Alternatively a thin coat of wax and a keen karate student to wax on and wax off, will also defeat evil laser wielding sharks.
Laser deflector shields possible with today's tech – but there's one small problem
A new paper from the University of Leicester claims that it's technically possible to build shields around a spacecraft to protect it from laser fire using available technology, but with the somewhat troubling side effect of leaving the pilot unable to see where he or she is going. The research, published [PDF] in the peer- …
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Saturday 3rd May 2014 07:15 GMT Grikath
Re: re. mirror
Eventually... So do plasma shields , as they absorb the energy, so particles will escape the containment field. So unless you keep injecting plasma, any incoming energy the shield is designed to deflect will degrade it as well.
Maybe the idea has merit, but you're still running into the "needs humongous amounts of energy" requirement that cannot be filled currently.
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Saturday 3rd May 2014 22:20 GMT Trevor_Pott
Re: re. mirror
"They have to be 100% reflective at all encountered laser frequencies, but they're not, so they would heat up, degrade and vapourise."
Aye, but properly designed they not only reflect some of the oncoming fire but function as ablative armour. Plasma sheilds could be useful for a starship looking to project a field that works somewhat like a proper navigational deflector. If we could find a way to regenerate ablative reflection armour we'd have a half-decent combat hull to boot.
Perhaps a substance that could be secreted onto the hull that would instantly harden/freeze such that it had the relevant reflective and ablative properties? The issue with both ideas (plasma shields and regenerative ablative armour) is that is having to carry the stuff around everywhere. If you get too far from port and get into the shit you have to limp back home to refill your defensive capabilities.
Now, if you could collect the relevant elements using a bussard collector (perhaps by parking next to a gas giant, star of other friendly source of volatiles) then you might be able to make all of this lovely stuff in situ. Which brings us back to the same problem as in the paper: power.
The magnetic confinement for plasma shielding and the bussard collectors would require enormous amounts of power. Terawatts upon terawatts. Element separation, refinement and manufacturing of polymers for your armour would also take a stupendous amount of power.
Matter/antimatter is unlikely as a power source: even if we could figure out how to make antimatter without using a significant fraction of the output of a star, you piss away more than half the energy from the reaction as unrecoverable "energy" like neutrinos. That leaves fission and fusion. Fission because Uranium is bloody everywhere and fusion because - while fission is cute and all - fission just can't deliver the power needed.
So, in order to play the space combat game with even the remotest chance of survivability, each starship will require at least two power plants: a fission "spark plug" and a set of truly enormous fusion reactors to output the kind of energy needed. Napkin maths say that you're probably looking at a ship so large that Kirk's Enterprise* would be considered a shuttlecraft beside it.
Which means, quite simply, "not in our lifetimes."
*Not the Jar Jar Trek version
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Saturday 3rd May 2014 02:54 GMT Voland's right hand
No, it cannot - you cannot realistically maintain the plasma bubble under atmospheric conditions especially if you are traveling at 2Mach+. This is a space-only option.
Also, as far as practical implementations go, this is more of a Babylon5 solution that Star Wars. Firing plasma into the path of the laser cannon in order to disperse it is something workable while trying to surround yourself with plasma probably is not.
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Saturday 3rd May 2014 08:13 GMT Chris T Almighty
Re: "spin and a highly-reflective coating"
If "Moving your finger from one place to another on a touchscreen" is patentable, then I'm sure "Airbourne cloud of discoballs to defeat attack by lasers" would have been worth a punt. And it would certainly liven up the afternoon at the Patent office.
Sadly, by making your idea public, we're all now free to clad our spaceships in 70's sparkle, and you won't get a bean. You'll be kicking yourself one day.
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Tuesday 6th May 2014 21:54 GMT Fred Flintstone
Re: Start wrecking
Star Wreck is a Fan Group in Finland that put out a Full Length Babylon 5 / Star Trek crossover parody movie. Check them out at: http://www.starwreck.com
The movie is (or was) available on DVD.
The first release you could download from their website - the whole merchandise thing came later. It's still available on Youtube too - well worth it IMHO :).
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Saturday 3rd May 2014 03:38 GMT Anonymous Coward
All you need is one frequency that can pass through
Then you can have a swarm of drones around it (or in the vicinity, away from all the nasty laser beams) to be your "eyes".
That means the enemy will need its own drones to take our your drones. The stockholders will like this plan: Give the deflector shield option away for free, but charge for the drones. At least, that's what will happen if Gillette expands into starships.
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Saturday 3rd May 2014 18:40 GMT Anonymous Coward
Re: If an ultra-violet camera can see out ...
Actually, rotating the shield frequency is exactly what you'd do. If you use my "swarm of drones" idea from the earlier post to do your seeing, and need one frequency to pass through to communicate with them, you'd have that frequency changing thousands of times per second.
Think of absorption lines in a spectrum. You want a spectrum with a single absorption like, that changes constantly. The drones are synced to the ship's clock, and know how far they are from the ship, so they can change their frequency in a way that's timed to the shield frequency changing.
Ideally, you'd only have a handful of places on the ship where even that one frequency gets through - the antenna sites the drones have their narrow communication beam (laser, probably) pointed at.
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Saturday 3rd May 2014 05:36 GMT DerekCurrie
EM Wave Piloting Need Not Require Light
There are other ways of piloting that don't require the observation of a light source. There are plenty of other wavelengths of EM radiation to detect out there in the universe besides the wavelengths used in lasers. I would imagine the pilot would be looking at a screen that reinterprets other EM energy into light representations on screen. A simple example would be the infrared images we all have seen, which aren't actually showing infrared radiation, but a representations of IR wavelengths into visible images. Theoretically, the same is possible for much of the rest of the EM spectrum that would not be used in lasers.
I'd take credit for the concept, but it's not actually anything new. It's simply not in the public vernacular and hasn't had much use outside of the barbarism of war and ghost hunting.
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Saturday 3rd May 2014 08:17 GMT Chris G
Snails
Have been using this method if not this technology for millions of years: hide inside an impenetrable shell relatively speaking, and wait until the danger has passed before you stick your head/eyestalks out.
Perhaps it would be possible to pass sacrificial sensor stalks through the plasma field to see and navigate with, obviously they would be damaged or destroyed with a direct hit so a system for extending replacements would be necessary.
You could also use optic fibre stalks passing through the field to deploy your own lasers.
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Saturday 3rd May 2014 10:10 GMT Sir Sham Cad
Shields Up! The Physics of WHAT?
Star Wars mentioned "Deflector shields" and these appeared to be, essentially, invisible barriers that hugged the external contours of the ship. Every laser blast that was seen hitting the Falcon, Rebel fighters (of all designations) and Star Destroyers without doing damage (absorbed by the deflector shield) appeared to strike the surface of the ship. The only exception was the deflector shield surrounding the space around the second Death Star that was beamed from Endor and that was for a specific purpose of keeping the Rebel Fleet at super-laser range.
Star Trek has visible shield barriers surrounding the ships at a distance as described in this paper. We know that the power output of the matter/antimatter annihilation reaction in the Warp Core of a Starship is sufficient to warp space itself whilst also powering all the ship's weapons and other power needs. Also, the phrase "Shields Up, Red Alert!" is from Star Trek.
Yes, I am nitpicking the nerd culture references rather than addressing the science and I'm not ashamed!
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Saturday 3rd May 2014 10:45 GMT Don Jefe
Re: Shields Up! The Physics of WHAT?
Vessels in Star Trek only have visible shields when a vessel is viewed on the view screen. Definitely the Bridge screen, I'm not sure if cabin screens show shields or not. Cabin level equipment seems to be reserved specifically for getting Unionized set designers credit, and to show that sexy underwear is not compatible with transporters (or something).
I used to think it was all just a tiny forgotten detail, but I'm now quite certain it is very deliberate. When Sam Beckett was Captain they frequently showed things from a viewpoint outside the ship and the shields weren't visible but back on the bridge the shields could be seen on screen, mostly. The same occurs in all the feature length films.
Sometimes, especially in Voyager, a view from outside the ship will show shields being energized (which makes total sense, any matter in the space where the shield actually forms would be annihilated, like a bug zapper). The Delta Flyer had shields, but they were never visible, even on screen, perhaps because the vessel wasn't Star Fleet. But Voyager also had those silly variable swing thrusters that changed position according to the amount of confidence displayed by Bridge officers, apparently, so it's hard to say why the Delta Flyer Shields weren't visible.
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Saturday 3rd May 2014 11:32 GMT Don Jefe
Hands Free
It's not like there's anything to see anyway. Space was filmed solely in black and white, and even that becomes more of a white with black specs until you exceed the speed of light. If you want color you have to apply the Turner Filter.
If FTL travel were possible there's less than any point in having a view. You'll already have plowed over whatever it was at the same moment the whatever became visible. They could probably offset the costs of voyages by just showing endless adverts to the people onboard. It would be more interesting during the vast spaces between promiscuous aliens and exciting enemies.
At any rate, being able to see outside is not an impediment to navigation. If it were, international travel and submarines wouldn't be nearly as scary, or successful. Assuming that we found a place to visit and figured out how to get there the Hansel and Gretel breadcrumbs are still the best way to navigate. The spacecraft drops small stationary satellites behind it which are upgrade if repeat travel is desirable and other craft do the same in different directions, you end up with a huge GPS (Galaxy Positioning System).
Incidentally, Star Trek: Enterprise does that very thing, but the idea was first floated in the 1950's. Setup temporary navigational beacons and upgrade as requirements dictate. You only need signals from two of those beacons and you let the computer (or socially awkward crewman) drive.
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Monday 5th May 2014 13:54 GMT Anonymous Coward
Re: Hands Free
Been thinking about the 'space navsat' idea and don't think it'll fly:
1) You'd have to cancel out any intrinsic velocity from the ship that dropped them...this would be colossally expensive
2) Stars move; so the endpoints of your trail would get quite quickly out of date
3) Have you seen what a paint-fleck can do to something merely in orbit?
(#5 here: http://www.cracked.com/article_19158_the-6-weirdest-dangers-space-travel.html)
...now imagine something satellite-sized at the sorts of speeds you'd need for interstellar travel. Space is big and the chances are slim; but you'd be dropping large lumps of stuff directly into the path of future travellers.
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Saturday 3rd May 2014 21:04 GMT Don Jefe
Re: So safe on re-entry then?
If the reentering vessel isn't a missile you just have to wait for it to land. That whole returning to Earth thing has been the Achilles heel of any space domination hopes/dreams since the 1960's.
Sure, it isn't sexy, or clever, but those aren't things you really want involved in any conversation about 'shooting'. Launch facilities are impossible to hide or shield and stuff coming back is even recorded by amateurs (advanced). Until something changes with our technology, a lot, there is no fear of unfriendly or unwanted space domination by any nation.
I'm sure the boos and hisses I'll get were no worse than when the DoD guy said the same thing 50 years ago :)
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Saturday 3rd May 2014 21:31 GMT ecofeco
I direct you to...
Yes, I know the article is only about laser shielding, but this is related in that the whole technology is moving forward.
Check the dates as well.
http://www.telegraph.co.uk/technology/news/7487740/Star-Trek-style-force-field-armour-being-developed-by-military-scientists.html
http://www.theguardian.com/science/2001/aug/19/weaponstechnology.internationalnews
https://www.youtube.com/watch?v=o7rxBifd0cY
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Sunday 4th May 2014 15:11 GMT John Deeb
In space nobody sees you scream
Article: "...would also not allow light to reach the pilot".
Note: in space it's pretty dark unless one is close enough to a light source like a star. Pilots won't steer by visible light unless they are flying in a carton cabin hung inside a well lid studio. But I guess radar beams won't go through the plasma either. Enemy ships need to be detected at least with "sub-space particles scanners" one would presume. At least in Startrek.
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Sunday 4th May 2014 15:43 GMT mIRCat
Moon Base One!
"The other drawback is physical. Any spaceship carrying the shield would need a massive magnetic array to contain the plasma bubble, not to mention a power source capable of maintaining it."
It sounds suitable for my future moon base! Or other ground based operation that has a large underground power plant.
Sharks with laser beams not included.
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Sunday 4th May 2014 23:25 GMT CaptSmeg
A simpler solution
As Traveller was mentioned further up I thought I'd note another simpler approach that I recall first hearing about in that RPG about 30ish years ago. It always struck me as a very elegant and simple way to deal with directed energy weapons in space...
Use a "sand thrower", basically a big shotgun which you fire sand in the direction of a hostile ship resulting in a large obscuring cloud between you and her. Lasers etc. are easily absorbed / scattered by the cloud. It also provides nice cover while you deploy decoys & drones. Cheap and effective. When you shoot back you are much better off using good old rail guns... Plasma or sand aren't going to stop a slug.
I think any real space fights are going to be much more like the Wild West than Star Wars.
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Monday 5th May 2014 01:37 GMT dan1980
Re: A simpler solution
@CaptSmeg
"I think any real space fights are going to be much more like the Wild West than Star Wars."
I think you're right.
I mean, right now our ability to inflict damage is far greater than our ability to prevent it. Collectively, our defense consists of destroying those assets that can harm us. US warplanes might be whizz-bang-awesome but their ability to fly unhindered is largely due to targeted strikes against warning and defense installations. This was seen to devastating effect during the beginning of 'Desert Storm'.
Protection therefore lies not in hardening a structure against attack but preventing any potential attack getting in range.
I suspect, actually, that if such battles were to take place at some point in the far future, that they would be more like naval battles. Each vessel would be essentially fragile, able to be destroyed with a single hit, so engagements would happen at long range, either with large guns, like battleships, or by utilising smaller fighters, as carriers do.
In such engagements, lasers would more likely be used as point-defense to destroy incoming projectiles, just as they are being developed now.
Or is it too much to hope that the massive effort and expense required in such ventures, coupled with the technical hurdles of powering weaponry and defenses on top of normal ship functions, would require us all to grow up a bit and focus on working together for the good of all.
Yes, I suppose that is a bit of a stretch.
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Tuesday 6th May 2014 10:54 GMT Psyx
Re: A simpler solution
The problem with 'sandscreens' is that both vessels are travelling so fast at such a distance that a 1km cube 'sandscreen' is going to be of zero use after about a second, when it will cease to be in the firing line.
Railguns have the disadvantage of long flight times and lack of terminal guidance. A missile is going to be slower, but can change delta-V at a rate that would turn a human crew spaceship to pulp.
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Monday 5th May 2014 04:32 GMT T. F. M. Reader
Cool, we have unlimted power now! Wait...
I've read the paper. Frankly, it looks like it was written by students who attended exactly 1.5 lectures on plasma physics. And it does not contain any information that would *not* be included in the first 1.5 lectures in plasma physics in any university course.
If they only offered any feasible way to actually contain a hot plasma shield around a spacecraft - no, "you just need a sufficiently strong magnetic field" is not good enough as magnetic field does not contain plasma in all directions, that's what you normally learn in the second half of the second lecture in plasma physics - we would have controlled thermonuclear power by now. The problem of magnetic containment is what has been hindering the fusion efforts for the last few dozen years. The Earth's ionosphere that they quote as an example is held in place by gravity, not by magnetic field...
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Monday 5th May 2014 04:39 GMT IvyKing
Ionosphere Refracts, not Reflects
The ionosphere refracts radio waves, were the maximum angle of refraction is roughly proportional to the wavelength times the electron density. At a low enough frequency, the refraction angle can equal 180 degrees, where the low enough is on the order of 2 to 10 MHz depending on time of day and sunspot number.
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Monday 5th May 2014 19:32 GMT Bakana
Another option
There IS another option. One that just requires the ship to have Really Big Hoinking Engines and a really Big fuel tank.
Coat the entire outside of the ship with a thick coeat of Ice.
And always Rotate the ship during combat.
It does make Aiming whatever weapons you postulate your ship uses more difficult, but we already have weapons systems on fighter aircraft which deal with that problem.
As always, whatever weapons & shields You have, your Enemy ships are going to have something Similar, otherwise, it's not a Battle, it's Shooting Fish in a Barrel, depending on which side has the advantage in Technology.