## The rate of ion production by an electron beam |

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Ai(V Aj(V angle approximation assumed attains averaged axis calculate change column combine considered convenient cos0o data decreases define density of gas differential divide Equation elastic scattering elec electric electron beam electron current electron starting electron trajectories electron with energy enter the beam entering the electron Equation 12 Equation 27 experimental extreme find form free paths functional relationship fundamental gas density gas molecules given electron gives hence increases ion current produced ion production ionization cross section ionization potential ionizing collisions ions are produced ions produced j(nz j(nz)ie j(Vp large loss magnetic field maximum value MDDC mean value molecule entering neglect nP(V number of ions number of type obtain outline parallel particular passing path length probability problem processes Qj(V rate of ion refine Equation relative density result scattering curve subscript taken into account tron types of collision unity with0o zero