| | 27 | After the H,,2,,^+^ is seperated it is counted by a Channeltron Electron Multiplier (CEM). The CEM has a conical opening leading to a serpentine shaped tunnel. The insides of the cone and tunnel are coated with lead glass material. When a potenial difference is applied across this tunnel, incident particles will crash into the walls, splashing off electrons. The electrons pinball their way through the tunnel gaining more electrons everytime they hit the walls. This electron avalanche pinballs its way through until it hits the channel end anode where the pulse of electrons is measured. |
