http://nextbigfuture.com/2009/07/photonic-propulsion-and-fusion-work-at.html
MIMS can be used for generating super-intense x-ray beams with unprecedented high conversion efficiency from kinetic-energy to x-ray energy, over 40%. Such super-intense x-ray beams can make inertial confinement nuclear fusion more efficient and economically viable. Metastable Innershell Molecular State (MIMS) is a new high energy density matter quantum state. MIMS exists in matters compressed “suddenly” at pressures in excess of one hundred million atmospheres.