From Nextbigfuture.com
"Positron Dynamics Vision of Antimatter Catalyzed Fusion"
http://www.nextbigfuture.com/2…vision-of-antimatter.html
"Positron Dynamics near term work to proving out antimatter catalyzed deuterium fusion propulsion with over 100,000 ISP"
http://www.nextbigfuture.com/2…cs-near-term-work-to.html
Also related -
"The antimatter factory..."
http://www.theverge.com/2013/8…fusion-annihilation-laser
Several fairly recent pre-prints also note that positron creation is enhanced in certain em-fields.