New method improves proton acceleration with high power laser using frozen hydrogen as target

https://phys.org/news/2023-07-method-proton-high-power-laser.html

"much more compact facilities... advanced tumor therapy... fine, strongly cooled hydrogen jet target... hydrogen cooled solidified into mm-thin filament...  radiation pressure push electrons out of hydrogen create extreme electric fields accelerate protons... optimized sending short weaker light pulse in front of main laser pulse... increases acceleration distance... proton energy 80 MeV... multiple proton bunches/ s... AI algorithms increase the hit rate between pulses and frozen hydrogen jet... increase dose shorten irradiation time"

Related: What do you do with a shrunken laser?
https://phys.org/news/2023-08-shrunken-laser.html