Abstract—Solar neutrons are the tell-tale of highly energetic
processes (e.g. solar flares) at the Sun in which particle acceleration
is taking place over a broad range in energy. Unlike charged
radiation, neutrons escape unscathed from the ambient magnetic
fields, providing a view of particle acceleration unhindered by
the effects of transport. High-energy neutrons are challenging
to measure with the traditional double scatter technique based
on time-of-flight (ToF). This technique is limited by the finite
flight path and active scintillator sizes required by small satellite
platforms. The new SOlar Neutron TRACking (SONTRAC)
concept, based on scintillating-fiber bundles, will provide highresolution
imaging of fast neutrons at energies where the bulk of
solar and magnetospheric neutrons resides. Recent development
of the new SONTRAC instrument concept’s advanced electronics
and processing algorithms are presented.
