Probe_8 contains one unexpected term: the real array E_ij(6,6). This array contains the stochastic kicks to the quadratic moments due to radiation.
type probe_8 type(real_8) x(6) type(spinor_8) s(3) type(rf_phasor_8) AC real(dp) E_ij(6,6) logical u type(integration_node),pointer :: lost_node end type probe_8