#5781
QuantumG
Participant

Is the use of the focus fusion device as a thruster written up somewhere?

Like.. with actual numbers?

Important numbers being:

* count and velocity of particles emitted per shot
* number of shots per second
* total mass of the device, capacitors, wiring, etc
* total mass of any anticipated shielding (depends on application)

Here I’m imagining an operating mode where just enough net power is generated to do the next shot and the remaining velocity of the high energy ions is used as exhaust to generate thrust. There are other possible operating modes:

* use as an electricity source to power a conventional hall effect thruster, ion thruster, or something exotic like VASIMR
* thermal heating of a traditional propellant like hydrogen.. this would be possible, for example, by using the x-rays, meaning they can’t be captured for net power production.

Estimates of these numbers will allow you to make comparisons with other (typical solar powered) thruster technologies.

Does anyone think a focus fusion thruster (FFT?) could be built with a thrust/weight ratio on par with chemical rockets? Or are we firmly in the domain of high-specific-impulse electric propulsion?