A magnetic field at {HEAD ~ the surface} redirects ions and electrons based on their velocity and {TAIL ~ charge} 
A magnetic field at { HEAD ~ the surface } redirects ions and electrons based on their velocity and { TAIL ~ charge }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL