No one knows the origin of the Anti-matter man but he seems to be an explorer from the antimatter universe of Qward.
Antimatter rockets can be divided into three types: those that directly use the products of antimatter annihilation for propulsion, those that heat a working fluid which is then used for propulsion, and those that heat a working fluid to generate electricity for some form of electric spacecraft propulsion system.
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The idea of using antimatter to power an electric space drive has also been proposed.
Cavanagh has been involved in other projects including Leafblade, an acoustic & Celtic rock band, (guitars and vocals), and Antimatter, the former band of ex-Anathema member Duncan Patterson.
He is brought to Qward by John Stewart along with other Lanterns to stop Sinestro's last plan to destroy Oa by flaring over the planet with antimatter bursts.
Tom Stoppard's play "Hapgood" features a reflection by a bearded physicist on trapping antimatter.
Recently Friedwardt Winterberg has suggested a means of converting an imploding matter-antimatter plasma into a highly collimated beam of gamma-rays - effectively a gamma-ray laser - which would very efficiently transfer thrust to the space vehicle's structure via a variant of the Mössbauer effect.
He has also contributed to the physics of table top Muon-catalyzed fusion, antimatter formation and annihilation, and artificial intelligence.
During 2011, Mark worked with Duncan Patterson (ex-Anathema, ex-Antimatter) to create a debut album called 'The Brink' for Duncan's new band.
The phrase "mirror matter" was also introduced by physicist and author Dr. Robert L. Forward as an alternative term for what is commonly called antimatter, in an attempt to emphasize that antimatter is identical to ordinary matter, except reversed in all possible ways (i.e., CPT).