William edited figures/Neon_graph/caption.tex  over 8 years ago

Commit id: cae71a6779914ae20c957993c0e721f9546dda8f

deletions | additions      

       

The Franck-Hertz Curve for Neon. "V Inverted" is the measured anode current, converted to an output voltage using a current preamplifier. Since the signal was inverted the dips in anode current that correspond to excitation of atoms in the vapor are actually the peaks in this graph. Ionization leads to a large increase in electron beam current(and thus "V Inverted")  because the process of ionization leads to the liberation of more electrons and positive ions. Since "V inverted" is just the anode current converted to a voltage, when the vapor ionizes, "V inverted" should increase as well.