I seem to be having a problem adding a reply to the end of the previous thread so I am starting a new one! Thanks for everyone replying. A couple of points. The first is that nobody seems to have tried two end-on plasmas directed at each other. A dense pair of plasmas fired at each other will make a hit 90% of the time. I have experimented with two welding flames directed at each other. (Dangerous and I don't recommend it). Very little of the flame gets through. Most 'splashes' sideways, that is most particles collide with one another. The second point is that the individual average velocities required for these plasma flames to achieve fusion appears to be relatively low. (See my previous thread). The velocities can be steadily raised until a useful level of fusion is achieved. And by 'useful', I mean something above the minute and ephemeral - something continuous that can be used to generate large-scale electric power. On the question of magnetic acceleration, doesn't a 'stripped' moving plasma have a magnetic field? If the surrounding magnetic field is intense enough, won't it hold the plasma? In fact, isn't this how a Tokamac works? Couldn't a straight-line linear magnetic field confine the plasma for the brief time required? If the plasma were held in accelerating 'pockets', wouldn't the plasma accelerate along with the pockets, until they are at a sufficiently high velocity to generate fusion? I have designed such a magnetic plasma accelerator. I think continuous plasma fusion is technically feasible and commercially practical. As for extracting the energy required, I suggest that a stream of gas, say helium, or water vapour, be directed at the point of impact at right angles to the plasma stream to generate super-heated gas for electricity generation. The deuterium can be extracted from the waste gas after the electric power has been generated.