@parados,
There is no such thing as a completely stationary electron. The ion is held stationary in the magnetic fields of a Penning trap, but the particles are still oscillating within it.
Quote: For trapping of positive (negative) ions, the endcap electrodes are kept at a positive (negative) potential relative to the ring. This potential produces a saddle point in the centre of the trap, which traps ions along the axial direction. The electric field causes ions to oscillate (harmonically in the case of an ideal Penning trap) along the trap axis.
The mass of the particles at each location of the oscillation is always the same. The name of each particle at a particle location is always the same. But, like musical chairs, it is not the same particle. For instance if you have four people on a merry go round and the position marked electron is the the one that has a stationary person standing there pushing each individual as they pass. Each individual has the same force exerted on them in three positions away from the pusher, but all have a different force in the electron position when the pusher pushes them individually as they pass him. In my picture the pusher is the space time continuum, or the ether, or the higgs boson, or whatever science calls it. The ether is made up of virtual particles that are oscillating with it and thus absorbing some of the momentum of the electron thus drastically reducing its mass in that position. Since in everyday life, unlike in a penning trap, the electron is not interlocked with the ether causing an electron cloud. This creates a larger statistical area the electron can be located, so it isn't trapped. If it was trapped it area would look like one of the atomic orbitals. Such as this
l=1,
n= 3 hydrogen orbital.
https://en.wikipedia.org/wiki/File:P3M0.png Note as the energy decreases the atom oscilates only in the first layer of ether surrounding it, instead of two layers deep, and the outer lobes disappear leaving a simpler orbital
l =1
n=2
https://en.wikipedia.org/wiki/File:P2M0.png In between the red and blue clouds is where the quarks of the proton are located still interlocked, interchanging, and oscillating with the electron.