Assertion: ion's proton | /r/CapableOf | get with driving electric field
Facets:
value: out of phase
type: TEMPORAL
Source sentences:
text: Therefore, simple cyclotrons can accelerate protons only to an energy of around 15 million electron volts (15 MeV, corresponding to a speed of roughly 10% of c), because the protons get out of phase with the driving electric field.