Fusion Engine Could Cut Time To Get To Mars To 30 Days

[DieHardBrownsFan]

NASA-backed fusion engine could cut Mars trip down to 30 days

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FDR for the stars

 

By Iain Thomson in San Francisco • Get more from this author

 

Posted in Science, 10th April 2013 00:40 GMT

 

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NASA, and plenty of private individuals, want to put mankind on Mars. Now a team at the University of Washington being funded by the space agency is about to start building a fusion engine that could get humans there in just 30 days and make other forms of space travel obsolete.

 

Rocket fuel is just so last century

 

"Using existing rocket fuels, it's nearly impossible for humans to explore much beyond Earth," said lead researcher John Slough, a UW research associate professor of aeronautics and astronautics in astatement. "We are hoping to give us a much more powerful source of energy in space that could eventually lead to making interplanetary travel commonplace."

 

The proposed Fusion Driven Rocket (FDR) is a 150-ton system that uses magnetism to compress lithium or aluminum metal bands around a deuterium-tritium fuel pellet to initiate fusion. The resultant microsecond reaction forces the propellant mass out at 30 kilometers per second, and would be able to pulse every minute or so and not cause g-force damage to the spacecraft's occupants.

 

The spent fuel pellet is ejected behind the motor to provide propulsion, and because the whole process is magnetically controlled there's relatively little wear and tear on the engines. A pellet the size of a grain of sand would provide the same propellant as a gallon of conventional rocket fuel.

 

All this requires electrical power to control and contain the reaction, but Anthony Pancokti, an advanced propulsion engineer with the team, told The Register that the advantages of magnetic inertial confinement fusion (over that requiring massive lasers, for example) mean that the spacecraft could power itself on solar energy alone.

 

"It's very scalable; we can achieve fusion at a much smaller scale," he said. "We could run the designed engine off 200KW of solar panels, which is about the same power as generated by the panels around the International Space Station"

 

Using the FDR system, flight times to the Red Planet could take between 30 and 90 days, compared to over eight months that it took to send the Curiosity rover to Mars. The 30-day trip would require three days of engine operation to get the spacecraft up to speed and another three to slow it down into orbit around Mars.

 

Such a motor would also be considerably cheaper to launch than a chemical rocket system, since there is much less fuel to hoist out of the gravity well before it starts a trip. The proposed design for a 150-ton spacecraft would allow around a third of that mass to be used for cargo – human or otherwise – and the reduced flight time would reduce the exposure of astronauts to the effects of solar radiation.

 

Many space missions use aerobraking – using the friction of a planet's atmosphere to slow down – as a way of saving the propellant. This drive, however, is so efficient that aerobraking makes little sense, since the weight of the shielding needed for the maneuver is greater than the propellant FDR needs to slow down.

 

The FDR fusion drive prototype in a Washington lab

 

The team has tested all the parts of the FDR in the lab, and is now going to start building a fully working engine that brings these elements together, thanks to funding from NASA's Innovative Advanced Concepts Program, which aims to fund long-term space technology.

 

The FDR is one of only ten projects to get Stage Two funding from the program. This $600,000 award will provide the proof-of-concept FDR system over the next 18 months, and a working spacecraft would be ready as soon as 2020, Pancokti predicted – but if NASA wanted to throw money at the project, this timescale could be cut.

 

Given the tight financial strictures of the US government this is unlikely, but the FDR engine has the potential to make chemical or ion drives for spacecraft as obsolete as the steam engine for earth-bound transportation. ®

 

[MLD Woody]

I thought we were still working on fusion reactors for nuclear plants?

[blowe]

I thought we were still working on fusion reactors for nuclear plants?

 

I've heard from a few people in the science community that a fusion reactor not only is possible, but it's probably already been invented. The people I spoke with (no one famous, just a couple older friends of mine) believe that it exists and the government is waiting for the right time to unveil it. Seems like a bit of a conspiracy theory, but then again it makes sense that the government might want an ace up their sleeve if the shit ever hits the fan. Fusion reactors could surely change the world so I don't think this is as far fetched as it sounds. I wish I could believe our government has our best interests in mind, but I don't think they do.

[VaporTrail]

I was at a conference in February where the guys at the National Ignition Facility were giving talks. The fucking conference organizers put them in a room with a capacity of 30 people. There were ~15,000 scientists at the conference.

 

As for keeping something like that a secret. That'd be a hell of a conspiracy as some of the scientists working on it are probably spies, and the secret to fusion is too good to pass up.

[calfoxwc]

That's amazing. If the engine pulses one time a minute....how do they steer the craft?

 

It's surely a stupid question, ggg, but this is new stuff to me...

 

very, very cool.

 

Hey, that would explain how alien spacecraft could get to earth, and make

 

the alleged incredible maneuvers that ...witnesses have described...

 

maybe...

[Westside Steve]

Well if the EPA will allow people out west to start mining dilithium crystals we'll be fine.

WSS

[FairHooker11]

EPA already know about the "Warp travel" effects in outer space .... they will leave too many trails?

 

[The Cysko Kid]

I'm very excited for any technology that will get us off earth and colonizing other planets. We'll need to do that to survive as a species. Otherwise we'll wipe ourselves out or be wiped out by disease or celestial impact. Think how many problems could be solved by slowly shifting the earths population to other colonies.

 

Also, though I realize its not the propulsion system per se, I can't help but notice how often magnets were mentioned in this article. And y'all laughed at me.

[The Cysko Kid]

I'm just kidding of course, I was thinking of magnets another way altogether.

[FairHooker11]

whatever happened to that British built space ship that can reduce travel time toAustrailia?

 

the one I thought that looked like something Richard Branson would have?

[The Cysko Kid]

Who knows. I'm sure all kinds of neat things exist that are not seeing the light of day.

[nunboy]

Who knows. I'm sure all kinds of neat things exist that are not seeing the light of day.

Ben Rich the head of Lockheed Martin's skunkworks has said we pretty much have technology that might as well be alien it is so advanced.

 

“We have things in the Nevada desert that are alien to your way of thinking far beyond anything you see on Star Trek.”