Concept - Magnetic shield protecting/restoring Mars atmosphere

well, that would require alot of energy

Did they give the value of the magnetic field (emit by the module) ?, how they want to do it (from simple electromagnet version XXXXL or to use a ferromagnetic material also XXXXL)

Because with electromagnets, the energy should be enormous (although possible), with a ferromagnetic material, it is possible that this is not realizable (hard to have a strong magnetic field, constraint of transport, ...)

The electro-magnet is better, if it uses a nuclear reactor, it can be widely envisaged (the electromagnet only needs a high electrical intensity, the problem of resistance is not too problematic to give that the Ambient temperature will be -270 ° C / 0K

surface temperature vs core temperature of the coil
you would require a very good material

<p>it's certain</p>

solar sail, very not good, see on wikipedia the power of this technology, A sail of 110 000 m2 is necessary to obtain a thrust of 1 kg⋅m / s2)

not thrust is needed.... energy is in need
superconductors as suggested might be an option but usually these operate at temperatures little above the absolute zero.

space however is not cold
Our moon has no atmosphere and therefore can be considered to be in space.
The temperatures there get as low as -243 F in shadow.... which is still is a temperature of 120 Kelvin. All known superconductors require temperatures much lower than that.
And our moon as reference object also reaches a temperature of 253 F in sunlight (thats 395 Kelvin).

So simply putting something in space does not mean that it would automatically work as a superconductor.
Sunlight around Mars is weaker (decreasing per distance to sun²) but the energy is still strong enough heat up every material in space.

Another problem is that superconductors get influenced by magnetic fields. Most of them lose their superconductive state when magnetic fields get too strong.
I am no expert on this but when I imagine that we use a superconductor with really high energies to generate an extremely strong magnetic field. And then all of a sudden the magnetic field causes the superconductor to lose its superconducting state the whole device might instantly overheat because of the material resistence at such high energy levels.
I dont want to be close to Mars when that happens.

electromagnets could do that. It doesnt require huge energy amounts as the magnetic field of the earth is also not very strong. It has just to be strong enough to distract particles.
i first thought about a liquid iron core that helps the earth to generate the magnetic field, but that doesnt work in space

Quote from Huor

i first thought about a liquid iron core that helps the earth to generate the magnetic field

HO, Does this explain the fact that the eating field is of low power, but of a great distance on earth ??? (Because the field of the earth is 50 micro tesla, but for a very large area, while electro magnets of 10 tesla (1e + 7 micro tesla) are very powerful but do not have a very long range), bizzar ?

it does not have to be powerful, but it has to be big
and thats the problem

multiple small magnetic generators scattered around to form one big unit, kinda put small ones into a matrix with some distance between each, then the magnetic field just has to be huge enough to fill the gaps.
Coils do perform better if you put some iron in it, this empowers the magnetic field. Something along this would be my idea

Quote from Huor

Coils do perform better if you put some iron in it, this empowers the magnetic field. Something along this would be my idea

An electromagnet is composed of an ENTREFER, and a copper wire winding (a coil), if you feed just one coil, the result will be mediocre, but, with the ENTREFER, which is composed of a ferromagnetic material, Will '' directed '' the magnetic field

entrefer (sorry no traduction) = Increase the reluctance of the magnetic circuit so as to be able to increase the value of the intensity which causes saturation of the magnetic circuit.

this is a true electromagnet :

the principle is simple
every conducting material generates a "weak" electro magnetic field around it
even a simple wire does

a coil is practically just a method to bring alot of conducting material close together which as result increases the magnetic field strength
a coil without iron creates magnetic fields around the wire (the principle is that magnetic fields always will shape around the direction of the energy flow). this results in many different small magnetic fields in a coil.
And iron core has as already mentioned ferromagnetic properties which turn the many small magnetic fields into a big magnetic dipolar field.

Nonetheless, all this theory does not help to create a magnetic field strong enough to cover an entire planet.
We dont have to forget that the magnetic field of earth is a molten iron-nickel core that is powered by more energy mankind ever could produce.