Energetic Neutral Atom (ENA) and Energetic Particle Observations from an Interstellar Probe

Owing to the involved measurement techniques, it is natural to consider combining ENA and energetic particle observations within the same instrument housing. Such an instrument therefore provides a mix of local (in-situ) and remote sensing measurement capabilities. Driven by a suite of recent observations from the Interstellar Boundary Explorer (IBEX) and Cassini, it is clear that there are a rich set of interactions between our Sun and the very local interstellar medium (VLISM). These interactions involve processes operating on a variety of scales and with a number of features, which will require the next generation of measurements. Here we discuss the capabilities of the JENI instrument as developed for ESA's JUICE mission, and how those capabilities would in turn manifest themselves on an Interstellar Probe mission in terms of observations to advance our knowledge of the interactions of the sun with the VLISM inside the termination shock, during transit of the heliosheath, and finally from outside of our heliosphere.