Due to the extensive technical description created by the writers, we have a pretty good idea about how to can arranged lightsaber. And now a few decades, millions of fans of the universe of "Star Wars" dream of creating such technology. Let's see, in some approximation modern science to create a weapon a la lightsaber?
Here is the "original" in the context of a lightsaber. I>
To begin with we shall understand what's inside the Jedi lightsaber. Despite the name, this weapon is a ray of light is not. This is the wrong term (if at all possible to speak of the error in this case) of the same order as the "shooting star" in relation to a meteoric bodies burn up in Earth's atmosphere. Poetic, but no more. The most correct description of the operating principle of the lightsaber will include: creating a plasma arc that uses a magnetic field and focusing crystal is "pulled" is held in the form of a long thin line. But we must bear in mind that here was involved something very similar to the power used by the Jedi and the Sith to manipulate physical objects.
As an illustration from real life can lead here this arc, which changes its shape under the influence of a magnetic field while playing music:
Another example of the arc:
It is possible to imagine how this arc "taken" in the middle and pulled about a meter, turning in "Blade" sword. Although in reality it is a very difficult task, but to this we shall return.
We are already using technology very similar to that described above principle of action lightsaber. For example, in the apparatus for cutting metal in factories around the world use "ray" superhot plasma (up to 40 000 degrees).
This diagram shows the plasma torch device, and it is similar to what can be arranged as a lightsaber. Unfortunately, the similarity ends. Formed by the arc is very small in size (in the diagram it is labeled blue line). It ignites the gas is supplied under pressure, which acts as a heat transfer medium, dissipating the energy of the arc to the outside.
The main "negative" of the plasma torch, from the point of view of our problem is a very small amount of the arc. At best it can "stretch" to 12-15 cm. Furthermore, these devices consume huge amounts of electricity. Torch nozzle must be constantly cooled with running water, otherwise it will melt very quickly. In some torches gas stream acts as the cathode, and the cut surfaces - as an anode. As a result, the plasma arc is relatively long and placed outside the machine. But in any case, such as a weapon to use plasma torches will not work. At least because first you have to connect to your opponent high voltage cable.
So far we do not have the technology to pull and hold the arc by a magnetic field. Even if you pull it out of a hypothetical arm, it will be unstable, constantly leaning to the side in a random order, trying to "stick" to the nearest surface.
Further, since the arc will be very elongated loop located at a small distance from each other and the branches merge simply shortened arc again. But even if we somehow solve both problems described above, we have other: a powerful heat loss and non-material, if I may say so, the nature of the arc, that is, with its help it is impossible to block or parry enemy weapons.
Another way h4> Perhaps we should think in a completely different direction. So our task is to create a hand-held weapons, capable to cut a variety of materials having a glowing "extends" blade. To date closest variant theoretically available to us, this string of multiple strands composed of carbon nanotubes. Cutting performance can be imparted to the string by using a pulsed electromagnetic field and / or plasma. This kind of "energy vibro-sword" in its design will resemble a bow, you ought to somehow pull this wire. Otherwise, get the whip, not a sword.
To ensure "vydvigaemosti" blade may have to make a tough part of the blade of the telescopic and wire placed in a coil in the handle. To ensure a high mechanical strength can be made telescopic part as carbon nanotubes. The rigid part of the blade is thin enough to pass through the material to be cut after the red-hot wire, and at the same time thick enough to withstand the impact of enemy weapons.
To maximize the life of the cutting wire and reduce heat loss, it is necessary to supply power directly before contact with the surface being cut, letting the momentum from the handle to the tip. Thread forming wire will gradually wear out as they pass the charge on the outer layers to the core wire. As a result, there will be a permanent effect of ablation, which will require regular updating of the wire, because it will be very thin. What it will be thinner, the higher the cutting ability of weapons.
Source of energy will still be very large, perhaps it will have to be carried in a backpack. It will be necessary to solve the problem of thermal insulation of the handle, including by means of forced restrictions uptime. Given the very high brightness of the red-hot wire, you will need to use special light protective goggles. If we are talking about the use of the most advanced science, the glasses can also be more than just optical filters. Perhaps, it is advisable to use smart glasses. Being completely transparent during normal wear, they will be dynamically obscure or opaque to do only a small area of the field of view, sufficient to cover the red-hot glowing wire.
That's the way might look like, as a result, described "energy vibro-sword»:
And what is more or less available (or future) technology you have proposed to use for such handguns?