  Novel ultra-compact, electrically switchable, time-structured/pulsed, ~1-14
MeV-level neutron and photon generators have application embedded into large
detector systems, especially calorimeters, for energy and operational
calibration. The small sizes are applicable to permanent in-situ deployment, or
able to be conveniently inserted into large high energy physics detector
systems. For bench- testing of prototypes, or for detector module production
testing, these compact n and gamma generators offer advantages.
