Abstract
A new particle beam cooling scheme “cyclotron maser cooling” (CMC) was examined. Under a stimulating rf field below the critical value prescribed by an action time of the field, a beam of gyrating electrons obeyed the Liouville's theorem. However, when the field reached the critical value, the beam abruptly jumped to a critical point of the radiative system undergoing CMC, where all electrons accumulated at one discrete energy within about 30, ns. On the other hand, when the field exceeded the critical value by less than 1, dB, a coherent energy modulation took place in gyrations. As a possible mechanism of this remarkable phenomena, a phase transition or a macroscopic quantum jump induced by the “quantum field action effect” on radiation cooling was presented. Under a stimulating ratiation field below the quantum field action any oscillator system remains non-radiative. However, under the stimulating quantum field action, a macroscopic quantum jump to the radiative system takes place leading to its cooling to a stable state irrespective of photon emission mode.
