[N0B0DY]

Yes they're much more effective in high-energy experiments, though the one I'm familiar with uses magnetic fields to center the electrons. Electrons moving in straight lines are impossible.

Yet, the point to me is that low-energy electron experiments, which simulate an interstellar environment, indicates there is a neglected radiation based on photon scattering accelerating electrons at rest; and the following is the part I thought you would be especially interested in as an alternative for the doppler effect.

"It may at least be realized that the redshift in emission should be, in general, different from that in absorption and also influenced by the energy of the quantum states that characterize the absorption medium.

"One must then conclude that a redshift is produced due to hydrogen in space according to Eq. (12). This redshift appears undistinguishable from Doppler redshift for radiation with a short coherence time. The energy loss of the initial radiation appears separately as very low frequency radio waves."