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The recent proposal of photon and neutrino pair beam is extensivelyinvestigated. Production rates, both differential and total, of single photon,two-photon and neutrino-pair emitted from quantum ions in circular motion arecalculated for any velocity of ion. This part is an extension of our previousresults at highest energies to lower energies of circulating ions, and helpsmuch to identify the new process at a low energy ion ring. We clarify how toutilize the circulating ion for a new source of coherent neutrino beam despiteof much stronger background photons. Once one verifies that the coherence ismaintained in the initial phases of time evolution after laser irradiation,large background photon emission rates are not an obstacle against utilizingthe extracted neutrino pair beam.

Photon and neutrino-pair emission from circulating quantum ions