Full energy accounting
Every unit of fusion energy is assigned to a destination: exhaust, neutron absorption, radiation or rejected heat. No losses are hidden in assumed efficiencies.
Research directions
Four workstreams, one question: is pulsed fusion propulsion viable?
Each workstream addresses an open problem that decides the answer, and separates established physics from working assumptions.
- 01D–T energy balanceNeutrons carry most of the D–T fusion energy and cannot be directed magnetically. We study how much of it a propellant liner can recover.Core problemLearn more
- 02D–D cascadeAn advanced fuel cycle with abundant fuel and a larger charged-particle fraction, constrained by demanding ignition conditionsAdvanced fuel cycleLearn more
- 03Checking against experimentsPublished measurements from PLX and NIF used to constrain liner formation and per-shot fusion yieldValidationLearn more
- 04Computing programEnergy-balance models today; GPU ensembles of plasma-jet implosions and neutron transport in the next phaseSimulation roadmapLearn more
Architecture
A single pulsed engine with a superconducting magnetic nozzle.
Each pulse compresses a fuel target to fusion conditions. Charged reaction products and heated propellant are expelled through the magnetic nozzle with no material contact. Compare the two fuel cycles under study.
Ignition demonstratedThe lowest-threshold fusion reaction; target ignition has been achieved at NIFestablished
Neutron-dominated outputMost of the energy is released as neutrons, which a magnetic field cannot directmain challenge
Tritium supplyTritium is scarce and must be bred, typically from lithiumconstraint
Open questionThe fraction of neutron energy the propellant can recover and transfer to the exhaustunder study
Abundant fuelDeuterium is extracted from water; no external tritium supply is requiredadvantage
Higher charged fractionWith full burn-up, charged products carry a larger share of the energy than in D–Tassumes full burn-up
Demanding ignitionRequires substantially higher temperature and compressionmain challenge
Open questionThe conditions under which the cascade reaches sufficient burn-upnot yet shown
Methodology
A result is only as credible as the assumptions behind it.
Explicit assumptions
Each simplification is documented alongside the result that depends on it.
Experimental validation
Models are benchmarked against measurements from operating facilities.
Reproducibility
Methods and inputs are documented so that independent researchers can reproduce the results.
Approach
We address the decisive risks first and publish what we find.
01
Critical risks first
Neutron energy recovery and D–D ignition are studied before secondary design questions.
02
Traceable assumptions
Every result can be traced to the inputs and simplifications it rests on.
03
Benchmarked against facilities
Plasma-jet merging is benchmarked against PLX; per-shot D–T yield against NIF.
04
Open technical notes
Findings are published with their methods after internal and external review.
Founder
Igor Srebnitskiy
Founder, Star Truck Space
Igor founded Star Truck Space to pursue fast interplanetary transport through fusion propulsion. A long-time technologist with deep roots in engineering and computing, he leads the program’s research direction and modeling work.
The program is seeking a plasma physics advisor. Get in touch
Partnerships
We are seeking partners for the next research phase.
SPRINT is currently self-funded and at an early research stage. Partnerships will fund GPU-based simulation, scientific advisory work and the publication of open technical notes.
01
Compute
GPU time and cloud credits for plasma-jet ensembles and neutron-transport simulation.
02
Research collaboration
Plasma physics groups to review the models and co-author technical notes.
03
Grants and investment
Funding for the simulation phase and a small core research team.