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Fusion Energy Is Closer Than Expected · The Quark Side - Quantum Physics Podcast

• 0:01
  Speaker 1: Welcome to the quart Side. Quantum Physics Podcast, an exploration
• 0:05
  Speaker 1: of the fundamental structure of reality, where quantum laws govern matter, energy,
• 0:11
  Speaker 1: and information. Here, uncertainty is a feature, not a flaw,
• 0:16
  Speaker 1: and understanding begins at the smallest scales.
• 0:27
  Speaker 2: You know that old joke that goes around the physics departments,
• 0:31
  Speaker 2: the one where they say nuclear fusion is the energy
• 0:33
  Speaker 2: of the future, and well it always will be.
• 0:36
  Speaker 3: Oh yeah, it's basically been the ultimate technological punchline for
• 0:39
  Speaker 3: decades now.
• 0:40
  Speaker 2: Right, the promise was always, you know, thirty years away.
• 0:43
  Speaker 2: It really felt like humanity was stuck on this grueling,
• 0:46
  Speaker 2: exhausting run on a treadmill. We're sweating, we're putting in
• 0:49
  Speaker 2: the work, but we're just we're never actually stepping forward.
• 0:52
  Speaker 3: But something fundamental has shifted there. We are looking at
• 0:55
  Speaker 3: a reality that was honestly once a joke. The era
• 0:58
  Speaker 3: of limitless energy isn't thirty years away anymore. I mean
• 1:02
  Speaker 3: it is happening right now, in twenty twenty five and
• 1:04
  Speaker 3: twenty twenty six exactly.
• 1:06
  Speaker 2: So we really need to look at how human engineering
• 1:09
  Speaker 2: finally caught up to the stars, right, Like, why we
• 1:12
  Speaker 2: have suddenly stepped off that treadmill and just tread sprinting forward.
• 1:15
  Speaker 3: Well, the transition from these theoretical physics experiments into actual
• 1:21
  Speaker 3: commercial power plant development is just moving at a blistering pace.
• 1:25
  Speaker 3: Right now, the mat has finally flipped.
• 1:27
  Speaker 2: Okay, but before we get into the wild milestones that
• 1:30
  Speaker 2: just happened, we should probably set a quick baseline for
• 1:32
  Speaker 2: you listening, just to make sure we are all looking
• 1:34
  Speaker 2: at this through the right lens.
• 1:36
  Speaker 3: Yeah, that's a good idea, because you know, you hear
• 1:39
  Speaker 3: the word nuclear and a lot of people immediately picture
• 1:42
  Speaker 3: massive concrete cooling towers.
• 1:44
  Speaker 2: Right, glowing green rods, centuries of radioactive waste. But that's fission.
• 1:50
  Speaker 2: Fusion is a completely different beast.
• 1:54
  Speaker 3: It really is. Fission is the process of taking heavy,
• 1:57
  Speaker 3: unstable atoms like uranium or plutonium and forcing them to
• 2:00
  Speaker 3: split apart. It releases a tremendous amount of energy, but
• 2:04
  Speaker 3: the leftovers are highly radioactive, long lived waste.
• 2:08
  Speaker 2: And it has that chain reaction element right exactly.
• 2:11
  Speaker 3: Because fission relies on a chain reaction, there's this inherent
• 2:14
  Speaker 3: physical risk of it running out of control and causing
• 2:16
  Speaker 3: a meltdown. But fusion goes in the exact opposite direction.
• 2:20
  Speaker 2: So instead of splitting heavy atoms, you go the other way.
• 2:23
  Speaker 3: Right, You take the lightest atoms in the universe and
• 2:25
  Speaker 3: smash them together. We use different isotopes or variations of hydrogen,
• 2:29
  Speaker 3: specifically deuterium and tritium.
• 2:31
  Speaker 2: And when you force them to combine.
• 2:33
  Speaker 3: They fuse into helium and in the process they release
• 2:36
  Speaker 3: a massive amount of clean energy along with a stray neutron.
• 2:40
  Speaker 2: So we're essentially trying to build a tiny star right
• 2:42
  Speaker 2: here on Earth.
• 2:43
  Speaker 3: It's the exact same physical process. Yeah, inside the Sun,
• 2:47
  Speaker 3: immense gravity is the crushing force that pushes hydrogen atoms
• 2:50
  Speaker 3: together until they fuse. But well, Earth doesn't have the
• 2:54
  Speaker 3: gravity at the Sun, thankfully, right, thankfully. So to compensate
• 2:58
  Speaker 3: for that lack of pressure, have to heat the hydrogen
• 3:01
  Speaker 3: isotopes to temperatures much hotter than the Sun's core. We're
• 3:04
  Speaker 3: talking over one hundred million degrees celsius.
• 3:08
  Speaker 2: That is just it's hard to even wrap your head
• 3:10
  Speaker 2: around that number. It is.
• 3:11
  Speaker 3: At that temperature, the gas turns into a soup of
• 3:13
  Speaker 3: electrically charged particles called plasma, and if you can hold
• 3:17
  Speaker 3: that plasma together long enough and tight enough, fusion happens.
• 3:21
  Speaker 2: And the byproduct is just helium right exactly.
• 3:23
  Speaker 3: There are no carbon emissions, no long lived radioactive waste,
• 3:27
  Speaker 3: and the fuel can literally be extracted from seawater and lithium.
• 3:31
  Speaker 2: It's the holy grail of physics, clean, abundant, virtually limitless energy.
• 3:36
  Speaker 2: And the whole reason it was thirty years away for
• 3:39
  Speaker 2: so long is because of this brutal mathematical reality called
• 3:42
  Speaker 2: net energy gain.
• 3:44
  Speaker 3: Right, the energy sink problem.
• 3:46
  Speaker 2: Yeah, because it took vastly more energy to run the
• 3:48
  Speaker 2: machines that heat and squeeze the plasma than the plasma
• 3:51
  Speaker 2: ever gave back. But these recent milestones have actually crossed
• 3:54
  Speaker 2: that threshold. They have.
• 3:56
  Speaker 3: The turning point for net gain really arrived via a
• 3:59
  Speaker 3: few distinct and engineering approaches. One of the primary methods
• 4:03
  Speaker 3: is called inertial confinement fusion.
• 4:05
  Speaker 2: And that's the one with the lasers, right.
• 4:06
  Speaker 3: Yes. The flagship facility for this is the National Ignition
• 4:10
  Speaker 3: Facility or NIFF out in California. Their approach relies entirely
• 4:14
  Speaker 3: on lasers. In April twenty twenty five, they fired their
• 4:17
  Speaker 3: laser ray at a tiny pellet of fuel.
• 4:20
  Speaker 2: Okay, so dropping a pellet, not a steady cloud, right.
• 4:22
  Speaker 3: A tiny pellet and the resulting fusion reaction produced eight
• 4:26
  Speaker 3: point six megajewls of energy output in some of their shots.
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  Speaker 3: The energy that came out of the pellet was actually
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  Speaker 3: more than four times the energy of the lasers that
• 4:34
  Speaker 3: went into it.
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  Speaker 2: I need to visualize this, So it's like trying to
• 4:37
  Speaker 2: perfectly crush a basketball down to the size of a
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  Speaker 2: pee by hitting it with I don't know, one hundred
• 4:42
  Speaker 2: and ninety two baseball bats at the exact same microsecond
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  Speaker 2: from every possible angle.
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  Speaker 3: That's a shockingly accurate analogy. Honestly, the precision required is
• 4:51
  Speaker 3: just staggering a fraction of a nano er second off
• 4:54
  Speaker 3: or slight imbalance in the laser energy, and the pellet
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  Speaker 3: just blows apart asymmetrically instead of imploding. Wow, but getting
• 5:01
  Speaker 3: four times the energy out of that pellet proves that
• 5:04
  Speaker 3: the fundamental physics of ignition are sound.
• 5:07
  Speaker 2: Okay, let me pause you right there because I have
• 5:09
  Speaker 2: an obvious question and I'm sure you listening, or what
• 5:11
  Speaker 2: are the exact same thing? Okay, go ahead. If NIF
• 5:14
  Speaker 2: is putting in one unit of energy and getting four
• 5:17
  Speaker 2: units back, why aren't our houses powered by giant lasers
• 5:20
  Speaker 2: right now? Like? Why is the grid still struggling.
• 5:22
  Speaker 3: Ah, right, it comes down to the critical difference between
• 5:25
  Speaker 3: plasmaet gain and overall system efficiency. NIF achieved plasma.
• 5:30
  Speaker 2: Net gain, meaning just the pellet itself exactly.
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  Speaker 3: The fuel pellet itself produced four times more energy than
• 5:36
  Speaker 3: the laser light that directly hit it. But to generate
• 5:39
  Speaker 3: that laser light, NUFF relies on one hundred and ninety
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  Speaker 3: two stadium sized lasers built with nineteen nineties technology.
• 5:46
  Speaker 2: Oh, so the power dramas be insane.
• 5:48
  Speaker 3: It's enomous. The electricity required from the California grid just
• 5:52
  Speaker 3: to charge up the capacitor banks and fire those massive
• 5:55
  Speaker 3: lasers is staggering. When you zoom out and look at
• 5:58
  Speaker 3: the whole building, the system is still operating at a
• 6:01
  Speaker 3: massive energy loss.
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  Speaker 2: So NIFF is this incredible scientific coving ground. But it's
• 6:07
  Speaker 2: not a blueprint for a practical, plug and play commercial power.
• 6:11
  Speaker 3: Plant, right, it's not a power plant design.
• 6:13
  Speaker 2: So the physics inside the tiny pellet works beautifully, but
• 6:16
  Speaker 2: the heavy machinery surrounding it is terribly inefficient, which explains
• 6:19
  Speaker 2: why there is a completely different approach to building a star,
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  Speaker 2: one that doesn't use lasers at all.
• 6:24
  Speaker 3: Yes, magnetic confinement Instead of blasting Appeller, you use magnets
• 6:28
  Speaker 3: to trap a super hot, continuous cloud of plasma inside
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  Speaker 3: a giant doughnut shaped chamber. These machines are called dokomax,
• 6:35
  Speaker 3: and the.
• 6:36
  Speaker 2: Performance leaps there in late twenty twenty five have been
• 6:38
  Speaker 2: pretty phenomenal.
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  Speaker 3: Too, right, unbelievable really. China operates a tokamac called the
• 6:43
  Speaker 3: East Reactor. They refer to it as their artificial Sun. Recently,
• 6:48
  Speaker 3: East managed to maintain a statle plasma at extreme densities
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  Speaker 3: that pushed right past the Greenwald limit.
• 6:54
  Speaker 2: The Greenwald limit that is essentially the theoretical traffic jam
• 6:58
  Speaker 2: limit for plasma. Right. Basically, yeah, if you try to
• 7:00
  Speaker 2: pack too many particles into the magnetic donut, they just
• 7:02
  Speaker 2: crash into each other, destabilize, and the whole reaction fizzles out.
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  Speaker 3: That was the operating assumption for decades. It was viewed
• 7:09
  Speaker 3: as this hard ceiling for how dense and powerful a
• 7:12
  Speaker 3: tokemac could get. But East didn't just break that ceiling.
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  Speaker 3: They sustain those dense, high temperature pulses for over one
• 7:19
  Speaker 3: thousand seconds.
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  Speaker 2: Wow, over one thousand seconds.
• 7:22
  Speaker 3: Yeah, holding a violently hot star steady for over a
• 7:25
  Speaker 3: quarter of an hour without it touching the walls or
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  Speaker 3: collapsing is just a monumental feet of control. France's West
• 7:31
  Speaker 3: Reactor in South Korea's k Star are seeing similar breakthroughs.
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  Speaker 2: But even with these records, the traditional magnetic donut has
• 7:37
  Speaker 2: a fundamental flaw which brings us to honestly the weirdest
• 7:41
  Speaker 2: machine in the physics world, the Stellar Rator.
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  Speaker 3: It's a crazy design.
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  Speaker 2: It looks like someone took a normal tokamac and violently
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  Speaker 2: twisted it like a pretzel. It genuinely looks like modern art.
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  Speaker 2: Wait before we talk about the twist, why does a
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  Speaker 2: perfect donut leak in the first place.
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  Speaker 3: Well, in a perfectly symmetrical doughnut, the magnetic field isn't uniform.
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  Speaker 3: The magnetic coils are bunched closer together on the inner
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  Speaker 3: hole of the doughnut and spread further apart on.
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  Speaker 2: The outer edge, so it's stronger on the inside track.
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  Speaker 3: Exactly, the magnetic field is much stronger on the inside
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  Speaker 3: track than the outside track. Because of that imbalance, the
• 8:16
  Speaker 3: charged plasma particles naturally want to drift outward, like.
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  Speaker 2: A car taking a corner way too fast and sliding.
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  Speaker 3: Toward the guardrail, precisely to stop the plasma from hitting
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  Speaker 3: the outer wall. A traditional tokmac has to induce a
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  Speaker 3: massive electrical current directly through the plasm itself to hold
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  Speaker 3: it together, and sustaining that internal current for long periods
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  Speaker 3: is incredibly difficult.
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  Speaker 2: So how does the twisted pretzel fix that?
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  Speaker 3: A stellarator like Germany's Vandelstein seven X or W seven
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  Speaker 3: X solves this outward drift with geometry by physically twisting
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  Speaker 3: the magnetic field coils into a highly complex, non axisymmetric shape.
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  Speaker 3: The magnetic track itself constantly alternates Oh icy yeah. A
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  Speaker 3: particle drifting outward on one curve is immediately twisted to
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  Speaker 3: the inside on the next curve. The geometry literally cancels
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  Speaker 3: out the drift, so.
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  Speaker 2: The plasma essentially holds itself together just by following the
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  Speaker 2: twisted track. You don't need to pump it full of
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  Speaker 2: internal electrical currents.
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  Speaker 3: Right, It makes the plasma inherently stable. Calculating the exact
• 9:17
  Speaker 3: shape of those twisted magnets took massive supercomputers, but the
• 9:21
  Speaker 3: results just speak for themselves.
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  Speaker 2: What did W seven X actually achieve?
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  Speaker 3: In twenty twenty five, W seven X achieved a record
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  Speaker 3: one point eight gigajewels of energy turnover, holding the plasma
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  Speaker 3: steady for extended periods with zero internal current required. It
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  Speaker 3: strongly suggests the stellar rator might be the ultimate architecture
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  Speaker 3: for a commercial power plant.
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  Speaker 2: Because it needs to run twenty four hours a day
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  Speaker 2: three hundred and sixty five days a year without interruption.
• 9:44
  Speaker 2: But whether you are building a symmetrical doughnut or a
• 9:47
  Speaker 2: twisted pretzel, there was this massive bottleneck. Historically, these magnetic
• 9:52
  Speaker 2: reactors had to be colossal, literally the size of sports
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  Speaker 2: stadiums just to generate a strong enough field to squeeze
• 9:58
  Speaker 2: the plasma. Yeah, was a huge issue. But recently a
• 10:02
  Speaker 2: breakthrough in an entirely different field radically altered the physics
• 10:06
  Speaker 2: of fusion high temperature superconducting magnets, or HTS.
• 10:11
  Speaker 3: The arrival of HTS magnets completely rewrote the timeline in
• 10:15
  Speaker 3: a magnetic confinement reactor. The strength of your magnetic field
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  Speaker 3: dictates how tightly you can squeeze the plasma. The tighter
• 10:22
  Speaker 3: the squeeze, the hotter it gets, and the more fusion
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  Speaker 3: reactions occur.
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  Speaker 2: So it scales exponentially.
• 10:27
  Speaker 3: Right, the scaling is exponential. For decades, we relied on
• 10:30
  Speaker 3: low temperature superconductors. They worked, but they hit a hard
• 10:34
  Speaker 3: physical limit on how strong a magnetic field.
• 10:36
  Speaker 2: They could generate. And HTS changes that.
• 10:38
  Speaker 3: High temperature superconductors can generate dramatically stronger magnetic fields without
• 10:43
  Speaker 3: losing their superconducting properties. Because a stronger magnet squeezes the
• 10:48
  Speaker 3: plasma so much more efficiently. You can radically shrink the
• 10:51
  Speaker 3: physical size.
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  Speaker 2: Of the reactor, so you don't need a stadium.
• 10:54
  Speaker 3: No, you can build machine the size of a high
• 10:57
  Speaker 3: school gymnasium.
• 10:58
  Speaker 2: And the moment that happened, the economics just changed overnight.
• 11:01
  Speaker 2: If you can shrink the machine, you shrink the volume
• 11:04
  Speaker 2: of concrete, the steel, the construction time, The price tag
• 11:08
  Speaker 2: drops from the international lega project scale down to the
• 11:11
  Speaker 2: venture capital scale. Absolutely, Wall Street realized this wasn't just
• 11:15
  Speaker 2: a science experiment anymore. It was a commercial race.
• 11:18
  Speaker 3: For a long time, fusion was synonymous with massive, slow,
• 11:22
  Speaker 3: bureaucratic public efforts. The prime example is Eider, currently being
• 11:27
  Speaker 3: built in.
• 11:27
  Speaker 2: France, the big international one. Right.
• 11:29
  Speaker 3: Eider is a marvel of human cooperation. You know, thirty
• 11:32
  Speaker 3: three nations working together to build a towering, low temperature
• 11:36
  Speaker 3: superconducting tokomac. They recently got their final central solenoid modules,
• 11:41
  Speaker 3: the massive magnetic pillars, but it's slow. It is fundamentally
• 11:45
  Speaker 3: a research facility. Its goal is to produce five hundred
• 11:48
  Speaker 3: megawatts of power, but not until the late twenty thirties.
• 11:51
  Speaker 3: It's methodical and slow.
• 11:53
  Speaker 2: But because of HTS magnets, private start is realized. They
• 11:56
  Speaker 2: could just lap the massive public projects. The agility is insane.
• 12:01
  Speaker 2: Right now, we're seeing over ten billion dollars invested globally
• 12:05
  Speaker 2: across more than one hundred and sixty different private facilities.
• 12:07
  Speaker 3: The speed of the private sector is breathtaking. Take Commonwealth
• 12:11
  Speaker 3: Fusion Systems or CFS, a company that's spun out of MIT.
• 12:15
  Speaker 3: They are aggressively leveraging HTS magnets to assemble a compact
• 12:19
  Speaker 3: to COMAC called Spark near Boston, and their timeline is aggressive,
• 12:23
  Speaker 3: very They are aiming for first plasma by twenty twenty seven.
• 12:26
  Speaker 3: Their goal isn't just to turn the machine on. They
• 12:28
  Speaker 3: intend to demonstrate true net energy gain and a machine
• 12:31
  Speaker 3: a fraction of the size of.
• 12:32
  Speaker 2: Iter, and Spark isn't even the end goal, right, it's
• 12:34
  Speaker 2: just the prototype. They are already designing the actual commercial
• 12:38
  Speaker 2: power plant called IRC targeted for the early twenty thirties
• 12:41
  Speaker 2: near Richmond, Virginia.
• 12:42
  Speaker 3: Yeah, IRC would be a four hundred megawatt facility capable
• 12:45
  Speaker 3: of powering hundreds of thousands of homes.
• 12:48
  Speaker 2: And to move that fast, they aren't relying on trial
• 12:51
  Speaker 2: and error. They're partnering with Siemens in Nvidia to build
• 12:54
  Speaker 2: AI digital twins, simulating and optimizing every single mellimeter the
• 12:59
  Speaker 2: reactor in a virtual space before they ever bolt the
• 13:02
  Speaker 2: steel together.
• 13:03
  Speaker 3: The integration of the tech industry goes even deeper than simulation.
• 13:07
  Speaker 3: Look at companies like Helium Energy out in Washington State.
• 13:11
  Speaker 3: They are taking a completely different magneto in inertial approach
• 13:15
  Speaker 3: to fusion.
• 13:16
  Speaker 2: But the backing is the interesting part.
• 13:17
  Speaker 3: Right, The most telling detail is their backing. Helium is
• 13:21
  Speaker 3: heavily funded by Sam Altman, the CEO of Open AI.
• 13:24
  Speaker 3: They already have a signed power purchase agreement to supply
• 13:27
  Speaker 3: Microsoft with fifty megawatts of fusion electricity by twenty twenty eight.
• 13:32
  Speaker 2: Which perfectly sets up the massive reality driving this entire
• 13:35
  Speaker 2: gold rush. Why is big tech suddenly pouring billions into
• 13:38
  Speaker 2: building stars. I look at the current state of artificial
• 13:41
  Speaker 2: intelligence like a brilliant but endlessly hungry teenager who has
• 13:46
  Speaker 2: just moved into the global power grid's house.
• 13:48
  Speaker 3: That's a good way to put it.
• 13:49
  Speaker 2: And this teenager is eating absolutely everything in the fridge.
• 13:52
  Speaker 2: The grids simply cannot handle the appetite.
• 13:54
  Speaker 3: No, it can't. The energy demands of AI data centers
• 13:57
  Speaker 3: are excluding at a rate that traditional utili cannot accommodate.
• 14:01
  Speaker 3: A standard server rack in a normal data center might
• 14:04
  Speaker 3: draw five to ten kilowatts of power.
• 14:06
  Speaker 2: Pretty manageable, right.
• 14:07
  Speaker 3: But an AI optimized rack packed with high end GPUs
• 14:11
  Speaker 3: processing neural networks draws a staggering fifty to one hundred
• 14:14
  Speaker 3: and fifty kilowatts.
• 14:15
  Speaker 2: It's an order of magnitude hire and hyperscale.
• 14:18
  Speaker 3: AI facilities containing thousands of these racks are being built
• 14:21
  Speaker 3: all over the globe. Projections show that US data centers
• 14:24
  Speaker 3: alone could consume nine percent of the nation's total electricity
• 14:28
  Speaker 3: by twenty thirty nine percent.
• 14:30
  Speaker 2: That places immense strain on existing power grids. It does.
• 14:34
  Speaker 3: Wind and solar are crucial, but they are intermittent. They
• 14:37
  Speaker 3: rely on weather and daylight. An AI data center requires
• 14:40
  Speaker 3: two hundred and forty seven unwavering base load power. If
• 14:44
  Speaker 3: a power fluctuation causes a massive AI training run to fail.
• 14:47
  Speaker 3: It costs millions of dollars.
• 14:49
  Speaker 2: So fusion becomes the only grocery store. They can keep
• 14:51
  Speaker 2: up with that hungry teenager without boiling the planet in
• 14:54
  Speaker 2: carbon emissions. It's compact, it's dispatchable, and it's completely zero
• 14:58
  Speaker 2: carbon d theoretic drop a four hundred megawatt fusion plant
• 15:03
  Speaker 2: right next to a hyperscale data center in the middle
• 15:06
  Speaker 2: of a desert, completely independent of the weather or local
• 15:09
  Speaker 2: coal plants. Tech giants are funding fusion because they realized
• 15:13
  Speaker 2: it's a critical infrastructure requirement for their own survival.
• 15:17
  Speaker 3: The terrestrial application is driving the funding absolutely, but the
• 15:21
  Speaker 3: extreme physics required to boil water for AI servers is
• 15:25
  Speaker 3: inadvertently unlocking capabilities that extend far beyond the electrical grid.
• 15:29
  Speaker 2: This is where things transition from highly practical to something
• 15:33
  Speaker 2: straight out of a science fiction novel. Let's talk about
• 15:35
  Speaker 2: the deep space implications first. Because chemical rockets are hitting
• 15:40
  Speaker 2: a wall.
• 15:40
  Speaker 3: They really are. In rocketry, we talk about specific impulse.
• 15:44
  Speaker 3: You can think of it as the miles per gallon
• 15:45
  Speaker 3: rating of a space ship engine. Chemical rockets have terrible
• 15:48
  Speaker 3: specific impulse.
• 15:49
  Speaker 2: So they burn too fast right.
• 15:51
  Speaker 3: To go fast, you have to burn a massive amount
• 15:53
  Speaker 3: of heavy fuel, which means your ship has to be
• 15:55
  Speaker 3: huge just to carry the fuel required to move the fuel.
• 15:58
  Speaker 3: It's a vicious cycle, and solar power becomes practically useless
• 16:01
  Speaker 3: for propulsion or life support once you get past the
• 16:04
  Speaker 3: orbit of Jupiter.
• 16:05
  Speaker 2: It's like trying to cross the Pacific Ocean in a
• 16:07
  Speaker 2: rowboat and bringing all your own drinking water. The weight
• 16:11
  Speaker 2: just kills you.
• 16:12
  Speaker 3: A fusion reactor solves this entirely. Concepts like the direct
• 16:15
  Speaker 3: fusion drive being developed by companies like Pulsar Fusion change
• 16:19
  Speaker 3: the math of the solar system.
• 16:20
  Speaker 2: How does it work?
• 16:21
  Speaker 3: A fusion rocket provides incredibly high specific impulse, meaning it
• 16:26
  Speaker 3: uses a tiny mass of fuel to generate massive sustained thrust.
• 16:30
  Speaker 3: But crucially, because it's a power plant, it also provides
• 16:34
  Speaker 3: abundant onboard electricity for heavy scientific instruments and crew life support.
• 16:39
  Speaker 2: So if we swap chemical explosions for a fusion drive,
• 16:42
  Speaker 2: how much faster does the solar system become.
• 16:44
  Speaker 3: A fusion drive could potentially cut travel times to Mars
• 16:48
  Speaker 3: from the standards seven or eight months down to mere
• 16:50
  Speaker 3: weeks or a couple of months. It completely opens up
• 16:53
  Speaker 3: the Outer Solar System.
• 16:54
  Speaker 2: That's game changing for NASA.
• 16:56
  Speaker 3: Highly interesting to them. Yes, because it enables sustained ecpsleration.
• 17:00
  Speaker 3: You could send crude missions out to the asteroid belt,
• 17:03
  Speaker 3: or establish operations to mine helium three from the upper
• 17:06
  Speaker 3: atmospheres of gas giants.
• 17:08
  Speaker 2: Like Jupiter, which could then be shipped back to fuel
• 17:10
  Speaker 2: even more advanced fusion reactors. Okay, reducing Mars to a
• 17:14
  Speaker 2: month long trip is unbelievable, But even interstellar travel isn't
• 17:18
  Speaker 2: the wildest scientific byproduct emerging right now.
• 17:21
  Speaker 3: No, it's not.
• 17:22
  Speaker 2: I want to talk about the concept coming out of
• 17:24
  Speaker 2: the University of Cincinnati because when I realized what they
• 17:27
  Speaker 2: were proposing, my jaw actually dropped. They are suggesting that
• 17:31
  Speaker 2: we can use these commercial fusion power plants to hunt
• 17:35
  Speaker 2: for dark matter.
• 17:36
  Speaker 3: This represents a breath taking overlap between energy production and
• 17:40
  Speaker 3: fundamental particle physics. We have the Standard Model of Physics,
• 17:44
  Speaker 3: which is basically our current, incredibly successful rulebook for how
• 17:48
  Speaker 3: the sub atomic universe works.
• 17:50
  Speaker 2: But it's missing something.
• 17:51
  Speaker 3: It has a glaring hole. It cannot explain dark matter.
• 17:53
  Speaker 3: Dark matter makes up about eighty five percent of all
• 17:56
  Speaker 3: the matter in the universe. We know it exists because
• 17:58
  Speaker 3: we can observe its heavy grap vitational pole holding galaxies together,
• 18:02
  Speaker 3: but it's entirely invisible. It rarely, if ever, interacts with
• 18:05
  Speaker 3: ordinary matter or light.
• 18:07
  Speaker 2: So how on earth is a machine built to power
• 18:10
  Speaker 2: Microsoft Data Center help us find the invisible skeleton of
• 18:13
  Speaker 2: the universe.
• 18:14
  Speaker 3: It comes down to the extreme environment inside the reactor wall.
• 18:19
  Speaker 3: In a deuterium tritium fusion reaction, a massive flux of
• 18:23
  Speaker 3: high energy neutrons is thrown outward from the plasmak. To
• 18:27
  Speaker 3: capture that energy, the interior walls of the reactor are
• 18:30
  Speaker 3: lined with what are called lithium breeding blankets. The neutrons
• 18:34
  Speaker 3: smash into the lithium, generating intense heat to make electricity.
• 18:38
  Speaker 2: Right, that's the power part.
• 18:40
  Speaker 3: But theoretical physicists realize that in that chaotic high energy
• 18:43
  Speaker 3: collision zone, the neutrons hitting the reactor walls could trigger
• 18:47
  Speaker 3: incredibly rare nuclear processes. These processes might generate a hypothetical
• 18:52
  Speaker 3: particle called an axion.
• 18:54
  Speaker 2: Wait, an axion, I've seen that term thrown around in
• 18:57
  Speaker 2: theoretical physics papers, but I thought it was completely hypothetical.
• 19:00
  Speaker 2: Are you saying a power plant could just accidentally manufacture them?
• 19:03
  Speaker 3: Yes, axions are ultra light particles that currently stand as
• 19:06
  Speaker 3: one of the leading candidates for what dark matter actually is.
• 19:09
  Speaker 3: And the massive continuous neutron bombardment inside a commercial fusion
• 19:13
  Speaker 3: plant could inadvertently turn the reactor into a giant axion factory.
• 19:17
  Speaker 2: So let me make sure I'm wrapping my head around this.
• 19:20
  Speaker 2: We build a machine to generate electricity for AI algorithms.
• 19:24
  Speaker 2: Inside that machine, we recreate the core of a star,
• 19:29
  Speaker 2: and as a completely accidental byproduct of the exhaust hitting
• 19:32
  Speaker 2: the wall, we might be spewing out the very particles
• 19:35
  Speaker 2: that make up eighty five percent of the universe. We
• 19:37
  Speaker 2: could just set up a dedicated dark matter detector right
• 19:40
  Speaker 2: next door in the parking lot to catch them.
• 19:42
  Speaker 3: Pretty much. Yeah. It transforms a notoriously difficult theoretical physics
• 19:46
  Speaker 3: problem into a practical experimental pathway. A commercial plant doubles
• 19:52
  Speaker 3: as a particle accelerator, exploring physics beyond the standard model.
• 19:56
  Speaker 2: That's wild.
• 19:57
  Speaker 3: It echoes how early nuclear fission reactors in the nineteen
• 19:59
  Speaker 3: five provided profound insights into quantum mechanics simply because scientists
• 20:04
  Speaker 3: finally had a machine that produced enough localized radiation to study.
• 20:08
  Speaker 2: That is, awe inspiring. We are hunting for the fundamental
• 20:11
  Speaker 2: nature of reality as a side hustle to powering server farms,
• 20:15
  Speaker 2: but as incredible as axion factories in Mars rockets are.
• 20:18
  Speaker 2: I don't want to get totally lost in the stars here, right.
• 20:20
  Speaker 3: We still have work to do here.
• 20:21
  Speaker 2: We need to bring this back down to Earth because
• 20:24
  Speaker 2: bringing these artificial suns to life still requires overcoming some
• 20:29
  Speaker 2: very physical, highly unglamorous engineering hurdles.
• 20:33
  Speaker 3: The reality of the timeline is completely grounded in these hurdles.
• 20:37
  Speaker 3: Proving the physics of net gain was just the first step. Next,
• 20:41
  Speaker 3: we have to demonstrate a sustained high Q.
• 20:44
  Speaker 2: Factor Q factor meaning the point where the plasma is
• 20:47
  Speaker 2: hot enough that the fusion reaction largely heats itself, allowing
• 20:50
  Speaker 2: you to turn off the external lasers or heating magnets.
• 20:53
  Speaker 3: Exactly a self sustaining burn. Furthermore, we have to perfect
• 20:57
  Speaker 3: the tritium breeding process. Tritium, one of the hydrogen isotopes
• 21:01
  Speaker 3: we use for fuel, is incredibly rare on Earth, but
• 21:04
  Speaker 3: we have to make it. These reactors cannot rely on
• 21:06
  Speaker 3: an external supply chain. They must breed their own tritium
• 21:10
  Speaker 3: fuel continuously by using those lithium blankets we just discussed.
• 21:13
  Speaker 3: If the blanket fails to breed enough tritium, the reactor
• 21:16
  Speaker 3: just starves itself.
• 21:17
  Speaker 2: And then there's the materials challenge. If you listening are
• 21:20
  Speaker 2: wondering why material science is the defining bottleneck right now,
• 21:24
  Speaker 2: think about trying to build a thermos to hold a
• 21:26
  Speaker 2: piece of the literal sun. The sun doesn't just melt
• 21:29
  Speaker 2: the inside of the thermos. The sheer bombardment of neutrons
• 21:33
  Speaker 2: alters the very atomic structure of the metal. It turns
• 21:36
  Speaker 2: strong alloys incredibly brittle until they shatter.
• 21:40
  Speaker 3: It really is the defining engineering challenge of our time.
• 21:43
  Speaker 3: The interior wall of a reactor is subjected to heat,
• 21:46
  Speaker 3: fluxes and neutron degradation that would vaporize most known metals instantly.
• 21:50
  Speaker 2: So how are we fixing that?
• 21:52
  Speaker 3: Laboratories like MIT's Lab for Materials and Nuclear Technologies are
• 21:57
  Speaker 3: working overtime to develop advanced tongues to cladding and novel
• 22:01
  Speaker 3: alloys that can withstand this environment. If the materials degrade
• 22:05
  Speaker 3: too quickly, the economic viability of the entire power plant.
• 22:08
  Speaker 2: Collapses because you'd have to constantly shut it down, open
• 22:11
  Speaker 2: it up, and rebuild the inner wall, and nobody is
• 22:14
  Speaker 2: going to finance a billion dollar power plant if it
• 22:17
  Speaker 2: has to be shut down for maintenance every six months.
• 22:19
  Speaker 2: Definitely not so. Considering the hurdles the self heating plasma,
• 22:23
  Speaker 2: the self sustaining, trading, breeding, and surviving the atomic degradation.
• 22:27
  Speaker 2: What is the actual realistic timeline we are looking at.
• 22:30
  Speaker 3: The consensus among the optimistic but realistic experts is that
• 22:34
  Speaker 3: we will see functional pilot plants proving continuous net energy
• 22:37
  Speaker 3: gain and grid viability in the late twenty twenties and
• 22:41
  Speaker 3: early twenty thirties.
• 22:42
  Speaker 2: That's right around the corner, it is.
• 22:44
  Speaker 3: And from there the commercial rollout, where we start seeing
• 22:46
  Speaker 3: fleets of these compact fusion plants actually replacing coal and
• 22:50
  Speaker 3: gas facilities, will scale up aggressively throughout the twenty thirties
• 22:54
  Speaker 3: and twenty forties.
• 22:55
  Speaker 2: It's incredible. The treadmill is officially off. We are sprinting
• 23:00
  Speaker 2: toward a future where we have successfully bottled a star,
• 23:04
  Speaker 2: which leads us with a pretty profound thought to chew
• 23:06
  Speaker 2: on as we wrap up.
• 23:07
  Speaker 3: Yeah, it's a big shift.
• 23:08
  Speaker 2: For all of human history, our development, our conflicts, and
• 23:11
  Speaker 2: our daily lives have been defined by resource scarcity wars,
• 23:15
  Speaker 2: are fought over oil fields, ancient rivers are damned and
• 23:18
  Speaker 2: destroyed for power, and we burn millions of years of
• 23:21
  Speaker 2: compressed ancient forests in the form of coal just to
• 23:25
  Speaker 2: keep the lights on and stop from freezing.
• 23:27
  Speaker 3: It's always been about limits.
• 23:28
  Speaker 2: If fusion successfully decarbonizes the world and provides virtually infinite,
• 23:33
  Speaker 2: clean energy from a cup of seawater, it removes one
• 23:36
  Speaker 2: of humanity's greatest historical constraints, the ultimate limit on what
• 23:40
  Speaker 2: we can do and how much energy we can expand
• 23:42
  Speaker 2: doing it just vanishes, absolutely vanishes. The question you have
• 23:46
  Speaker 2: to ask yourself is, when we finally have a star
• 23:49
  Speaker 2: in a bottle, will we use that limitless power merely
• 23:52
  Speaker 2: to run our AI algorithms faster, generating better targeted ads
• 23:56
  Speaker 2: and synthetic videos, or will we use it to step
• 23:58
  Speaker 2: out into the cosmos and solve the remaining eighty five
• 24:01
  Speaker 2: percent of the universe's mysteries.
• 24:02
  Speaker 3: That is the ultimate choice humanity is going to face.
• 24:05
  Speaker 2: Something to ponder as you look up at the actual
• 24:07
  Speaker 2: stars tonight,