Jones, The large spheres outside the cavity are monatomic hydrogen which occasionally collides to form h2 and give off a red photon, the h2 either gets repelled away from the entrance to the cavity or disassociates due to change in Casimir force which wants to change the atoms to a fractional state in opposition to the bond. Once inside the atoms shrink to fractional states - if they form a fractional h2 molecule they give off what appears to be a blue photon from our perspective outside the cavity. The new fractional molecule can no longer be simply repelled away from the change in Casimir force because it is already at an intermediate fractional value which is going to change no matter which direction gas law drives the molecule (assuming the geometry is dynamic and not smooth like inside a nanotube that only has cat action at openings and defects). As the molecule moves Casimir force accumulates trying to change the fractional orbit until it finally breaks the diatomic bond allowing the translation to occur.
I am not saying that hydrogen isn't stored as hydrides but this sim only focuses on the ash less chemistry that I believe occurs when the stage is properly set with atomic gas and a rigid catalyst with vigorous geometry (confinement). The fractional orbits inside the cavity react differently to Casimir effect depending on their bond state. diatoms outside the cavity resist the change in isotropy and get repelled or disassociated by proximity to the mouth of the cavity while atoms can translate freely into the cavity. Regards Fran SIM 1.0 fractional hydrogen ash less chemistry<http://www.byzipp.com/sun31.swf> Thanks for the feedback -this is just Sim 1.0 and is less presentable than it will be in time.