Interstellar relativistic propulsion

[Ronald Held]

I am delivering a talk at a convention on early colonization
efforts. Are there any links to antimatter rockets moving at sublight speeds? A breakdown of components is needed to assess how long it would take to build one.

 

[sojourner]

You might start here:
http://www.projectrho.com/public_html/rocket/engines.php
with particular attention to this part of the site:
http://www.projectrho.com/public_html/rocket/antimatterfuel.php

 

[Retu]

Short googling lead me to this paper. Seems to be a good place to start.

http://sci-hub.cc/10.2514/6.2003-4676

 

[Ronald Held]

I will check it our, thanks.

 

[Ronald Held]

The last paper is high useful. Any ones like that but more recent?

 

[Retu]

The last paper is high useful. Any ones like that but more recent?

Copy the title of the article to https://scholar.google.com/ and then click on the related articles. You should find more recent ones as well.

 

[publiusr]

Book review on the topic
https://www.linkedin.com/pulse/book...-titze?trkSplashRedir=true&forceNoSplash=true
http://www.nasa.gov/directorates/spacetech/niac/index.html

This link interested me for years: http://www.space.com/2129-research-warps-hyperdrive.html

His analysis found that a mass moving faster than 57.7 percent of the speed of light will gravitationally repel other masses lying within a narrow "antigravity beam" in front of it. The closer a mass gets to the speed of light, the stronger this antigravity beam becomes. Thus, the forward antigravity field of a suitably heavy and fast mass might be used to propel a payload from rest to relativistic speeds, Felber explained.

There may be hypervelocity stars with close to that speed:
http://www.wired.com/2014/12/superfast-stars-black-holes/

All you have to do is stand in front of one--and you speed up with no type of drive at all--so the idea goes.

João Magueijo's Variable Speed of Light ideas may allow FTL travel along the paths of cosmic strings
http://discovermagazine.com/2003/apr/cover

Fortunately, Magueijo's varying speed of light theory could exploit a loophole in Einstein's unbreachable rules. Magueijo admits the idea is far-fetched—something he pursued for fun. But it is mathematically consistent within the framework of his theory. He calls it fast-track space travel. The tracks in this case are cosmic strings: concentrated strands of energy, thinner than an atom, left over from the Big Bang. No one has yet observed cosmic strings, but some theories predict that they should crisscross the cosmos. A three-foot-long piece of one cosmic string would weigh about the same as Earth.

According to Magueijo's calculations, the speed of light near a cosmic string would increase dramatically: A spaceship traveling on one of these fast tracks could go well above the standard speed of light—186,282 miles per second—while still traveling at a fraction of the accelerated light-speed limit around the cosmic string. The laws of special relativity would still hold—time would slow down for the travelers. But because they would be traveling at a fraction of the cosmic string's light-speed limit, the effect would be minimized; astronauts could travel to the stars and return to Earth to find that months, not centuries, had passed.

For fiction--
This may also explain space lanes in star trek. Perhaps warp travel between worlds is assisted by space lanes--where warp limits in free space allows slower transits.

New particle? http://www.inquisitr.com/2928021/is...sts-electrified-by-discovery-of-new-particle/

SCI-FI
http://nextbigfuture.com/2016/04/quantum-entanglement-harvesting-in.html
http://www.escapistmagazine.com/art...n-Light-Travel-Methods-and-Their-Plausibility

 

[Tim Walker]

As I recall, Dr. Robert Forward wrote a book about "mirror matter". I believe that he studied sunlight probes powered by antimatter.

 

[Nebusj]

All you have to do is stand in front of one--and you speed up with no type of drive at all--so the idea goes.

Yeah, ``stand in the right place and suddenly accelerate to pretty darned near the speed of light, possibly using the well-known antigravity produced by rapidly moving masses'' is an idea that sounds quite reasonable and physically plausible.

 

[publiusr]

I never said I bought it--but there it is.

Forward's negative matter propulsion: http://arc.aiaa.org/doi/abs/10.2514/3.23219?journalCode=jpp
https://tu-dresden.de/die_tu_dresde...tive Matter Generated by Electric Charges.pdf

There is a bias drive, a diametric drive, etc.

Interesting
http://www.spacedaily.com/reports/Scientists_discover_new_form_of_light_999.html

 

[Ronald Held]

Sorry I have not responded back for so long. Still checking out these links. I knew of the negative mass drive a while ago, no idea where to get negative mass from.
Anything else?

 

[Asbo Zaprudder]

Negative gravitational mass or negative inertial mass? Charged particles, such as electrons, in a periodic potential can exhibit effective negative inertial mass and accelerate in the opposite direction to an applied force. Negative energy states were predicted by Dirac and negative energy density is also expected to be exhibited by the Casimir effect under certain conditions. Gravitational potential energy is also negative in Newtonian mechanics. Because all energy has an equivalent inertial mass (E=m.c^2), this suggest that the mass must be negative (although the concept of gravitational energy in General Relativity isn't well defined).
https://www.quora.com/Can-particles-have-negative-mass-If-so-what-would-it-mean
https://en.wikipedia.org/wiki/Mass_in_general_relativity

 

[Ronald Held]

In order to make the request more trackable, let us stick to sublight interstellar propulsion.

 

[publiusr]

That's the best bet. Some talk about more than just Planet Nine.

Good--more gravity assists.