Critical Photon

Critical photon is a late-game material produced by a Ray Receiver in Photon mode after researching Dirac Inversion Mechanism. Instead of supplying power to the grid, the receiver converts energy from the Dyson Swarm or Dyson Sphere into Critical photons. They are a raw resource rather than something crafted from lower-tier materials, so there is no normal production chain for them.

A Ray Receiver in Photon mode produces 6 Critical photons per minute while consuming 120 MW. If a Graviton Lens is inserted, it consumes 240 MW and produces 12 Critical photons per minute. The tooltip shows an energy potential of 1.2 GJ per photon, but this does not mean the item can be burned directly as fuel. The actual drain from the Dyson Sphere or Swarm is higher whenever ray receiving efficiency is below 100%.

Critical photons are mainly processed in a Miniature Particle Collider, where each one yields 2 Antimatter and 2 Hydrogen. This conversion is especially useful for endgame fuel production, since 6 Antimatter and 6 Hydrogen are needed to make 1 Antimatter Fuel Rod. The chain therefore matches the rod recipe exactly in terms of these two components, though the other ingredients for the fuel rod still need to be supplied separately.

A few practical points:

• Switching a Ray Receiver from Energy mode to Photon mode is what enables Critical photon production.
• Ray Receivers in Photon mode are much more demanding on the Dyson Sphere or Swarm, so scaling up photon production requires ample available power.
• If the Dyson Sphere cannot meet total demand from active receivers, all receivers are reduced proportionally, which can also cut photon output.
• Because photon mode increases output by a factor of five relative to its normal power-export behavior, adding even one photon-producing receiver can significantly affect the power available to the rest of the network.

In short, Critical photon is the late-game energy product of the Ray Receiver and a key intermediate for antimatter-based manufacturing.