Segal Energy runs four coupled programs — fusion, geothermal, bio, and resources — on one simulation stack and one rule: return more energy than you spend, and more matter than you consume. The star, the mantle, and the rainforest's own chemistry, engineered into firm, carbon-free electrons.
Fusion taps the gradient inside the nucleus — the star. The world can ignite a plasma; the harder question is whether it can do so again the next day, fueled and grid-connected, without spending more than it makes. That is one instance of the only rule that matters.
The rule generalizes. Geothermal taps the thermal gradient of the planet — the mantle. Bio taps the gradient the sun pours into life — the rainforest's own trick, run at industrial density. Resources closes every loop. Four sources, one discipline: tap it, convert it, sustain it, and never spend more than you make — in energy or in scarce matter.
Energy returned on energy invested
The number that decides whether a source is a press release or a power plant. We optimize the whole loop for EROEI and for materials returned — confinement efficiency, capacity factor, drawdown, fuel and mineral recovery. Every program carries both: a source that needs more energy, or more scarce matter, than it makes is not a source.
Each program is a full operator in its domain — its own physics, platforms, and milestones — coupled through one simulation stack and the Resources loop. Three sources and the connective tissue that closes them.
Hold a star still enough to tap it.
Magnetic-confinement fusion research. We simulate, confine, and control high-temperature plasma — driving toward repeatable net-positive energy gain, not a single demonstration shot.
Q>1
Net-positive gain — energy out beyond energy in
Drill to the heat that never stops.
Deep and supercritical geothermal. Closed loops where rock allows, engineered reservoirs where it doesn't, and next-generation drilling toward depths where one well does the work of dozens.
~90%+
Capacity factor — firm, 24/7, weather-immune
A rainforest's work, in a fraction of the land.
Algae biohydrogen and carbon drawdown. Photosynthesis run at industrial density in closed reactors — green hydrogen straight from sunlight and water, with measured CO₂ removal.
10–50×
CO₂ fixation per hectare vs mature rainforest
Close every loop — fuel, metal, carbon.
The connective tissue. Resources recovers fuel, lithium, materials, and carbon across fusion, geothermal, and bio — so every program returns more matter than it consumes.
EROEI
Energy returned on energy invested — optimized per program
Our core competency is one five-stage pipeline — SIMULATE, ACCESS, EXTRACT, CONVERT, SUSTAIN — that every program instantiates with its own verbs. Ground, nucleus, mantle, or cell: the same discipline, reskinned per source. We solve it once and run it four ways.
SIMULATE
MHD + transport models, compiled to real-time control.
CONFINE
High-field HTS magnets hold the plasma off the wall.
IGNITE
Drive the plasma past break-even — Q>1, repeatably.
CONVERT
Fusion heat to a turbine to grid-firm electrons.
BREED
Lithium blanket breeds tritium; the fuel loop closes.
// Resources is the connective tissue — it recovers fuel, lithium, materials, and carbon across all three sources.
Each program ships through shared software platforms. Mock-first today, with one seam to swap to live data later. The marketing front is the entry point; each platform expands into its own surface as it matures from internal tool to product.
A real-time plasma control and disruption-prediction terminal — coupling the simulation stack to magnet and heating actuators on a shot-by-shot basis.
Reservoir + thermal-front simulation fused with live drilling telemetry; predicts thermal drawdown and well life over decades.
Auditable accounting of lithium, silica, and mineral co-production per well — the book that proves by-product recovery, tied into Segal Resources.
PBR control: light, temperature, gas exchange, culture density, and per-array H₂-yield optimization, mock-first telemetry today.
Verifiable carbon MRV — measurement, reporting, verification. The auditable book that proves tonnes removed, not estimated.
Tracks tritium breeding ratio, inventory, and materials recovery end to end — the auditable book that proves a reactor is fueling itself.
Provenance + circularity accounting for scarce inputs across all programs — every gram of lithium, rare-earth, and catalyst tracked from source to reclaim.
Plans firm, carbon-free dispatch from the combined fleet plus storage — sizing storage and forecasting output to deliver schedulable power.
Achieved, in progress, and roadmap — marked truthfully, across all four programs. In energy, credibility is the only currency that compounds.
HTS magnet coil sustained at 20 T, full operating field.
First in-house REBCO coil to reach full design field with active quench detection, validating the confinement geometry the compact reactor design depends on.
Initial confined plasma, control loop in the loop.
Commissioning the integrated machine — magnets, heating, and the Plasma Control Suite — toward a first sustained, instrumented discharge.
Divertor target under reactor-relevant steady-state heat flux.
Standalone test of divertor materials and cooling against the heat fluxes a power-plant scrape-off layer will impose — measured, not modeled.
Disruption inference + actuation within the disruption growth time.
Close the loop fast enough that a flagged disruption can actually be steered — the latency budget that makes prediction useful rather than forensic.
Stepwise increase in confined-discharge duration, shot over shot.
A duration ladder from seconds toward steady state — the honest path to a duty cycle, climbed one validated rung at a time.
Repeatable Q > 1, energy out beyond energy in.
Not a single record shot, but net-positive gain reproduced on a duty cycle — the threshold of a real power source.
Conductive harvest validated against the subsurface model.
Bench and thermal test bore demonstrating closed-loop conductive heat harvest, with measured output matched to the subsurface twin's prediction.
Instrumented hot-rock loop measuring enthalpy vs depth.
An instrumented loop into hot rock measuring the enthalpy-versus-depth curve that sets supercritical well economics — data over assumption.
Millimetre-wave penetration rate in basalt analogue.
A research demonstrator measuring millimetre-wave penetration rate against a basalt analogue — the bet that could collapse cost-per-metre at depth. Explicitly a bet.
Dispatchable baseload onto a live interconnect.
Reference engagement: a well and conversion plant delivering firm, dispatchable baseload onto a live interconnect.
Measured H₂ evolution from engineered strain vs control.
Bench PBR and strain showing measurable hydrogen evolution against a control culture — biophotolysis demonstrated, yield characterized.
CO₂ fixation rate benchmarked vs rainforest-per-hectare.
A pilot photobioreactor array measuring CO₂ fixation per hectare against a mature-rainforest baseline, under real operating conditions.
Sustained H₂ output from an oxygen-tolerant strain.
Move from batch evolution to continuous production — the oxygen-tolerance problem solved well enough to run without stopping. The frontier, marked as roadmap.
Verified drawdown + dispatchable H₂ electrons.
Reference engagement: verified net carbon removal paired with dispatchable hydrogen power — the coupled output the thesis promises.
Lithium blanket module, tritium breeding ratio > 1 target.
A sub-scale breeding module measuring recovery against the self-sufficiency line — the experiment that decides whether the fusion fuel loop can close.
Selective Li/silica recovery from geothermal brine at temperature.
A DLE skid on geothermal brine measuring selectivity and uptime at production temperature — by-product minerals recovered, not mined.
Cross-program provenance + circularity accounting in production.
Every scarce input across the fleet tracked source-to-reclaim, with an auditable circularity score per program.
Combined fleet + storage delivering dispatchable carbon-free output.
Reference engagement for the coupled thesis: fusion, geothermal, and hydrogen plus storage feeding firm, schedulable electrons onto a live grid.
Short, honest research notes per program — open problems, what's on the bench, and the TRL stated plainly. Research bets are marked as bets. This is where the brand's honesty compounds.
Plasma
We measure how early a model can flag a disruption and how fast the actuators can respond. The open question is margin — predicting in time to steer, not just in time to log.
Steady-state heat fluxes rival a rocket nozzle. We are testing target materials and cooling against reactor-relevant loads to find the duty-cycle ceiling.
14 MeV neutrons embrittle and transmute the first wall. Lifetime under fluence is an open materials problem we treat as a measured curve, not an assumption.
A power plant must breed more tritium than it burns. We model and bench-test lithium blanket designs toward a breeding ratio above one — the line the fuel cycle has to clear.
Subsurface
Can millimetre-wave rock-melting beat rotary cost-per-metre in hard hot rock? We measure penetration rate in basalt analogues. High upside, unproven — a bet, named as one.
Materials and completions above 374 °C / 22 MPa are an open problem. We test casing, cement, and tool survival against the conditions, not catalog ratings.
A reservoir cools as you produce. The subsurface twin forecasts the thermal front; we validate it against real bores to size sustainable production.
Selective recovery of lithium and silica from hot production brine, handed to Resources. Selectivity and uptime at temperature are the measured variables.
Biochemistry
Hydrogenase is poisoned by the oxygen photosynthesis makes. Engineering tolerance — or decoupling the reactions in time — is the central bet. Bench evolution is real; continuous yield is not yet. A bet, named.
Light penetration, shading, and contamination cap areal yield as density rises. We measure where the curve bends to size real reactors.
Drawdown only counts if it is measured, reported, and verifiable. We build the MRV first so the tonnes are auditable, not estimated.
Sustainability
A breeding ratio above one with gram-level inventory control is the make-or-break for fusion fuel. We model blankets and measure recovery against the line.
Direct lithium extraction must stay selective and durable in hot brine over long uptime. Selectivity and fouling are the measured variables.
Circularity and drawdown claims are only worth their audit trail. We build MRV that an outside party can verify, not estimate.
Per-program, no spin. If the answer is roadmap, it says roadmap.
Q is fusion power out divided by heating power in. Q > 1 is scientific break-even at the plasma. A power plant needs engineering gain well above that — we state the plasma Q and the plant-level number separately, never conflated.
Fusion power density scales roughly with the fourth power of magnetic field. HTS (REBCO) tape reaches ~20 T, which shrinks the machine that delivers a given power — the difference between a compact reactor and a stadium.
No. It is a research program with one achieved magnet milestone and a first-plasma commissioning in progress. Net gain and a duty cycle are on the roadmap, marked as such.
Different gradient, same rule. Geothermal is firm, weather-immune power available with today's physics — the heat is proven, only the drilling is hard. It earns its place by capacity factor, not novelty.
Above ~374 °C and ~22 MPa, water becomes a supercritical fluid carrying several times the enthalpy of steam. One supercritical well can deliver the power of many conventional ones — if you can reach and hold those conditions.
It is a research bet at low TRL. Millimetre-wave rock-melting is demonstrated at lab scale; field penetration rates and economics are not proven. We fund it as a bet and report it as one.
No. Biophotolysis splits water with sunlight via algal enzymes, producing hydrogen and oxygen directly. Biomass is a by-product returned to Resources as biochar — not a fuel we combust.
Dense algal culture fixes atmospheric CO₂ as it grows; verified drawdown via the Drawdown Ledger exceeds process emissions. We hold net-negative as a floor and prove it with MRV, not estimates.
No. Measurable H₂ evolution at the bench is achieved. Continuous, economic production depends on oxygen-tolerant strains and is on the roadmap — stated as a research bet.
Both, and a full operator. It is the connective tissue across fusion, geothermal, and bio — but it runs its own pilots (breeding blanket, DLE) and platforms (Fuel Cycle Ledger, Materials Passport).
Because clean electrons made from scarce, un-recovered material aren't sustainable. The company rule is to return more matter than it consumes — Resources is where that is measured and proven.
Energy returned on energy invested — total useful energy out over the energy spent to build, fuel, and run the system. Every program is optimized for it; a source that nets below one isn't a source.
If a word does work on this site, it is defined here. No jargon left to context.
We work with investors, national labs, utilities, and operators who measure progress in confinement time, capacity factor, and energy returned — not press cycles. If that's you, the conversation is short.