A Quick Question

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NewAgeOfPower NewAgeOfPower's picture
A Quick Question

Anti-proton proton collisions generate what products precisely?

Thanks.

As mind to body, so soul to spirit.
As death to the mortal man, so failure to the immortal.
Such is the price of all ambition.

Decivre Decivre's picture
Re: A Quick Question

NewAgeOfPower wrote:
Anti-proton proton collisions generate what products precisely?

Thanks.

In simplest terms, annihilation produces a collection of particles whose total quantum numbers equate to 0. So, the product tends to vary wildly, especially with proton-antiproton collisions. The energy of the annihilation is also a factor, as low-energy annihilations tend to produce simpler output than high-energy collision (it can produce as little as two photons).

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Arenamontanus Arenamontanus's picture
Re: A Quick Question

NewAgeOfPower wrote:
Anti-proton proton collisions generate what products precisely?

Basically, the first encounter will produce a three pi-mesons (one quark and one antiquark each). It also releases lots of energy, which will be distributed as kinetic energy of the mesons, gamma rays or even production of extra mesons.

The pi-zero mesons will then annihilate one component quark with its opposite, releasing two gamma photons. The charged pi mesons will mostly decay to muons plus neutrinos (the pi plus to a muon plus a muon-neutrino, the pi minus to a muon plus a anti-muon-neutrino), although a few go straight to electrons and positrons (plus the right neutrinos).

Finally the muons will decay to positrons (or electrons, depending on charge) plus more neutrinos.

So in the end we get lots of gammas, neutrinos, positrons, and some electrons (due to charge conservation there will be more positrons). Remaining positrons may hit electrons and turn into more gammas.

Extropian

NewAgeOfPower NewAgeOfPower's picture
Re: A Quick Question

Thank you guys. Next stage then:

Lasing medium for gamma rays?

You know where this is headed : ]

As mind to body, so soul to spirit.
As death to the mortal man, so failure to the immortal.
Such is the price of all ambition.

Arenamontanus Arenamontanus's picture
Re: A Quick Question

NewAgeOfPower wrote:
Lasing medium for gamma rays?

You mean using the ambiplasma for a gamma laser? Hmm... a bit like a chemical laser, I guess. You get excited particles in a laser cavity and get them to lase by interacting with a local optical field. The main problem is that it is very hard to make good mirrors for gamma rays and most energy will be distributed across several spectral lines - you will likely have big losses. But as an explanation of the utterly powerful one-shot laser howitzer it makes sense.

Extropian

Tyrnis Tyrnis's picture
Re: A Quick Question

NewAgeOfPower wrote:
Thank you guys. Next stage then:

Lasing medium for gamma rays?

You know where this is headed : ]

You want to shoot people with a beam that makes them turn into giant green(/grey/red) rage monsters? ;-)

NewAgeOfPower NewAgeOfPower's picture
Re: A Quick Question

Arenamontanus wrote:
NewAgeOfPower wrote:
Lasing medium for gamma rays?

You mean using the ambiplasma for a gamma laser? Hmm... a bit like a chemical laser, I guess. You get excited particles in a laser cavity and get them to lase by interacting with a local optical field. The main problem is that it is very hard to make good mirrors for gamma rays and most energy will be distributed across several spectral lines - you will likely have big losses. But as an explanation of the utterly powerful one-shot laser howitzer it makes sense.


No worries. Nobody expects high efficiency from a bomb pumped weapon.

About 9 percent efficiency is probably expected from this Graser setup.

As mind to body, so soul to spirit.
As death to the mortal man, so failure to the immortal.
Such is the price of all ambition.

Lorsa Lorsa's picture
Re: A Quick Question

http://en.wikipedia.org/wiki/Induced_gamma_emission

Might give you an idea of what sort of lasing medium could potentially be used. As stated though, finding something that has a reflectivity of 97+% for gamma rays will be extremely difficult.

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Arenamontanus Arenamontanus's picture
Re: A Quick Question

Lorsa wrote:
http://en.wikipedia.org/wiki/Induced_gamma_emission

Might give you an idea of what sort of lasing medium could potentially be used.

Nuclear isomers are nice, but not powerful enough to do more than act as a primer for the antimatter laser. After all, they just change nuclear energy states - far less energetic than the annihilation of nucleons.

Quote:
As stated though, finding something that has a reflectivity of 97+% for gamma rays will be extremely difficult.

At some point you just need to do good technobabble:

"OK, I admit that I am impressed by your Keraunos missile. Let me guess: a staged series of ambiplasma detonations that use earlier stages to make a radiation field for later stages, confined by an antimatter driven implosion of a metallic hydrogen cylinder. Probably some nuclear primer. Despite your Republic's insistence on not using AGI I bet you used some very heavy duty mainframes to do the modelling and genetic algorithms needed to optimize the design - which explains those odd butterfly-like radiation lobes.

What I really can't figure out is the kind of target that would actually need that graser lance effect. It looks ideal for absurdly thick composite armour rather than hardened bases - are you going world-turtle fishing?"

Extropian

NewAgeOfPower NewAgeOfPower's picture
Re: A Quick Question

Arenamontanus wrote:

At some point you just need to do good technobabble:

"OK, I admit that I am impressed by your Keraunos missile. Let me guess: a staged series of ambiplasma detonations that use earlier stages to make a radiation field for later stages, confined by an antimatter driven implosion of a metallic hydrogen cylinder. Probably some nuclear primer. Despite your Republic's insistence on not using AGI I bet you used some very heavy duty mainframes to do the modelling and genetic algorithms needed to optimize the design - which explains those odd butterfly-like radiation lobes.

What I really can't figure out is the kind of target that would actually need that graser lance effect. It looks ideal for absurdly thick composite armour rather than hardened bases - are you going world-turtle fishing?"

You DID read my homebrewed femtomaterial, "Ether", right?

: ] A good argonaut not only develops new technologies but attempts to develop a counter to said system... just in case. Even if it requires building a portable, One-Shot LHC.

As mind to body, so soul to spirit.
As death to the mortal man, so failure to the immortal.
Such is the price of all ambition.

Arenamontanus Arenamontanus's picture
Re: A Quick Question

NewAgeOfPower wrote:
You DID read my homebrewed femtomaterial, "Ether", right?

Ah! Well played.

Quote:
A good argonaut not only develops new technologies but attempts to develop a counter to said system... just in case. Even if it requires building a portable, One-Shot LHC.

Sounds like a great heuristic to use, both in the game and real life.

Extropian

NewAgeOfPower NewAgeOfPower's picture
Re: A Quick Question

Arenamontanus wrote:

Ah! Well played.

Sounds like a great heuristic to use, both in the game and real life.

What did you think of it? Not a new tech, really, just... found something incredibly awesome... Located:

http://www.eclipsephase.com/ether-exotic-femto-material-eyes-only-my-players-keep-out

Well... I am called paranoid... But I find most of humanity simply unprepared.

As mind to body, so soul to spirit.
As death to the mortal man, so failure to the immortal.
Such is the price of all ambition.

Arenamontanus Arenamontanus's picture
Re: A Quick Question

I like the idea of bizarre femtotech left behind by whatever built the gates, but the ether seemed to be a bit too useful and manageable for me. Sure, it might have important properties we do not notice (just like a caveman might find a laptop a good serving tray), but having it being manipulable with psi seems to be a bit of a cop-out. But this is mostly aesthetics: the real question is what story you want to tell with it?

Extropian

NewAgeOfPower NewAgeOfPower's picture
Re: A Quick Question

Arenamontanus wrote:
I like the idea of bizarre femtotech left behind by whatever built the gates, but the ether seemed to be a bit too useful and manageable for me. Sure, it might have important properties we do not notice (just like a caveman might find a laptop a good serving tray), but having it being manipulable with psi seems to be a bit of a cop-out. But this is mostly aesthetics: the real question is what story you want to tell with it?

You're jumping to conclusions too quickly here : ] To me, it feels like the Fixors/Scour Ring... useful, rare, unknown reason for construction, principles of operation... And a great way to raise the hair on the back of your more physics-familiar player's heads.

I never said it was produced by the Gatebuilders... No sir...

Again, I posted it up on the forums to give other GMs a good way to introduce some plot hooks-

-What if the properties we prize are simply byproducts of it's true nature? What, then, is this material's true purpose?

-How many transhuman lives will be squandered fighting over this incredibly rare resource?

-Do we actually know its stable?

-What is the true nature of Psi? How does it work?

-Did the Gatebuilders make this substance? If so, why doesn't it shunt through gates? What does that indicate about the Gate system? (Are the gates just simulations, that can't simulate this substance? Or are the gates zero-width wormholes that allow information to pass, and then reconstruct? Why can't they reconstruct this material? If neither of those, does this material act as Anathema to the wormhole stabilizing materials? What exactly... etc)

-Why was the first (and future, in my campaign) samples found opposite of a Gate's local gravity well?

-If the TITANs could not understand it....

Do you see what I am driving at?

As mind to body, so soul to spirit.
As death to the mortal man, so failure to the immortal.
Such is the price of all ambition.