confinement in radial direction by strong homogeneous magnetic by jennyyingdi

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									Atomic Mass of the Electron: Principle of the Penning Trap



                              confinement in radial direction
                                 by strong homogeneous
                                      magnetic field




                          confinement in axial direction
                               by electrostatic field
Particle Motion in the PenningTrap


axial motion:
oscillation in E-field
        qV0
ωz =                                            axial motion
        md 2

magnetron motion:
E x B drift,ω −

                ω
cyclotron motion: +                  magnetron motion
                                                               cyclotron motion




                                q 2
               ω = ω + ω + ω = ( B)
                 2
                 c
                          2
                          +
                                     2
                                     z
                                            2
                                            −
                                m

								
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