Savage My Science! (part 1-Shields)

DocFlamingo

Malcontent
Joined
Dec 15, 2008
Messages
28
Location
Stuff (see "Things")
Hey all! Working on my first SciFi novel and wanted any feedback people might have on some hand-waved technology. Don’t be gentle, I can take it. Basically, I was interested in knowing if people thought these explanations were patently absurd or workable.
For this example, I’ll take my “Shield” technology. I know it’s fallen out of favor in most written SF now but I think that much of the self-consciously “Hard SF” is what’s killing the genre. It’s all dated in a few years of publication and, frankly, who care what we’re SURE can be made to work…

Dissipater Field: A defensive energy field comprised of charged particles immersed in a magnetic field, used to counter the effects of energy weapons. D-Fields are “hull-huggers,” meaning they are formed approximately 1 meter off the ship’s outer hull (with a thickness ranging from 0.5m to 5m) and conform to its shape. Ships with active D-fields are recognizable by a dim red glow surrounding the craft.
Particle density can be manipulated in order to reinforce the shield in the direction of attack or allow “ports” for the ship’s own weapons or launch craft to pass through. A ship mounted D-Field can charge quickly from capacitors, in about 1 minute per 10,000 tonnes of ship mass. Ground based, “suspended” versions require numerous generators and 1 minute per 10m2 of surface area.

Repulser field: A defensive energy field used to deflect physical objects away from a vessel, both in navigation and combat. Repulsers are a type of gravimetric convection field, forming a roughly spherical shell around the craft that can be dozens of meters thick. Equally suited for ship-mounting and ground-based instillation; the field is invisible to the eye, oscillating frequencies several hundred times per second.
Ship-mounted repulser fields typically remain active whenever the ship is in motion to protect against navigational hazards. Though possessing a sharply defined outer edge, they are volumetric and continue down to within a few meters of the hull. The field has a sponge-like effect, growing in strength the closer one approaches the ship. This hampers the progression of incoming projectiles with increasing force, causing them to move to a less dense region away from the vessel.
This density convection effect allows the vessel’s own launch craft and projectiles to pass through the shield easy, even gaining an acceleration boost. The field must be lowered to retrieve launch craft however. Repulser field have no appreciable effect on energy weapons either incoming or outgoing.
 
Energy weapons being what? Particle beams? The concentrated magnetic fields would deflect, or at least drastically slow, those without the existence of the trapped particles. electron or proton beams (or anti-protons or positrons) would build their own minature Van Allen belts round the hull, and even heavier nuclei would have their energy levels seriously reduced.

However, energy weapons as in EM radiation:visible light, infra red, microwaves, X-rays, gamma rays and any other bits of the spectrum wouuld be essentially uneffected, so a laser or maser would not be deflected, and bringing the hull to a mirror finish to reflect all frequencies would be a considerable challenge.

If you used superconducting coils, the magnetic field would maintain itself with no power dissipation, except when under attack.

The repulser is interesting; given that technology, I can build you a nice insystem drive, a couple of very interesting weapons and a communications system which would be extremely difficult to jam, just off the top of my head. but even hetrodyning gravity waves, I don't see you slowing really fast-moving objects in a few metres, and presumably a couple of hundred metres would complicate close fleet manoeuvres.
 
would it make more sense, given that repulsers would not stop really fast moving objects, merely to slow them a little so that shipboard defenses could get more time to lock on them? or to deflect the effects of any non-contact explosives?

i could do with them repulsers on the shopfloor, i tell thee.
"Where's the Beatles?"
well, they're not in the TV Comedy DVD section, pal. move along.
 
Did you know that Heisenberg's uncertainty principle has now been disproved? Basically this means that any particle movement anywhere is reflected throughout all particles in the universe? Gives a whole lot of meaning to particle dispensers, ESP, absent healing and so on.....:)
 
Hi Doc,
I like what you've put forward and whilst i'm not a science buff per se i see no reason why your system can't be put forward and work; after all it is science fiction ! :D
In response to chris's point about probably not slowing fast moving objects in a short distance, i took your repulser to be aimed at deflecting such things as space debris, whether natural things like fragments of asteroids or fragments of enemy ships hulls and the like, is this what you were intending? Also is your statement of 'stopping objects with increasing force' down to a kind of effect similar to armour weave?
Either way i have no problem reading a book based on this kind of idea.
 
What I meant by increasing force was that as an object draws closer the density of the field increases, causing the object to seek an easier path which will always be away from the ship.
 
Ok.

Not as a scientist or anything but I get the Dissipater Field. It seems to make sense that it acts very much like armour when it comes to energy based weapons; taking damage itself and therefore using energy (where you get the old 'shields at 20% Captain!' comments).
Although I would have thought it would be shield energy at 20%, as the energy would come from one source. :rolleyes: Unless of course you had different generators for the different shields, then you'd have the whole Star Trek 'port shields collapsing Captain!' thing going on.

Not so sure about the Repulser field. I think at best it could slow a projectile down in the hope the armour would be able to withstand the impact, but I couldn't see it repelling an object. I always liked the BSG take where they used 'interceptor fire' or flak to dispense with the incoming fire. :D

That's my thoughts anyway.
 
On the Repulser filed: That (Shadow Trooper's comment) is basically what I'm meaning in terms of incomming missiles and the like. It is mainly a defense against the small debris that could cause severe harm to a ship while moving at speed. As a weapons defense it's augmentation to hull armor and helps anti-missile batteries get a clean shot. Large objects moving at high speed would pass through but would at least be slowed down and hopefuly redirected enough that a hit wouldn't be head-on.
 
Um, if you look at eg Alcubierre proposal...
Alcubierre drive - Wikipedia, the free encyclopedia
... it can be visualised as a sort-of invisible tank-track shoving real-space backwards. Or side-wheeler paddle-boat...

That is the main ship-drive, but it may consist of or be augmented by many 'local' modules. Potentially, these may be pulsed skew in point-defense mode to send an in-coming lump tangential and clear. Think sloped armour...

FWIW, I did an end-run on Alcubierre for my Convention tales by reversing the polarity, creating a 'double bubble' per...
Limaçon - Wikipedia, the free encyclopedia
Care: link has animation which takes a while to load.

... And calling resulting interstellar propulsion *plus* shield the Exponent Drive. Ships gotta carry fore&aft dust shields for in-system work and in case they gotta drop out of Exponent Drive due interstellar mascon...
 

Similar threads


Back
Top