Dear Future: Nuclear fusion energy and the race to create a star on earth
There are 2 billion people in the world that don't have access to regular supplies of energy.
If we're gonna give them the same quality of living that we enjoy in North America and Europe, they're gonna need energy.
And we need answers for that.
If the future fusion was here today it would change the way our energy system works dramatically.
We've only had the Fire Department of New York come once, where we generated enough smoke to trip off the smoke detectors in the building, and have the fire department actually arrive and sort of shoo us out while they ventilated the laboratory.
I've been involved in fusion research since graduate school, 43 years ago.
Columbia University we work in Magnetic Fusion and we're part of the U.S. DOE Funded National Program in producing magnetically confined fusion energy.
Fusion is the ultimate energy source in the universe.
All the stars in the sky, the sun, all of those lighted objets are powered By fusion.
The process is really simple.
You just take two light isotopes, hydrogen usually.
Bring them together.
They react with a nuclear reaction.
And the produce 100 times more energy that it takes in order to produce the reaction in the first place.
The research on fusion that we're doing today is leading to a future where we could replace Coal fired, oil fired, gas fired power plants that we use today with fusion power plants.
Publicly funded fusion research and privately funded, which is using investor money, wanted to develop fusion.
We got to constantly look for ways to make this project move faster.
Right now we're at the Z facility.
We're in the high bay that contains the z accelerator.
Z is the largest [INAUDIBLE] accelerator on the planet.
It smells like oil.
This is not a clean room.
This is really how to make stuff happen.
If you were standing here during the shot, it would be your last few moments on Earth.
The government is funding most of this work because it's very expensive, it requires very big facilities.
The Z machine or the Z Accelerator, first began life in 1985 as the Particle Beam Fusion Accelerator II.
In about 1996 or '97, there was an opportunity to change the configuration into a Z [UNKNOWN] driver.
The Z machine the magnetically driven approach.
We have an energy stored section which consist of 36 large capacitor ranks.
And we're charging those capacity ranks up for about three minutes.
We charge up the banks to about 20 megajoules of stored energy.
Then we discharge all 36 of those marks banks simultaneously.
So we drive these targets from small spacial scales of order my thumbnail or smaller and we compress them with large currents.
And we also impose an externally applied magnetic field that we want to compress.
So we're exploring what's called the magnetized target fusion approach.
We store between 22 and 26 mega joules of energy which is anywhere between 26 and 52 sticks of dynamite.
We hear it and we feel it.
[SOUND] When the machine fires there's a lot of sound.
And the ground will roll.
I just want you to stand with your feet about two feet apart pointing at the center of the machine so that you can feel the roll most effectively.
We've had coat racks fall over on the second floor of a building that's probably about 100 yards away.
We've had picture frames fall.
There's only one Z machine in the world.
Everything else is That are pretty small compared to Z. This is what would happen on the machine just after the shot that we witnessed earlier today.
And some of that energy appears as high voltages that then flash over on the surface of the water as they find their way back to ground.
Fusion in the 50s and 60s and 70s Was oversold and it is much harder than people imagined it to be first.
You're trying to study plasmas which only exist for a few nanoseconds.
There are a lot of ways that that process can go wrong.
And you have to figure out, okay, in that last nanosecond, what's going on?
Is it the way we thought it was going to happen, or is something really not quite What we expected.
So it's discovery science at the limit of what's possible to do in the laboratory.
Our goal, and for much of the world that is studying fusion, is still physics feasibility, and we may be 30 years or 40 years away from a practical fusion energy technology That you obviously have to really belive in something to dedicate your whole life to it.
The scientific standards that are necessary to get public funding are quite high.
The projects that you try to do tend to be the lower risk, longer time scale Usually the private sector tries faster ways to do fusion.
Those companies try to find an approach to fusion that they think is quicker, smaller, most cost less.
Fusion energy has the potential to provide this to the world.
But there's no free launch and reasearch that means it's riskier
General Fusion's had a little north of $100 million to date in private capital.
Fusion has been pursued a lot by governments for many decades because of the promise of the technology.
What is new just being the advent of private companies.
The science and RND that's gone on in the public sector combined with the pace of innovation we're seeing elsewhere in the economy.
When you get new news about fusion.
It naturally attracts that attention.
So the machine behind me here is a prototype of the compression system that we wanna build.
So we form plasma and we compress it.
And this is a smaller scale than what a power plant would be, so there's no putting plasma into this.
This is the compression system.
And it's a central tank about a meter across that we can fill with molten metal.
And then around it are these 14 big pistons, these big drivers that will compress and collapse a cavity that's formed inside that liquid metal.
In the formation process we're already gonna be 4 or 5 million degrees C, and the compression is gonna heat it another 10, 20 times to 150 million degrees C.
The best way about how hot that is is to look up in the sky and look at the sun.
This is really the heart of the SPECTOR machine.
The plasma is formed from down below.
And it bubbles up into this spear here.
And all around, what you see, are diagnostics for measuring what's going on.
So there's large laser systems, and that you see lots of optics here.
And those lasers are used to measure things like the temperature of the plasma, at different points were the strength of the magnetic field, or the density of the plasma.
It can be very challenging to work on fusion.
It works great at the scale of the sun to create the conditions for fusion.
But we can't do that here on Earth.
We're not even close to being as big.
We have to throw a lot of energy at this fuel to get it to 100 million degrees.
And then we've gotta hold it there long enough.
To react enough to produce more energy out than we put in.
We've had decade after decades of smaller companies trying to find a faster cheaper way to fusion, none have been successful so far.
You presumably have uncovered some new approach, new wrinkle that makes you think that what you're gonna do will succeed.
Whereas other people who have tried this approach have failed.
The hardest thing to answer in this game is how soon.
What we have a good line on is the next four or five years.
We really want to take what we're doing here at General Fusion at the scape of big subsystems and prototypes, like this one, and turn that into a large-scale, integrated machine, produce conditions Is like what we need for fusion.
So the idea that people have been up against certain problems forever and ever and ever, I don't think is actually true.
We've as a field, and a lot of this goes to really good hard work in the national labs and the public domain, have overcome problems, found solutions, learned more about the science, and made progress, step by step by step.
Scientific breakeven is getting as much energy out of the system in terms of fusion neutrons as the energy you put into the hot plasma.
That's the first hurdle of many.
There is on facility in the country that has achieved scientific breakeven.
It's the Nation Ignition Facility, the laser facility in California.
It's a tremendous accomplishment and I would say on Z we hope to be achieving scientific break even sometime in the next 5 years.
We'll need energy from somewhere.
And If we don't get that energy then the quality of life will suffer.
We want to have an alternative
May not be the best idea in the world to continuing to burn fossil fuels at the rate we're burning.
One has to do something.
One can't just give up.
We as a community have created a lot of the physics and understanding that we need in order to build a power plant.
The blank spaces in the map that need to filled in are a lot, lot smaller than they used to be.
If we look at the strides that have been made in clean energy, such as solar and wind
Than biofuels in the last two decades has been stunning.
The United States isn't investing enough in energy technologies writ large, not just fusion.
The funding for all forms of energy should go up, especially clean forms.
The research on fusion we're doing today is leading to a future where we have fusion-powered electric generating plants to meet our needs in a high-tech industrialized society.
Dear Future: The two-legged robot walking into the future
Dear Future: Meet the people building their own internet in Detroit
Dear Future: Batteries will be a thing of the past
Dear Future: Where we might find life on Mars
Dear Future: Watch the trailer for our new documentary series