If the warp drive "focuses" the dirt and particles in the front of the ship, releasing them upon the field's deactivation, then that's maybe a solution to the problem of high energy impacts. And probably of dust up to certain grain size.
So other than what is described in the links below, is there any proof that plane waves can travel slower or faster than c in vacuum?http://www.sciencemag.org/content/347/6224/857http://arxiv.org/abs/1411.3987
Our work highlights that, even in free space, the invariance of the speed of light only applies to plane waves
we show a reduction in the group velocity of photons in both a Bessel beam and photons in a focused Gaussian beam. In both cases, the delay is several micrometers over a propagation distance of ~1 meter
....The speed of light in free space propagation is a fundamental quantity. It holds a pivotal role in the foundations of relativity and field theory, as well as in technological applications such as time-of-flight measurements, and radio and satellite communication. It has previously been experimentally established that single photons travel at the group velocity
We have now shown that transverse structuring of the photon results in a decrease in the group velocity along the axis of propagation. The effect can be derived from a simple geometric argument, which is also supported by a rigorous calculation of the harmonic average of the group velocity. Beyond light, the effect observed will have applications to any wave theory, including sound waves and, potentially, gravitational waves
Quote from: Rodal on 04/23/2015 08:56 pm[snip]Look at my answer above, on what I wrote after "EDIT".I would worry much more about particles in space being “swept up” into the warp bubble and focused into regions before and behind the ship. When your warp-driven spaceship decelerates, these particles will be released in outbursts. The forward-facing particles can be very energetic — enough to destroy anyone at the destination directly in front of you. So, if you are planning to go on a warp-drive beware that gamma ray and high energy particles may destroy any beings on the location you are trying to reach Wormholes are more benign (if you can traverse them Easy solution: Divide your travel way into hops with very short warp deactivation phases to get rid of unwanted particle collection.
[snip]Look at my answer above, on what I wrote after "EDIT".I would worry much more about particles in space being “swept up” into the warp bubble and focused into regions before and behind the ship. When your warp-driven spaceship decelerates, these particles will be released in outbursts. The forward-facing particles can be very energetic — enough to destroy anyone at the destination directly in front of you. So, if you are planning to go on a warp-drive beware that gamma ray and high energy particles may destroy any beings on the location you are trying to reach Wormholes are more benign (if you can traverse them
On another topic you can title lab safety: the energy Dr white is liable to have available to curve space is less than the energy in a big fire cracker. So lets say milligrams to a gram of TNT equivalents. In short any destructive effects from warping space at the level he is capable of in the near to medium term is comparable to an office prank. In other words; the minor curvature distortions he can provoke are not world threatening. They aren't even building threatening. They are on the level of slightly annoying the internal OSHA and fire safety additional duty guys.
...there should be no accumulation of massive particles or photons. also there should be no real space carry over of extra velocity. So even if there were an accumulation of matter or energy it would not be ammo for a relativistic rail gun effect. ... It seems to me that at stuff could not find the front end of the bubble let alone collect there; let alone fry stuff at the departure point or destination.
These results suggest that any ship using an Alcubierre warp drive carrying people would need shieldingto protect them from potential dangerously blueshifted particles during the journey
and any people at the destination would be gamma ray and high energy particle blasted into oblivion due to the extreme blueshifts for P+ region particles.
The assumptions I posted are not mine but those of Dr White when he answered critics that brought forward the particle acceleration and accumulation objections to his theory. So I am Not qualified to defend them. But Mr March certainly is. I just brought them up because it appeared the thread participants were unaware of them. I am sure he will address this and this should be very interesting for all involved.
Quote from: Stormbringer on 04/24/2015 01:54 amThe assumptions I posted are not mine but those of Dr White when he answered critics that brought forward the particle acceleration and accumulation objections to his theory. So I am Not qualified to defend them. But Mr March certainly is. I just brought them up because it appeared the thread participants were unaware of them. I am sure he will address this and this should be very interesting for all involved. Is there a paper where Dr. White made those statements, or are they in a video you can link to?I would like to see what he actually wrote or said on that matter.Thanks
Quote from: Rodal on 04/24/2015 01:56 amQuote from: Stormbringer on 04/24/2015 01:54 amThe assumptions I posted are not mine but those of Dr White when he answered critics that brought forward the particle acceleration and accumulation objections to his theory. So I am Not qualified to defend them. But Mr March certainly is. I just brought them up because it appeared the thread participants were unaware of them. I am sure he will address this and this should be very interesting for all involved. Is there a paper where Dr. White made those statements, or are they in a video you can link to?I would like to see what he actually wrote or said on that matter.ThanksYes. I saw it in a video of one of his presentations, -I think it was a couple of years ago. If I can find it I will certainly provide a link EDIT: Going through the videos now. I'm half way through the first video.
what videos? The one I posted or other ones?
Plenty of stuff to do in the Solar System before we have the need to venture forth.
the 4 newton version of the QVPT according to calculations using the copernicus software can send a probe to alpha proxima in 29 years of flight time; including acceleration and deacceleration time.