WEBVTT 00:00:00.000 --> 00:00:03.620 OK, so you know how for like 70 years people 00:00:03.620 --> 00:00:05.919 have been talking about this dream of like clean 00:00:05.919 --> 00:00:09.000 and basically endless energy from nuclear fusion? 00:00:09.039 --> 00:00:11.820 Yeah, like it's always felt like this just amazing 00:00:11.820 --> 00:00:14.759 future that's almost here, but not quite. And 00:00:14.759 --> 00:00:16.640 right. What if I told you that with the help 00:00:16.640 --> 00:00:19.940 of some really, really smart AI, that future 00:00:19.940 --> 00:00:23.410 is like closer than it's ever been? Absolutely. 00:00:23.710 --> 00:00:25.789 And that's exactly what we're going to be diving 00:00:25.789 --> 00:00:27.870 into today on this deep dive. We're going to 00:00:27.870 --> 00:00:30.030 be looking at nuclear fusion and some really 00:00:30.030 --> 00:00:32.500 significant progress that's been made recently. 00:00:32.679 --> 00:00:36.259 We saw the US Department of Energy hit this landmark 00:00:36.259 --> 00:00:39.719 achievement of net energy gain, and now there's 00:00:39.719 --> 00:00:42.259 this truly fascinating development coming right 00:00:42.259 --> 00:00:43.939 out of Germany. And that's what we're going to 00:00:43.939 --> 00:00:45.500 be focusing on today. We're going to be zooming 00:00:45.500 --> 00:00:48.219 right in on the German facility, the Wendelstein 00:00:48.219 --> 00:00:51.600 7X Stellarator. Yes. And we're going to explore 00:00:51.600 --> 00:00:54.719 the truly mind -bending role that artificial 00:00:54.719 --> 00:00:57.200 intelligence is playing in all of this. In pushing 00:00:57.200 --> 00:01:00.649 fusion from a dream, into an actual reality. 00:01:01.090 --> 00:01:03.609 Yeah. And our goal today for you listening is 00:01:03.609 --> 00:01:06.290 to really understand these major milestones, 00:01:07.010 --> 00:01:09.250 get a good grasp on the different ways scientists 00:01:09.250 --> 00:01:11.549 are actually approaching fusion, and just see 00:01:11.549 --> 00:01:14.870 how AI is like this secret weapon that's speeding 00:01:14.870 --> 00:01:17.629 up the process to a clean energy future. Exactly. 00:01:17.730 --> 00:01:21.670 For everybody. Yeah. OK, so let's unpack this 00:01:21.670 --> 00:01:24.670 a little bit. What exactly is this like holy 00:01:24.670 --> 00:01:27.150 grail of fusion that we keep hearing about? Well, 00:01:27.239 --> 00:01:30.659 At its most basic level, nuclear fusion is the 00:01:30.659 --> 00:01:33.640 process of taking atomic nuclei and joining them 00:01:33.640 --> 00:01:35.739 together. And we're usually talking about isotopes 00:01:35.739 --> 00:01:38.540 of hydrogen here. OK. So think of those as like 00:01:38.540 --> 00:01:40.400 slightly different versions of a hydrogen atom. 00:01:40.540 --> 00:01:42.480 Got it. And you're smashing them together to 00:01:42.480 --> 00:01:44.579 create a heavier nucleus like helium, for example. 00:01:44.920 --> 00:01:47.219 And when this happens, a tremendous amount of 00:01:47.219 --> 00:01:49.140 energy is released. Yeah. And this is the same 00:01:49.140 --> 00:01:50.959 process that's happening right now in our sun. 00:01:51.019 --> 00:01:54.079 Right. What makes this so appealing is that unlike 00:01:54.079 --> 00:01:56.060 nuclear fission, which involves splitting atoms 00:01:56.060 --> 00:01:58.280 and creates that that long -lived hazardous radioactive 00:01:58.280 --> 00:02:01.920 waste, the main by -product of fusion is helium, 00:02:02.180 --> 00:02:04.840 which is inert and totally harmless. So you can 00:02:04.840 --> 00:02:07.200 really start to see the potential there for a 00:02:07.200 --> 00:02:09.479 safe and clean energy source. Absolutely, and 00:02:09.479 --> 00:02:12.500 I think that contrast with fission is so important 00:02:12.500 --> 00:02:15.240 to highlight, because it really does solve that 00:02:15.240 --> 00:02:18.780 issue of what do we do with this dangerous waste 00:02:18.780 --> 00:02:21.379 and how do we store it long -term? Exactly. Now, 00:02:21.379 --> 00:02:24.800 you mentioned EIDR in France, and that's like 00:02:24.800 --> 00:02:27.680 another major player in the Fusion world. Yeah, 00:02:27.840 --> 00:02:30.219 it's this massive collaborative project and they're 00:02:30.219 --> 00:02:34.280 really focused on proving that this tokamak concept 00:02:34.280 --> 00:02:37.229 can work. So a tokamak, you can think of it like 00:02:37.229 --> 00:02:40.409 this giant magnetic bottle. It's shaped like 00:02:40.409 --> 00:02:43.889 a donut or technically a torus. And you use these 00:02:43.889 --> 00:02:46.909 powerful magnetic fields to contain this incredibly 00:02:46.909 --> 00:02:49.590 hot plasma. And plasma is just that state where 00:02:49.590 --> 00:02:51.669 the electrons are stripped away from the atoms. 00:02:51.710 --> 00:02:54.469 You contain that within this donut -shaped chamber. 00:02:54.889 --> 00:02:57.210 And the scale of ITER is really, really impressive. 00:02:57.490 --> 00:03:01.229 They have 24 superconducting magnets. So these 00:03:01.229 --> 00:03:02.969 are special magnets that when you cool them down 00:03:02.969 --> 00:03:05.259 to extremely low temperatures, They can conduct 00:03:05.259 --> 00:03:07.919 electricity with virtually no resistance. So 00:03:07.919 --> 00:03:10.340 you can get these super strong magnetic fields. 00:03:10.780 --> 00:03:14.680 And some of these magnets weigh up to 400 tons. 00:03:14.819 --> 00:03:17.680 Wow. They're designed to create those incredibly 00:03:17.680 --> 00:03:19.819 strong magnetic fields that you need for this 00:03:19.819 --> 00:03:22.000 whole thing to work. 400 tons, that really gives 00:03:22.000 --> 00:03:24.259 you like a sense of the scale. Yeah. And the 00:03:24.259 --> 00:03:26.719 power involved here. Sure. But I remember reading 00:03:26.719 --> 00:03:29.539 that there's this big challenge with the tokamak 00:03:29.539 --> 00:03:31.860 approach. Right. It's something about not being 00:03:31.860 --> 00:03:33.949 able to run continuously, is that right? Yes, 00:03:33.949 --> 00:03:36.689 that's a really critical limitation, actually. 00:03:37.229 --> 00:03:40.389 So current tokamak designs, including ITER, they're 00:03:40.389 --> 00:03:42.650 fundamentally limited to what we call pulsed 00:03:42.650 --> 00:03:45.210 operation. So the fusion reaction tends to extinguish 00:03:45.210 --> 00:03:47.590 itself after just a few hours. And then you have 00:03:47.590 --> 00:03:50.569 to restart it, which is costly and energy intensive. 00:03:50.629 --> 00:03:53.050 You can think of it like an oven that just keeps 00:03:53.050 --> 00:03:55.430 turning itself off every few hours, which isn't 00:03:55.430 --> 00:03:57.909 very practical if you want a continuous supply 00:03:57.909 --> 00:04:01.050 of power. So while ITER is really important for 00:04:01.050 --> 00:04:03.389 pushing our fundamental understanding fusion 00:04:03.389 --> 00:04:07.009 forward and demonstrating that the core technology 00:04:07.009 --> 00:04:10.949 works this on again off again nature of it presents 00:04:10.949 --> 00:04:13.810 a real challenge if we want to turn it into a 00:04:13.810 --> 00:04:16.069 Practical always on power plant for everybody 00:04:16.069 --> 00:04:18.449 to actually use exactly right that on and off 00:04:18.449 --> 00:04:21.129 issue with tokamaks Really does sound like a 00:04:21.129 --> 00:04:23.209 major hurdle. Yeah, if you want to use it for 00:04:23.209 --> 00:04:25.410 power generation Yeah, and it really makes you 00:04:25.410 --> 00:04:27.129 wonder if there's a different way to keep that 00:04:27.129 --> 00:04:29.990 fusion fire burning continuously, right? So that 00:04:29.990 --> 00:04:33.310 brings us to Germany and the Vandals 97X. This 00:04:33.310 --> 00:04:35.230 is a completely different type of machine. Yeah, 00:04:35.230 --> 00:04:37.649 it is. They call it an optimized stellarator. 00:04:37.769 --> 00:04:40.639 Right. So what is the idea behind that? So the 00:04:40.639 --> 00:04:42.779 Max Planck Institute in Germany has been taking 00:04:42.779 --> 00:04:45.160 a different approach with the Wendelstein 7x. 00:04:45.360 --> 00:04:47.779 Now the stellarator concept itself isn't new. 00:04:47.939 --> 00:04:50.720 In fact, it actually predates the Tokamak. Interesting. 00:04:50.800 --> 00:04:53.379 But for a long time, it was considered less promising. 00:04:54.399 --> 00:04:57.019 However, advances in supercomputer simulations 00:04:57.019 --> 00:04:59.639 have really changed things. These simulations 00:04:59.639 --> 00:05:02.800 have allowed scientists to design much more sophisticated 00:05:02.800 --> 00:05:06.139 and effective stellarator geometries. So instead 00:05:06.139 --> 00:05:09.199 of that kind of simple doughnut shape of the 00:05:09.199 --> 00:05:12.079 tokamak. What are we looking at with this stellarator? 00:05:12.379 --> 00:05:14.339 Imagine you take that doughnut shape of a tokamak 00:05:14.339 --> 00:05:17.019 and then you twist it multiple times, like you're 00:05:17.019 --> 00:05:20.279 wringing out a wet towel. OK. That complex shape 00:05:20.279 --> 00:05:23.079 that you get, that's the heart of the stellarator 00:05:23.079 --> 00:05:25.660 design. Got it. And it's not a perfect torus. 00:05:25.740 --> 00:05:28.680 It's more like this intricate multiply twisted 00:05:28.680 --> 00:05:32.079 band that forms the plasma confinement area in 00:05:32.079 --> 00:05:35.959 the Wendelstein 7X. And this unique and carefully 00:05:35.959 --> 00:05:38.379 calculated shape, which they achieved through 00:05:38.379 --> 00:05:41.459 these elaborate supercomputer simulations, is 00:05:41.459 --> 00:05:44.060 absolutely essential to how it performs. And 00:05:44.060 --> 00:05:46.620 what does that specific shape achieve? Right. 00:05:46.720 --> 00:05:48.939 Why is it so important? What's really fascinating 00:05:48.939 --> 00:05:51.240 here is that this precisely calculated shape 00:05:51.240 --> 00:05:53.620 ensures that every single particle within that 00:05:53.620 --> 00:05:56.939 superheated plasma experiences the exact same 00:05:56.939 --> 00:05:59.220 magnetic field as it travels along that really 00:05:59.220 --> 00:06:02.720 complex twisted path. And this uniformity in 00:06:02.720 --> 00:06:04.879 the magnetic field is essential for the stability 00:06:04.879 --> 00:06:07.079 of the plasma and for keeping it contained for 00:06:07.079 --> 00:06:09.720 much longer periods, without the disruptions 00:06:09.720 --> 00:06:12.040 and instabilities that you often see in tokamaks. 00:06:12.250 --> 00:06:15.069 Interesting. Each of the incredibly powerful 00:06:15.069 --> 00:06:18.310 magnets that create this complex magnetic field 00:06:18.310 --> 00:06:23.209 weighs six tons. Wow. And their precise arrangement 00:06:23.209 --> 00:06:25.750 down to the millimeter is absolutely crucial 00:06:25.750 --> 00:06:28.509 for keeping that incredibly hot plasma on its 00:06:28.509 --> 00:06:30.970 path and away from the reactor walls. Because 00:06:30.970 --> 00:06:33.410 if that hundred million degree plasma touches 00:06:33.410 --> 00:06:36.089 the walls even for a moment, it'll cool down 00:06:36.089 --> 00:06:38.949 instantly and the fusion reaction stops. Six 00:06:38.949 --> 00:06:42.029 tons per magnet. And they're arranged with that 00:06:42.029 --> 00:06:44.449 level of precision. Yeah. And I can only imagine 00:06:44.449 --> 00:06:46.970 the kind of heat those inner walls have to withstand. 00:06:47.009 --> 00:06:49.470 Right. We're talking about temperatures far hotter 00:06:49.470 --> 00:06:52.430 than what a spacecraft during re -entry. Exactly. 00:06:52.569 --> 00:06:54.250 So if you're listening just think about the most 00:06:54.250 --> 00:06:56.990 intense heat you can imagine and then multiply 00:06:56.990 --> 00:06:59.930 that many many times. Exactly. The inner walls 00:06:59.930 --> 00:07:02.209 have to be built to withstand temperatures many 00:07:02.209 --> 00:07:05.129 many times greater than that. And inside the 00:07:05.129 --> 00:07:09.269 plasma reaches an astounding 100 million degrees 00:07:09.269 --> 00:07:12.899 Celsius. It's at these extreme temperatures that 00:07:12.899 --> 00:07:15.620 the hydrogen nuclei can overcome their natural 00:07:15.620 --> 00:07:19.779 repulsion and fuse together to form helium, releasing 00:07:19.779 --> 00:07:22.240 that huge burst of energy. And that's the same 00:07:22.240 --> 00:07:25.089 energy source as the Sun's core. And to manage 00:07:25.089 --> 00:07:27.449 all this heat, they've installed a very sophisticated 00:07:27.449 --> 00:07:30.949 cooling system, which is basically seven kilometers 00:07:30.949 --> 00:07:33.810 of water pipes snaking through the reactor. Seven 00:07:33.810 --> 00:07:36.389 kilometers. That's an amazing feat of engineering. 00:07:36.449 --> 00:07:39.389 Yeah. Now, with anything involving this much 00:07:39.389 --> 00:07:41.730 power, safety is always a big concern. Right. 00:07:42.029 --> 00:07:44.230 So what kind of safety measures are in place 00:07:44.230 --> 00:07:46.730 with this stellarator design? So that's a really 00:07:46.730 --> 00:07:49.709 important question. And unlike traditional nuclear 00:07:49.709 --> 00:07:53.089 fission reactors, A runaway chain reaction or 00:07:53.089 --> 00:07:55.610 a meltdown is just physically impossible in a 00:07:55.610 --> 00:07:58.430 fusion device like this. The amount of fuel present 00:07:58.430 --> 00:08:01.410 in the plasma at any given time is tiny. We're 00:08:01.410 --> 00:08:03.470 talking about a single milligram of hydrogen. 00:08:03.769 --> 00:08:06.310 And if there's even a small disruption in the 00:08:06.310 --> 00:08:08.829 magnetic field or in the plasma itself, it'll 00:08:08.829 --> 00:08:11.170 immediately cause the fusion process to stop 00:08:11.170 --> 00:08:14.149 entirely. It's inherently self -limiting and 00:08:14.149 --> 00:08:16.269 very safe in principle. That's good to hear. 00:08:16.990 --> 00:08:19.949 So what was the big milestone that the Wendelstein's 00:08:19.949 --> 00:08:23.220 7X? achieved recently that has everybody so excited. 00:08:23.759 --> 00:08:26.259 The big achievement was that they managed to 00:08:26.259 --> 00:08:28.639 generate and contain this high -temperature plasma 00:08:28.639 --> 00:08:32.360 with an energy expenditure of 1 .3 gigajoules. 00:08:32.590 --> 00:08:35.590 and they sustained it stably for over eight minutes. 00:08:36.149 --> 00:08:39.110 Wow. Now, this particular experiment wasn't focused 00:08:39.110 --> 00:08:41.629 on net energy gain like the US experiment was. 00:08:41.649 --> 00:08:43.669 OK. But it showed something really important. 00:08:43.809 --> 00:08:46.149 It showed that stellarators can provide this 00:08:46.149 --> 00:08:48.850 long duration stable plasma confinement. Right. 00:08:49.110 --> 00:08:51.330 And that's a big step forward in proving that 00:08:51.330 --> 00:08:54.370 stellarators could be a viable pathway towards 00:08:54.370 --> 00:08:56.970 continuous fusion power. OK. So eight minutes 00:08:56.970 --> 00:08:59.470 of sustained plasma. Yeah. At those temperatures, 00:08:59.490 --> 00:09:01.629 that's incredible. It's pretty amazing. It really 00:09:01.629 --> 00:09:03.730 does sound. like the stellarator approach, which 00:09:03.730 --> 00:09:07.110 was once considered less promising, is now showing 00:09:07.110 --> 00:09:09.309 its true potential. And you mentioned artificial 00:09:09.309 --> 00:09:11.990 intelligence playing a big part in this. How 00:09:11.990 --> 00:09:15.370 exactly is AI helping with these breakthroughs? 00:09:15.629 --> 00:09:17.269 This is where things get really interesting. 00:09:17.669 --> 00:09:21.149 So AI is proving to be incredibly useful in speeding 00:09:21.149 --> 00:09:23.549 up scientific discovery in all sorts of fields, 00:09:23.809 --> 00:09:26.470 and fusion research is no exception. One of the 00:09:26.470 --> 00:09:29.649 big things AI can do is run vast numbers of complex 00:09:29.649 --> 00:09:32.789 simulations extremely quickly. And for something 00:09:32.789 --> 00:09:36.669 as mind -bogglingly complex as the behavior of 00:09:36.669 --> 00:09:40.590 plasma, within these magnetic fields, AI algorithms 00:09:40.590 --> 00:09:43.350 can explore millions of potential configurations 00:09:43.350 --> 00:09:46.710 and fine -tune tons of parameters in a fraction 00:09:46.710 --> 00:09:48.570 of the time it would take humans to even think 00:09:48.570 --> 00:09:51.190 of them. So it's almost like having this super 00:09:51.190 --> 00:09:54.669 smart, super fast lab assistant that's testing 00:09:54.669 --> 00:09:57.230 out tons of ideas at the same time. Exactly, 00:09:57.309 --> 00:09:59.629 and it's more than just simulations. Google's 00:09:59.629 --> 00:10:02.289 DeepMind has created AI systems that can actually 00:10:02.289 --> 00:10:05.009 control the plasma infusion experiments themselves. 00:10:05.210 --> 00:10:07.629 Wow. Think about all the tiny adjustments that 00:10:07.629 --> 00:10:09.529 need to be made constantly to these magnetic 00:10:09.529 --> 00:10:12.750 fields to keep that plasma stable. It's a crazy 00:10:12.750 --> 00:10:16.110 complex system. Yeah. DeepMind's AI has shown 00:10:16.110 --> 00:10:19.779 it can learn in real time. how to control those 00:10:19.779 --> 00:10:23.220 magnets to create and maintain the plasma shapes 00:10:23.220 --> 00:10:27.100 they want both in simulations and in real tokamak 00:10:27.100 --> 00:10:29.059 experiments. So the AI is not just looking at 00:10:29.059 --> 00:10:31.580 the data after the fact, it's actively controlling 00:10:31.580 --> 00:10:34.639 the experiment itself. Exactly. Yeah. And fusion 00:10:34.639 --> 00:10:37.240 is a particularly big challenge for AI. Okay. 00:10:37.480 --> 00:10:39.980 Because it's this continuous and what researchers 00:10:39.980 --> 00:10:43.960 call under -observed system. Got it. Unlike something 00:10:43.960 --> 00:10:46.200 like a game of chess, where you have these clearly 00:10:46.200 --> 00:10:49.639 defined turns, the plasma is always evolving. 00:10:49.700 --> 00:10:51.820 And we can't measure all the important aspects 00:10:51.820 --> 00:10:54.879 of it all the time with perfect accuracy. But 00:10:54.879 --> 00:10:56.860 even with all this complexity and the limited 00:10:56.860 --> 00:11:00.440 data, AI is making huge strides in understanding 00:11:00.440 --> 00:11:04.139 and controlling this crazy hot ionized gas. And 00:11:04.139 --> 00:11:06.259 it's definitely speeding up the process of developing 00:11:06.259 --> 00:11:08.480 fusion reactors that we can actually use. It 00:11:08.480 --> 00:11:10.220 really feels like we're on the verge of something 00:11:10.220 --> 00:11:13.100 big in terms of how we get our energy. And it's 00:11:13.100 --> 00:11:14.860 not just one country doing all of this, is it? 00:11:15.000 --> 00:11:17.320 No, it's a global effort. You mentioned China's 00:11:17.320 --> 00:11:19.279 efforts earlier, right? China is investing a 00:11:19.279 --> 00:11:20.779 lot in this field, and they've achieved some 00:11:20.779 --> 00:11:22.840 really impressive things with their own reactors. 00:11:23.139 --> 00:11:25.539 They're aiming to achieve fusion reactions that 00:11:25.539 --> 00:11:28.539 last for weeks, not just minutes. And that shows 00:11:28.539 --> 00:11:31.460 you how seriously the world is taking this. Everyone 00:11:31.460 --> 00:11:34.259 recognizes the potential of fusion to solve our 00:11:34.259 --> 00:11:36.399 energy problems in the long run, and it creates 00:11:36.399 --> 00:11:38.639 a healthy competition which could actually benefit 00:11:38.639 --> 00:11:41.419 all of us in the end by pushing things forward 00:11:41.419 --> 00:11:44.129 faster. So let's sum up what we've talked about 00:11:44.129 --> 00:11:47.090 today. We've seen some really big steps taken 00:11:47.090 --> 00:11:50.490 towards achieving nuclear fusion. The US reached 00:11:50.490 --> 00:11:54.169 net energy gain. Right. And in Germany, the Wendelstein 00:11:54.169 --> 00:11:57.009 7X showed that they could create stable plasma 00:11:57.009 --> 00:11:59.549 for a long time. We also talked about the differences 00:11:59.549 --> 00:12:02.009 in design between the tokamak with its doughnut 00:12:02.009 --> 00:12:04.629 shape and the stellarator with its more complex 00:12:04.629 --> 00:12:07.789 twisted geometry. And we've seen how AI is not 00:12:07.789 --> 00:12:10.850 just some futuristic idea, but it's an essential 00:12:10.850 --> 00:12:12.870 tool that's helping us overcome some of the biggest 00:12:12.870 --> 00:12:15.740 challenges in this field. Those recent milestones 00:12:15.740 --> 00:12:18.460 are really significant. They show that we're 00:12:18.460 --> 00:12:20.759 finally making some real progress in dealing 00:12:20.759 --> 00:12:23.639 with the scientific and engineering hurdles of 00:12:23.639 --> 00:12:26.320 getting sustained and possibly even continuous 00:12:26.320 --> 00:12:30.100 nuclear fusion. The Tokamak and the Stellarator 00:12:30.100 --> 00:12:32.740 both have their pros and cons, and AI is becoming 00:12:32.740 --> 00:12:34.480 more and more important in helping us develop 00:12:34.480 --> 00:12:38.059 both of these designs. The dream of clean and 00:12:38.059 --> 00:12:40.759 plentiful energy from fusion is starting to look 00:12:40.759 --> 00:12:43.649 more and more achievable. Absolutely. This is 00:12:43.649 --> 00:12:45.850 such an exciting time to be following this field. 00:12:45.850 --> 00:12:48.710 It really makes you think, considering how fast 00:12:48.710 --> 00:12:52.929 AI is advancing and this global race to harness 00:12:52.929 --> 00:12:56.309 the power of fusion, what could the world's energy 00:12:56.309 --> 00:12:58.409 situation actually look like in the next couple 00:12:58.409 --> 00:13:01.230 of decades? What new breakthroughs might we see 00:13:01.230 --> 00:13:04.110 that could completely change the game and affect 00:13:04.110 --> 00:13:06.549 the way we power our lives? Definitely something 00:13:06.549 --> 00:13:09.149 to think about. Some pretty profound stuff. Absolutely. 00:13:11.360 --> 00:13:12.779 Well, that's all the time we have for today. 00:13:13.139 --> 00:13:15.259 Thanks for tuning into this deep dive on nuclear 00:13:15.259 --> 00:13:18.000 fusion and AI, and we'll see you next time. Sounds 00:13:18.000 --> 00:13:18.340 good.