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Dennis Whyte

πŸ‘€ Speaker
1833 total appearances

Appearances Over Time

Podcast Appearances

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

And it's actually because if you want to make an energy source out of this…

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

So this had a gain of around 1.5, that namely the fusion energy was approximately 1.5 times the laser input energy.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

Okay, this is a fairly significant threshold.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

However, from the science of what I just told you, is that there's two fundamental efficiencies which come into it, which really come from physics, really.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

One of them is hydrodynamic efficiency.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

What I mean by this is that it's a rocket.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

So this just has a fundamental...

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

efficiency built into it, which comes out to orders of like 10%.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

So this means is that your ability to do work on the system is just limited by that, okay?

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

And then the other one is the efficiency of laser systems themselves, which if their wall plug efficiency is 10%, you've done spectacularly well.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

In fact, the wall plug efficiency of the ones using that experiment are like more like 1%, right?

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

So when you go through all of this, the approximate, you know, place that you're ordering this is for a fusion power plant would be a gain of 100, not 1.5.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

So you still, you know, and hopefully we see experiments that keep climbing up towards higher and higher gain.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

But then the whole fusion power plant is a totally different thing.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

So it's not one BB and one laser pulse per day.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

It's like five or ten times per second, right?

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

Like that, right?

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

So you're doing it there.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

And then comes the other aspect.

Lex Fridman Podcast
#353 – Dennis Whyte: Nuclear Fusion and the Future of Energy

So it's making the targets, delivering them, being able to repeatedly get them to burn.