Hi All, First time poster here, and I've got a couple questions. Straight up, I'm writing a sci-fi story where antimatter is utilised as fuel (feel free to laugh at the cliche), and I want to portray it as realistically as possible. To that end, I've come up with a storage method and I want to see if the math holds up. So, here are the parameters: assume you have exactly one kilogram of antimatter assume the entire mass uniformly consists of anti-Alpha particles (nuclei of 2 antiprotons and 2 antineutrons) assume this mass is contained in a vessel with an electromagnetic field powerful enough to suspend the total mass from coming into contact with any other matter assume that the vessel is equipped with an internal reaction chamber that has a source of normal Alpha particles, and that the vessel is continuously drawing Alphas and anti-Alphas into this chamber at a consistent rate assume the annihilation energy released in this reaction chamber is fully converted to electrical energy and used to power the electromagnetic field to contain the remaining mass So, with all that out of the way, two questions: how much energy in joules per second would be needed to maintain a containment field strong enough to maintain the repulsive forces necessary to keep the antimatter contained? based on that, what would the rate of consumption of stored antimatter in metric mass units per hour have to be to make that much energy? I'm hoping it will last years, preferably decades, ideally centuries before being depleted. But if it only lasts days or hours, then it's not a practical solution (even in fiction) and I'll have to have a rethink.