Nuclear fusion propulsion

Inertial Confinement Fusion
Direct fusion drive
Pulsed fission fusion (PuFF)
Z-pinch Fusion
A version of the Vista Inertial Confinement Fusion vehicle as proposed by C.D. Orth. Multiple lasers have just ignited a fusion fuel pellet

Inertial Confinement Fusion was one of the first type of fusion propulsion seriously proposed for deep space and even Interstellar missions. An initial theorethical model was proposed by Friedwardt Winterberg in the seventies. A British Interplanetary Society team, led by Alan Bond, did a detailled conceptual version of the idea in the mid eighties. Their Daedalus project report presented Daedalus, a two stage Interstellar vehicle capabe of travelling at 14% of the speed of light. In the US, Advanced Propulsion Committee member C.D. Orth proposed the Vista design in the late nineties and early 2000, with an inital design created for rapid Mars travel. Some papers explored more advanced versions that might be used for Interstallar travel.

Overview of the VISTA Spacecraft Concept Powered by Inertial Confinement FusionC.D. Orth2000

The Direct Fusion Drive (AKA Starfire) is a type of fusion drive being developed by Princeton Satellite systems for the future rapid exploration of the solar system. AIAA abd NFFPTC member Stephane Thomas helped develop this technology.

A Starfire powered vehicle for Mars access (Credit: Princeton Satellite Systems)
A Fusion-Propelled Transportation System to ProduceTerrestrial Power Using Helium-3 From UranusStephanie Thomas
Michael Paluszek
2023
Starfire: Fusion Power for Human Mars MissionsLayla M. Aboud
Michael Paluszek
Joyce Mo
Sarah Fry
2025
Nuclear fusion powered Titan AircraftMichael Paluszek
Annie Price
Zoe Koniaris
Christopher Galea
Stephanie Thomas
Samuel Cohen
Rachel Stutz
2023

Link to most papers about the Direct Fusion Drive can be found here.

Nuclear fusion powered Titan Aircraft, from the 2023 paper

The pulsed Fusion Fission Drive is a drive combining fusion with a fission reaction in order to create a high impulse drive.

Developing the Pulsed Fission-Fusion (PuFF) EngineRobert B. Adams
Jason Cassibry
Leo Fabisinski
Geoffrey Statham
2014
Pulsed fusion fission NIAC phase 1 reportRobert B. Adams, Ph.D.
Jason Cassibry, Ph.D.
David E. Bradley
Leo Fabisinski
Geoffrey Statham, D.Phil.
2018
The Pulsed Fission-Fusion (PuFF) Engine:
Development Status
Robert B. Adams, Ph.D.2020
Continued Development of the Pulsed Magnetic Nozzle for the Pulsed Fission Fusion (PuFF) VehicleRobert B. Adams, Ph.D.
NathanM. Schilling
Jason T. Cassibry
2021
Design of Z-pinch and Dense Plasma Focus Powered VehiclesTara Polsgrove
Sharon Fincher,
Robert B. Adams
Jason Cassibry
Ross Cortez
Matthew Turner
Daphne Maples
Janie N. Miernik
Geoffrey N. Statham
Leo Fabisinski
John Santarius
Tom Percy
2011

The flow stabilized Z-pinch fusion drive is a derivative of the work of Uri Shumlak on Flow Stabilized Z-pinch fusion. This technology is beeing expored at this time as a power source for fusion reactors by Zap Energy

A Flow Stabilized Z-Pinch Fusion Space ThrusterUri Schumak2004