## Random Walk Study of Electron Motion in Helium in Crossed Electromagnetic Fields |

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### Common terms and phrases

approximation average number azimuthal angle background pressure B/p Cartesian coordinate collisions tp Component of random crossed field configuration cyclotron denote asymptotic values differential scattering cross diffusion coefficient drawn to determine drift velocities elastic collisions Elastic scattering electron energy distributions electron motion electron trajectories electron transport coefficients energy exchange energy lost equation 18 F distribution free time period Gaseous Inelastic isotropic distribution isotropic scattering magnetic field strength Maxwellian mean energy MOTION IN HELIUM newton 30 V/cm-torr newton 95 G/torr number of collisions number of steps number of test obtained predicted by equation radians Random electron energy random number random walk RW RANDOM WALK STUDY Ratio of magnetic reference 9 scattering angle scattering cross section Solid symbols denote steady state conditions steps per walk strength to background symbols denote asymptotic terminal steady test electrons Theory of ref Townsend ionization coefficient type of interaction volt-meter per newton Wb/N weber per newton