Fusion Reactor | ATM10 Introduction The Fusion Reactor is Mekanism's end-game multiblock power generator capable of producing enormous amounts of energy through nuclear fusion. Unlike the Fission Reactor, the Fusion Reactor cannot melt down, making it one of the safest large-scale power generation methods available in All The Mods 10 . This guide explains how to construct the reactor, understand the Reactor Controller, produce D-T Fuel, ignite the reaction, and maintain continuous power generation. Overview The Fusion Reactor consumes D-T Fuel (Deuterium-Tritium Fuel) to sustain a fusion reaction. Once ignited, it continuously generates energy while fuel is supplied. The reactor can operate in one of two modes: Passive Mode - Generates FE directly. Water-Cooled Mode - Produces Steam for an Industrial Turbine, resulting in significantly higher power output. Feature Fusion Reactor Meltdown Risk None Fuel Type D-T Fuel Power Output Very High Cooling Options Passive or Water-Cooled Ignition Required Yes Required Components Before constructing the Fusion Reactor, gather the following components. Component Required Purpose Fusion Reactor Controller ✔ Controls the multiblock and displays reactor information. Fusion Reactor Frame ✔ Forms the reactor casing. Fusion Reactor Port ✔ Transfers fluids, gases and energy. Laser Focus Matrix ✔ Required for laser ignition. Fusion Reactor Logic Adapter Optional Provides automation and redstone control. Building the Reactor Construct the multiblock structure exactly as shown in JEI. The interior of the reactor must remain completely hollow for the structure to form correctly. Once construction is complete, right-click the Fusion Reactor Controller . Information If the multiblock has been assembled correctly, the controller will display Structure Formed . If it reports Structure Incomplete , verify that: Every required Fusion Reactor Frame has been placed. The interior is completely hollow. A Laser Focus Matrix has been installed. At least one Fusion Reactor Port is present. Reactor Controller The Reactor Controller provides access to all reactor information and settings. Right-click the Controller to open its interface. Main Screen The Main Screen displays the overall status of the Fusion Reactor. Structure status Charged Hohlraum slot Access to the Heat, Fuel and Statistics tabs The text displayed at the top of the interface indicates whether the reactor structure is correctly assembled. Important The Main Screen contains a single inventory slot. A Charged Hohlraum must be inserted into this slot before a laser can ignite the Fusion Reactor. Heat Tab The Heat tab displays the reactor's operating temperatures and internal storage. Indicator Description Plasma Temperature Current plasma temperature inside the reactor. Case Temperature Temperature of the reactor casing. Internal Energy Current FE stored within the reactor. Water Amount of water stored for cooling. Steam Steam currently stored inside the reactor. Fuel Tab The Fuel tab displays the reactor's fuel supply and current Injection Rate. Tank Contents Left Deuterium Centre D-T Fuel Right Tritium The reactor consumes Deuterium and Tritium at a rate equal to half of the current Injection Rate per tick . Statistics Tab The Statistics tab displays technical information about the reactor. Current Injection Rate Maximum Plasma Temperature Passive FE Generation Steam Production This information is useful when monitoring reactor performance and tuning power output. ] Producing D-T Fuel The Fusion Reactor requires D-T Fuel to sustain the fusion reaction. D-T Fuel is produced by combining Deuterium and Tritium in a Chemical Infuser. Both gases are produced from Water using Mekanism's gas processing machines. Information Producing Tritium can take significantly longer than Deuterium due to the Solar Neutron Activator only operating during the daytime. Consider building multiple Solar Neutron Activators to increase production. Producing Tritium Tritium is produced by converting Hydrogen inside a Solar Neutron Activator. Step 1 - Produce Hydrogen Supply Water to an Electrolytic Separator . The machine separates Water into: Hydrogen Oxygen Only the Hydrogen output is required for Tritium production. Step 2 - Convert Hydrogen into Tritium Pipe the Hydrogen into a Solar Neutron Activator . The Solar Neutron Activator requires: Direct access to the sky. Daylight. The Hydrogen will gradually be converted into Tritium . Producing Deuterium Deuterium is produced by condensing Hydrogen into its liquid form. Step 1 - Produce Hydrogen Supply Water to an Electrolytic Separator . Collect the Hydrogen output. Step 2 - Condense the Hydrogen Pipe the Hydrogen into a Rotary Condensentrator . Set the Rotary Condensentrator to Condensentrating Mode . The Hydrogen will be converted into Deuterium . Producing D-T Fuel Once both gases have been produced, they can be combined into D-T Fuel. Input Machine Output Deuterium + Tritium Chemical Infuser D-T Fuel Insert both gases into the Chemical Infuser and it will continuously produce D-T Fuel . Charging a Hohlraum The Hohlraum is a critical item used to ignite the Fusion Reactor. Without a Charged Hohlraum , the Fusion Reactor cannot be started using lasers. Charging the Hohlraum To charge a Hohlraum: Produce at least 10 mB of D-T Fuel inside a Chemical Infuser. Insert an empty Hohlraum into the centre slot of the Chemical Infuser. The Hohlraum will absorb the fuel and become a Charged Hohlraum . Remove the Charged Hohlraum and insert it into the inventory slot of the Fusion Reactor Controller . Important A Charged Hohlraum is consumed when the Fusion Reactor is successfully ignited. If the reactor shuts down in the future, another Charged Hohlraum will be required to restart it. Preparing for Ignition Before attempting to start the Fusion Reactor, verify that all of the following requirements have been met. Requirement Status Fusion Reactor Structure Formed Required Laser Focus Matrix Installed Required Charged Hohlraum Installed Required D-T Fuel Available Required Laser Amplifier or Heat Source Required Tip Keep one or more Charged Hohlraums stored nearby. If the reactor is shut down for maintenance or runs out of fuel, you'll be able to restart it immediately without waiting for another Hohlraum to charge. Starting the Fusion Reaction Unlike most Mekanism generators, the Fusion Reactor does not start automatically. Before the fusion reaction can begin, the reactor's plasma must reach 100 MK (100 Million Kelvin) while a Charged Hohlraum is installed inside the Reactor Controller. Once ignited, the Charged Hohlraum is consumed and the reactor will begin generating power while continuously consuming D-T Fuel. Method 1 - Laser Ignition (Recommended) Laser ignition is the fastest and most commonly used method of starting a Fusion Reactor. Requirements Requirement Minimum Charged Hohlraum 1 Laser Amplifier Energy 1 GFE Laser Focus Matrix Installed Ignition Steps Insert a Charged Hohlraum into the Reactor Controller. Charge a Laser Amplifier until it contains at least 1 GFE . Aim one or more Lasers into the Laser Amplifier. Set the Laser Amplifier Redstone Mode to Normal . Trigger the amplifier with a Button or Redstone signal. The stored laser energy will fire into the Laser Focus Matrix and instantly ignite the reactor. Tip Leave the Laser Amplifier connected after ignition. Keeping it charged allows the reactor to be restarted immediately if it ever shuts down.   Power Generation Modes The Fusion Reactor supports two operating modes. Mode Output Recommended For Passive Mode FE Simple power generation Water-Cooled Mode Steam Industrial Turbine setups Passive Mode Passive Mode produces FE directly from the reactor. Simple to set up. No Steam management required. Ideal for smaller installations. Water-Cooled Mode Supplying Water to the reactor enables Water-Cooled Mode. The reactor converts Water into Steam, which can then be sent into an Industrial Turbine . This configuration produces considerably more usable power than Passive Mode and is recommended for most late-game bases. Maintaining the Reactor Once ignited, the Fusion Reactor will continue operating as long as it has a continuous supply of fuel. Fuel Production Keep Electrolytic Separators supplied with Water. Ensure Solar Neutron Activators have direct access to the sky. Keep Rotary Condensentrators and Chemical Infusers powered. Maintain a reserve of D-T Fuel inside Chemical Tanks. Injection Rate The Injection Rate determines how much fuel is consumed every tick. Higher Injection Rate Effect Fuel Consumption Increases Power Output Increases Steam Production Increases Information Only increase the Injection Rate once your Deuterium and Tritium production can continuously supply the reactor. Running out of fuel will cause the reactor to shut down. Troubleshooting Problem Possible Cause Solution Structure Incomplete Missing or incorrectly placed blocks. Verify the multiblock matches the JEI structure. Reactor Will Not Ignite Missing Charged Hohlraum or insufficient laser energy. Install a Charged Hohlraum and fire at least 1 GFE into the Laser Focus Matrix. No Tritium Production Solar Neutron Activator blocked or operating at night. Provide direct sky access or wait until daytime. Reactor Stops Running Fuel production has stopped. Restore Deuterium and Tritium production. Low Power Output Low Injection Rate. Increase the Injection Rate once fuel production is sufficient.   Tip For the highest possible power output, pair the Fusion Reactor with a correctly sized Industrial Turbine and maintain a steady supply of D-T Fuel. This setup provides one of the most efficient long-term power solutions available in ATM10.