Operation of an electrostatic ion trap in a uniform magnetic field

摘要: The electrostatic ion trap consisting of an outer cylinder with end caps plus a concentric central wire is relatively easy to construct compared rf and Penning traps. Its use in uniform magnetic field several Gauss has been studied so that, for example, optical pumping the trapped ions would be possible appropriate ionic species. Initial investigations using either He or Ar approximately logarithmic potential between indicate that trapping time slightly reduced when 25–50 G applied parallel axis. However, allows filled initially substantially more ions. Computer plots numerous nonperiodic orbits revolutions both without serve as guide understanding operation field. These show major features trajectories remain unchanged fields up 100 G, although almost zero initial angular momentum about can present.