Potential of octant degeneracy resolution in JUNO Supported by the China Postdoctoral Science Foundation (2018M643283), the National Key R&D program of China ( 2018YFA0404103) and the National Natural Science Foundation of China (NSFC) (11775315)

This work extends the idea of using a cyclotron-based antineutrino source for purposes of neutrino physics. Long baseline experiments suffer from degeneracies and correlations between , and the mass hierarchy. However, the combination of a superconducting cyclotron and a big liquid scintillator detector like JUNO in a medium baseline experiment, which does not depend on the mass hierarchy, may allow to determine whether the position of the mixing angle is in the lower octant or the upper octant. Such an experiment would improve the precision of the measurement to a degree which depends on the CP-phase.