Don’t worry, I have more than 20 years until my retirement! Unless I choose to make an early retirement 😉 Right… the project. Just for fun I searched for cryocoolers and guess what? Used cryocoolers don’t cost as much as one might expect. With thousand bucks or so one can get a pretty decent cryocooler capable of bringing hydrogen under 13.99 K. Oh yeah, that means solid hydrogen!
With solid hydrogen I can, in theory, confirm the unique prediction of TOEBI regarding particle annihilation.