Artist’s conception of the LISA
mission (image courtesy of the
Jet Propulsion Laboratory)
3D Model of the Busek Colloid
MicroNewton Thruster (CMNT)
Two flight hardware CMNT
clusters delivered to JPL and the
European Space Agency for
integration on Lisa Pathfinder
FIRST FLIGHT ELECTROSPRAY THRUSTER, LISA PATHFINDER (DELIVERED, 2008)
In 2008 Busek delivered to NASA’s JPL eight electrospray thrusters clusters for the NASA/ESA LISA Pathfinder mission,
ST7. This technology demonstration mission has been undertaken to prepare for the Laser Interferometry Space
Antenna (LISA), which is a gravity wave observatory. Albert Einstein predicted the existence of gravitational waves -
ripples in space and time - in 1915, occuring as the result of events such as closely-orbiting binaries, black hole mergers
and the aftermath of the Big Bang.
In order to measure gravity waves, the satellites must be in a completely noise-free environment - even the solar
pressure from the sun must be eliminated. The purpose of the Busek Electrospray Thrusters is to counteract small
(micro-Newton) disturbance forces in a very precise manner (requiring precision on the order of 100 nano-Newtons). The
culmination of a 6-year development effort, with its genesis as a Phase 1 SBIR (JPL), the Electrospray Thruster Clusters
consist of complete systems of thrusters, feed systems, propellant storage, power electronics, and digital control
interface unit.
LISA Pathfinder launched from Kourou in December of 2015 and all electrospray thruster units were successfully
commissions in January 2016, after having been stored, fully fueled for nearly eight years. After reaching Earth-Sun
Lagrange Point 1, the thrusters accumulated an average of 2,500 hours operation each and met 100% of mission goals.
In recognition of this ground-breaking technical effort, Busek received the 2008 paper of the year award by the AIAA
Joint Propulsion Conference Electric Propulsion Technical Committee. The AIAA also awarded Busek a 2017 Electric
Propulsion Outstanding Acheivement Award for the successful flight demonstration of a micro-Newton colloid
electrospray propulsion system on the LISA Pathfinder spacecraft. NASA awarded Busek’s Founder Dr. Vlad Hruby the
Exceptional Public Achievement Medal in 2017 for Busek’s contributions to the successful mission.
The technology and its derivatives have as direction applications in deep-space laser communications, formation-flight,
star-shades and sun-shades, and propulsive ACS.
ST7. This technology demonstration mission has been undertaken to prepare for the Laser Interferometry Space
Antenna (LISA), which is a gravity wave observatory. Albert Einstein predicted the existence of gravitational waves -
ripples in space and time - in 1915, occuring as the result of events such as closely-orbiting binaries, black hole mergers
and the aftermath of the Big Bang.
In order to measure gravity waves, the satellites must be in a completely noise-free environment - even the solar
pressure from the sun must be eliminated. The purpose of the Busek Electrospray Thrusters is to counteract small
(micro-Newton) disturbance forces in a very precise manner (requiring precision on the order of 100 nano-Newtons). The
culmination of a 6-year development effort, with its genesis as a Phase 1 SBIR (JPL), the Electrospray Thruster Clusters
consist of complete systems of thrusters, feed systems, propellant storage, power electronics, and digital control
interface unit.
LISA Pathfinder launched from Kourou in December of 2015 and all electrospray thruster units were successfully
commissions in January 2016, after having been stored, fully fueled for nearly eight years. After reaching Earth-Sun
Lagrange Point 1, the thrusters accumulated an average of 2,500 hours operation each and met 100% of mission goals.
In recognition of this ground-breaking technical effort, Busek received the 2008 paper of the year award by the AIAA
Joint Propulsion Conference Electric Propulsion Technical Committee. The AIAA also awarded Busek a 2017 Electric
Propulsion Outstanding Acheivement Award for the successful flight demonstration of a micro-Newton colloid
electrospray propulsion system on the LISA Pathfinder spacecraft. NASA awarded Busek’s Founder Dr. Vlad Hruby the
Exceptional Public Achievement Medal in 2017 for Busek’s contributions to the successful mission.
The technology and its derivatives have as direction applications in deep-space laser communications, formation-flight,
star-shades and sun-shades, and propulsive ACS.
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