Loading video...

Video Failed to Load

Go Home

Quantum processors rely on superconductivity, which only emerges at extremely low temperatures. Using dilution refrigeration, we cool systems to 0.01 kelvin, colder than outer space →

24,576 views • 11 months ago •via X (Twitter)

0 Comments

No comments available

Comments from the original post will appear here

Related Videos

HOW TO COOL AI SERVERS IN LOW EARTH ORBIT—SOLVED - Revolutionary Cooling for Space-Based AI: Adapting JWST’s Acoustic Cryogenic System for the Next Frontier The unforgiving vacuum of space, where temperatures plummet to near absolute zero, managing heat is a paradoxical challenge. Satellites and spacecraft generate internal warmth from electronics, processors, and power systems, but they can’t rely on air or water for dissipation—there’s no atmosphere to conduct it away. Traditional methods like radiative heat sinks have served us well, beaming excess thermal energy into the void as infrared radiation. Yet, as we push toward deploying massive AI servers in orbit—think constellations of edge-computing nodes for real-time data analysis, autonomous satellite swarms, or even orbital supercomputers—these old reliables fall short. Enter the James Webb Space Telescope’s (JWST) ingenious cryogenic cooling system, which leverages acoustic waves to chill instruments to just 7 Kelvin (-266°C). This isn’t science fiction; it’s proven technology that’s already orbiting 1.5 million kilometers from Earth. In this article, we’ll explore how this system can be repurposed to cool space-based AI servers, and why it’s not just superior but the lowest-cost option compared to radiative sinks, thermoelectric coolers, or other alternatives. The JWST Cooling Marvel: Sound Waves as the Ultimate Chill Factor At the heart of JWST’s success is its ability to maintain ultra-low temperatures for its sensitive infrared detectors, which peer into the universe’s coolest phenomena—like distant galaxies shrouded in cosmic dust. Unlike optical telescopes that can tolerate room temperature, JWST’s instruments demand cryogenic conditions to suppress thermal noise, ensuring faint signals aren’t drowned out by the hardware’s own heat. The star of the show is the pulse-tube cryocooler, a mechanical refrigerator that uses sound waves—specifically, oscillating pressure waves generated by a pair of piston-like pumps—to drive a refrigeration cycle without any moving parts in the cold sections. Here’s how it breaks down: 1The Acoustic Engine: Linear compressors (essentially high-frequency pistons) create rhythmic pressure pulses, akin to a low-hum rumble from a subwoofer. These “sound waves” propagate through a tube filled with high-pressure helium gas, compressing and expanding it rhythmically. 2The Regenerator Magic: The waves pass through a porous regenerator matrix (made of materials like lead spheres or rare-earth compounds) that stores and releases “coldness.” As the helium expands in the cold end, it absorbs heat from the telescope’s optics; on the compression stroke, that heat is shuttled back toward the warmer sections. 3Multi-Stage Precision: JWST employs a three-stage setup. The first two stages cool to around 18K and 50K using passive techniques like Joule-Thomson expansion (where gas cools as it expands through a valve). The third stage, the pulse-tube heart, drops the mid-infrared instrument (MIRI) to 7K. This staged approach minimizes power draw while maximizing efficiency. 4Heat Exile via Exchangers: Waste heat from the warm end—peaking at about 27°C from electronics and compressors—is captured by compact heat exchangers. These finned, aerospace-grade radiators then radiate it away, often aided by the spacecraft’s deliberate “wobble” (a 2 RPM rotation) to evenly expose surfaces to deep space. No massive fins needed; the system is sleeker than a smartphone. This setup consumes just 200-300 watts—less than a desktop PC—yet cools to temperatures unattainable by passive means. It’s vibration-isolated too, with counter-rotating pumps canceling out shakes that could blur JWST’s pinpoint images. Proven over years in orbit, it’s a testament to engineering elegance: turning sound into silence, heat into cosmic clarity. 1 of 3

Brian Roemmele

264,725 views • 8 months ago

My 10x stock idea from GTC isn't photonics?! But it does involve lasers. Say hello to $INFQ. It's a newly IPO'd quantum stock generating tens of millions in revenue in space + defense applications with very unique technology. Infleqtion went public last month but it's trading 40% below its IPO price with a sub $2B market cap. $INFQ trades at roughly 70x trailing sales on $29M in revenue. Compare that to $RGTI at $6B market cap on just $7M in revenue, that's 860x sales. I chatted with $INFQ's Chief Administrative Officer, Julie McGee, to dig in further but here's the TLDR. Most quantum companies need to cool their chips to near absolute zero temps just to operate. Infleqtion uses "neutral atom" technology that traps individual atoms inside a glass cell using lasers and runs them at room temperature. It takes the power of a few hairdryers. No giant refrigerators. Way cheaper and way easier to scale. And unlike most quantum names they're actually shipping products NOW. Quantum clocks for GPS-denied navigation, RF sensors, inertial navigation systems. Selling to NASA, the DoD, and the UK government. Their quantum clock is being qualified by SpaceX for satellite systems. Quantum brings a whole new level of precision that works on the ground, in the sky, and underwater. Their technology can enable submarines to navigate without ever linking up to a satellite. GPS jamming is also becoming a huge problem on the battlefield, showing up in Ukraine and Iran. Quantum timing is inherently unjammable and unspoofable. They also had a dedicated spot inside the Nvidia booth at GTC. $INFQ partnered with Nvidia to demo the first commercial materials science application running on logical qubits and are working with Nvidia's NVQLink to scale quantum-classical hybrid computing. What's next: 30 logical qubits targeted this year, one of the most important milestones in the race to fault tolerant quantum computing by 2028. Plus a new NASA contract to measure Earth's gravity from space. Infleqtion combines an attractive valuation with extremely unique technology (they're the only neutral atom quantum company publicly listed). Could easily see this re-rating fast, I just think the IPO timing was poor with Iran. Could be adding this as a lottery ticket to my Asymmetrical Bets portfolio soon... This post was not sponsored or influenced in any way by $INFQ. All thoughts are my own, NFA / DYOR.

Michael Sikand

321,848 views • 4 months ago