imaging Open

Wensheng Huang, Hani Kamhawi, Thomas Haag · 2016

For missions beyond low Earth orbit, spacecraft size and mass can be dominated by onboard chemical propulsion systems and propellants that may constitute more than 50 percent of the spacecraft mass. This impact can be substantially reduced…

Hall Thruster Thermal Modeling and Test Data Correlation Open

James L. Myers, Hani Kamhawi, John Yim, Layren Clayman · 2016

The life of Hall Effect thrusters are primarily limited by plasma erosion and thermal related failures. NASA Glenn Research Center (GRC) in cooperation with the Jet Propulsion Laboratory (JPL) have recently completed development of a Hall …

The Ion Propulsion System for the Asteroid Redirect Robotic Mission Open

Daniel A. Herman, Walter Santiago, Hani Kamhawi, James E. Polk, John Snyder , et al. · 2016

The Asteroid Redirect Robotic Mission is a Solar Electric Propulsion Technology Demonstration Mission (ARRM) whose main objectives are to develop and demonstrate a high-power solar electric propulsion capability for the Agency and return a…

Overview of Iodine Propellant Hall Thruster Development Activities at NASA Glenn Research Center Open

Hani Kamhawi, Thomas Haag, Gabriel Benavides, Tyler Hickman, Tim Smith , et al. · 2016

NASA is continuing to invest in advancing Hall thruster technologies for implementation in commercial and government missions. There have been several recent iodine Hall propulsion system development activities performed by the team of the…

Non-Contact Thermal Characterization of NASA's HERMeS Hall Thruster Open

Wensheng Huang, Hani Kamhawi, James L. Meyers, John Yim, Gregory Neff · 2015

The Thermal Characterization Test of NASAs 12.5-kW Hall thruster is being completed. This thruster is being developed to support of a number of potential Solar Electric Propulsion Technology Demonstration Mission concepts, including the As…

The Iodine Satellite (iSat) Project Development Towards Critical Design Review Open

John Dankanich, Derek Calvert, Hani Kamhawi, Tyler Hickman, James Szabo , et al. · 2015

Despite the prevalence of small satellites in recent years, the systems flown to date have very limited propulsion capability. SmallSats are typically secondary payloads and have significant constraints for volume, mass, and power in addit…

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