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Cake day: October 13th, 2023

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  • That’s ~4% that is typically considered low but even if it wasn’t.

    It’s not one assembly line, and one product only… it’s every component from the chips to the glass, screen, circuit board and then the final one on.

    You would need also experienced people in every part you would need to manufacture including engineers that are in short supply, an nevermind building the factories etc…














  • Abstract:

    We discovered a simple regime where a near-critical plasma irradiated by a laser of experimentally available intensity can self-organize to produce positrons and accelerate them to ultrarelativistic energies. The laser pulse piles up electrons at its leading edge, producing a strong longitudinal plasma electric field. The field creates a moving gamma-ray collider that generates positrons via the linear Breit-Wheeler process—annihilation of two gamma rays into an electron-positron pair. At the same time, the plasma field, rather than the laser, serves as an accelerator for the positrons. The discovery of positron acceleration was enabled by a first-of-its-kind kinetic simulation that generates pairs via photon-photon collisions. Using available laser intensities of 1022  W/cm2, the discovered regime can generate a GeV positron beam with a divergence angle of around 10° and a total charge of 0.1 pC. The result paves the way to experimental observation of the linear Breit-Wheeler process and to applications requiring positron beams.

    journal