The moonbase plays a big role in the solar system colonization.

Moonbase is the thing that might not look so impressive as Mars or Jupiter bases. But in moonbase, the researchers can find out how to make structures in space conditions. The moonbase is the perfect place for making social and other types of tests for long-term flights. If something goes wrong the mission must abort immediately. There is possible to test life-support and other systems.

Moon station is also possible to use for testing systems like computers, independent operating robots, and AI. And other things that will be trusted and easy to operate. If something goes wrong on the Moon. that thing is far easier to fix than if something goes wrong on Mars. 

And on the moon returning to Earth is easier than from Mars or the asteroid belt. The moonbase is also offering a safe place for loading and starting the nuclear reactors for nuclear-powered rockets. When some nuclear-powered NERVA or ion rocket starts near-Earth. And if something goes wrong. There is the possibility that radioactive debris will fall to the Earth. 

So if the starting of those engines will happen at the Moon orbiter the radioactive debris will fall to the ground. The moon is also offering a shield against the EMP-pulses that are forming if the Orion-type of system where the small nuclear bombs will push the craft to the outer solar system. The ion rockets can also cause problems for satellites if the high-energetic ions will impact them. 

The thing is that electrostatic and microwave-based systems where the propellant is vaporized by using microwaves and them shoot back by using magnetic accelerators are one of the most capable systems. The ion engine requires vaporized material like iron steam but also other ions would be useful. 

The problem is how to vaporize the iron or silicone? One version is to use a hybrid system where the material is vaporized by using microwaves. And then it will ionize. Then the system will drive those ions backward by using the magnetic track. 

Things like water jet rocket engines are rocket engines. Which are using water or hydrogen as the propellant. The idea of those systems is to replace nuclear reactor what is used in NERVA engines by using something that is not so radioactive. That thing makes the microwave engine a useful tool. 

Liquid hydrogen or water will pump into the nozzle. And microwaves are vaporizing it. The full benefit of those systems will get if the liquid gas has a low vaporizing point. The microwaves can use to expand the propellant as well fire or nuclear engines are making. The moonbase is ideal for testing that kind of system. 

https://scitechdaily.com/off-earth-manufacturing-using-local-resources-to-build-a-new-home-on-another-world/

https://en.wikipedia.org/wiki/EmDrive

https://en.wikipedia.org/wiki/NERVA

https://en.wikipedia.org/wiki/Project_Orion_(nuclear_propulsion)

Image: https://scitechdaily.com/images/Future-Moon-Base-1536x864.jpg

One improvement for Orion spacecraft

Kimmo Huosionmaa

The normal rifle could launch Highly Enriched Plutonium or Californium bullets in the back of the craft, and then that ammunition would target the electromagnetic radiation by using the parabolic antenna in the back of the craft. The gun would release the bullet in the middle of the antenna, and the bullet would go thru the focal point of radiation, what would cause the nuclear fission in that piece of the highly enriched nuclear isotope. In this system standard ammunition, that is filled with gunpowder and that would make the structure of that system simpler than some magnetic rails or some other electromagnetic solutions.


That would give a more sensitive punch, and makes easier to adjust the speed of the device. Sometimes those bullets were planned to fill with Lithium, and the radiation would be mixed radio and laser rays. In fact, the normal Lithium batteries could be used in that motor. The energy of this spacecraft would get from nuclear reactors, what gives enough power to lasers and other devices of that craft. This thing would be similar, what is planned for use in the "Daedalus".  The hypothetical space probe, what would sometimes in the future travel to the Alfa Centauri. Why I'm writing about "Orion" and "Daedalus" in the same text, is the propulsion of those spacecraft are basically the same, but "Orion" uses fission and "Daedalus" uses nuclear fusion for creating the power for accelerating the spacecraft.


Using a nuclear reactor for pumping the energy for fusion system allows making fusion motor application in the spacecraft. The fusion system in this hypothetical spacecraft is not self-operating or self-maintaining. It needs the outer power source for function. Or maybe fission would be used at the beginning of the operation, and then the ship would transfer to use fusion pellets.


Both systems can be installed in the same motor, and changing the tank would be only needed for an operation. In this case, another tank involves the fissile bullets, and another one would involve the fusion material, what would shoot thru the system by small rifle. In this case, the magnetic accelerators would be unnecessary, because the accelerating for the fuel capsules would happen with standard ammunition, what can be installed in the ammunition belt.


And even the minigun would be used in that mission. That would make "Daedalus" or "Orion" possible to shoot right away to the other planets. In the real life, the normal turbogenerator could give enough energy for starting nuclear fission in the pellets, what is filler with Californium, but would the fusion possible. That is the question mark.  That system would be used to send the space probe in our own Solar system, but other stars are the little bit too far away.

https://en.wikipedia.org/wiki/Project_Daedalus

https://en.wikipedia.org/wiki/Project_Orion_(nuclear_propulsion)