  Collapsing magnetic traps (CMTs) are one proposed mechanism for generating
non-thermal particle populations in solar flares. CMTs occur if an initially
stretched magnetic field structure relaxes rapidly into a lower-energy
configuration, which is believed to happen as a by-product of magnetic
reconnection. A similar mechanism for energising particles has also been found
to operate in the Earth's magnetotail. One particular feature proposed to be of
importance for particle acceleration in the magnetotail is that of a braking
plasma jet, i.e. a localised region of strong flow encountering stronger
magnetic field which causes the jet to slow down and stop. Such a feature has
not been included in previously proposed analytical models of CMTs for solar
flares. In this work we incorporate a braking plasma jet into a well studied
CMT model for the first time. We present results of test particle calculations
in this new CMT model. We observe and characterise new types of particle
behaviour caused by the magnetic structure of the jet braking region, which
allows electrons to be trapped both in the braking jet region and the loop
legs. We compare and contrast the behaviour of particle orbits for various
parameter regimes of the underlying trap by examining particle trajectories,
energy gains and the frequency with which different types of particle orbit are
found for each parameter regime.
