Nice article. > At present, the SuperKEKB accelerator is successfully storing both electrons and positrons to prepare for the tests that will lead to new exper

Nice article. > At present, the SuperKEKB accelerator is successfully storing both electrons and positrons to prepare for the tests that will lead to new experiments. I couldn't help but read that as they are stockpiling electrons and positrons, maybe in a barrel somewhere. What do they really mean?