Tri-layer graphene can help to produce positrons from the photons. (continuation of the previous one)

"Making matter from light: Two gold (Au) ions (red) move in opposite direction at 99.995% of the speed of light (v, for velocity, = approximately c, the speed of light). As the ions pass one another without colliding, two photons (γ) from the electromagnetic cloud surrounding the ions can interact with each other to create a matter-antimatter pair: an electron (e-) and positron (e+). Credit: Brookhaven National Laboratory" (https://phys.org/news/2021-07-collisions-matterantimatter-pure-energy.html)

When we are thinking about this tri-layer graphene. We can ask could this kind of material is useful in the tests where photons are turned into electron-positron pairs. In this model, the gold (or some other heavier) ions will be driven to both sides. Up and down through the graphene. And then the light will shoot through those layers. That thing allows those ions can make the glancing collisions.

In the simplest model gold ions would shoot through those graphene layers, And the photons will come sideways. Then the electrons and positrons are forming between those graphene layers. Then those particles can collect to store.

Image II) Trilayer graphene

But in the more interesting idea, those particle-antiparticle pairs can create by using stable cold ions. Those are positioned over those graphene layers. The photons will shoot through those ions, which are almost touching each other. But can that thing be real? That is pure speculation. But if that is done successfully. That can make antimatter production cheaper than it has been before. And those systems can use in antimatter engines. The ability to create the antimatter straight from light is opening the path to the new and more powerful antimatter-based power technology.

For making a successful antimatter producing system gold ions can install over the graphene that is so close to another graphene layer that the gold atoms are almost touching each other. If those layers are oscillating there is possible to make more electron-positron pairs than using the freely traveling gold ions. The question is do those ions need an extremely high speed for creating the electrons and positrons.

But even if creating the electron-positron pairs from photons is possible only when the gold ions are traveling freely from the accelerator. The graphene network can help to collect those particles for storage.

()https://scitechdaily.com/mit-physicists-discover-magic-angle-trilayer-graphene-may-be-a-rare-magnet-proof-superconductor/

Image I()https://phys.org/news/2021-07-collisions-matterantimatter-pure-energy.html

Image II()https://scitechdaily.com/mit-physicists-discover-magic-angle-trilayer-graphene-may-be-a-rare-magnet-proof-superconductor/

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