Example of our method to instantaneously identify jet regions for a jet opening angle of 10° at time t = 20 (case E). We show the masks locating the jet (left) mixing region (center) and the shocked ISM (right). We identify the jet beam by γ ≥ 2, finding the mixing region where |(∇ × v)_φ| > 1 without the jet beam, and the cocoon where τ ≠ τ_t = 0 with beam and mixing region excluded.