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Friday, July 11, 2025
Techcratic
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  • AI
    Artificial Intelligence

    Enabling Differentially Private Federated Learning for Speech Recognition: Benchmarks, Adaptive Optimizers, and Gradient Clipping

    Artificial Intelligence

    Overcoming Vocabulary Constraints with Pixel-level Fallback

    Artificial Intelligence

    Uphold ethical standards in fashion using multimodal toxicity detection with Amazon Bedrock Guardrails

    Artificial Intelligence

    10 Surprising Things You Can Do with Python’s datetime Module

    Artificial Intelligence

    New capabilities in Amazon SageMaker AI continue to transform how organizations develop AI models

    Artificial Intelligence

    Unlock retail intelligence by transforming data into actionable insights using generative AI with Amazon Q Business

    Artificial Intelligence

    Scale generative AI use cases, Part 1: Multi-tenant hub and spoke architecture using AWS Transit Gateway

    Artificial Intelligence

    Build a just-in-time knowledge base with Amazon Bedrock

    Artificial Intelligence

    Transforming network operations with AI: How Swisscom built a network assistant using Amazon Bedrock

  • Apple
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    New ‘HomePad’ product gets fresh launch timing update

    M4 MacBook Air, iPhone, AirPods, iPad, more 9to5Mac

    M4 MacBook Air, iPhone, AirPods, iPad, more 9to5Mac

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    Apple Watch Ultra 3: Three new features are coming next year

    Apple Watch Ultra 3: Three new features are coming this fall

    Report: Apple set to land US F1 streaming rights in $150 million+ deal

    Report: Apple set to land US F1 streaming rights in $150 million+ deal

    Fresh leak confirms new iPhone 17 and iPhone 17 Air colors

    Fresh leak confirms new iPhone 17 and iPhone 17 Air colors

    Apple reviving its discontinued AirPort router has never looked more likely

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    Apple leaders join Sun Valley gathering of tech & media

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  • ComputerWorld
    AI coding tools can slow down seasoned developers by 19%

    AI coding tools can slow down seasoned developers by 19%

    Will IT turn the AI bot battle into a money maker? (And is that even a good idea?) – Computerworld

    Will IT turn the AI bot battle into a money maker? (And is that even a good idea?) – Computerworld

    Tariff uncertainty hits US PC shipments in Q2 – Computerworld

    Tariff uncertainty hits US PC shipments in Q2 – Computerworld

    The fast way to fix a frozen Start menu or taskbar in Windows – Computerworld

    The fast way to fix a frozen Start menu or taskbar in Windows – Computerworld

    Microsoft’s 19-hour Outlook outage exposes fragility in cloud infrastructure – Computerworld

    Microsoft’s 19-hour Outlook outage exposes fragility in cloud infrastructure – Computerworld

    A magically minimalist Android makeover – Computerworld

    A magically minimalist Android makeover – Computerworld

    From conversation to task completion – Computerworld

    From conversation to task completion – Computerworld

    OpenAI and Perplexity enter browser wars to take on Chrome – Computerworld

    OpenAI and Perplexity enter browser wars to take on Chrome – Computerworld

    Using OneDrive for Web – Computerworld

    Using OneDrive for Web – Computerworld

  • Gaming
    Hebra's Side Quest | Zelda: Breath of the Wild 100% Walkthrough “103/127” (No Commentary)

    Hebra's Side Quest | Zelda: Breath of the Wild 100% Walkthrough “103/127” (No Commentary)

    Zelda Breath of the Wild – 27 Ways to Make a Campfire

    Zelda Breath of the Wild – 27 Ways to Make a Campfire

    Ocarina of Time Walkthrough Let's Play – Part 3

    Ocarina of Time Walkthrough Let's Play – Part 3

    Should Charles Martinet voice Mario in The Super Mario Bros. Movie?*

    Should Charles Martinet voice Mario in The Super Mario Bros. Movie?*

    Final Fantasy producer Yoshi-P says ‘there’s no clear-cut answer’ to whether Final Fantasy will return to turn-based RPGs, because the direction of the next Final Fantasy will be up to the directors of the next Final Fantasy

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    Zelda Ocarina of Time 3D 100% Walkthrough – Part 72/78 – Gerudo Training Ground Part 1 (Commentary)

    Zelda Ocarina of Time 3D 100% Walkthrough – Part 72/78 – Gerudo Training Ground Part 1 (Commentary)

    Capcom celebrates the first anniversary of Kunitsu-Gami: Path of the Goddess by ripping out its Denuvo DRM

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    The Legend of Zelda: Breath of the Wild – Daka Tuss Shrine Walkthrough

    The Legend of Zelda: Breath of the Wild – Daka Tuss Shrine Walkthrough

    30 MORE Things You STILL Didn't Know In Zelda Breath Of The Wild

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  • Retro Rewind
    Retro Rewind: Electronic Games April 1995

    Retro Rewind: Electronic Games April 1995

    Retro Rewind: Electronic Gaming Monthly Magazine Number 55 February 1994

    Retro Rewind: Electronic Gaming Monthly Magazine Number 57 April 1994

    Retro Rewind: Blast from the Past – 35 Iconic Commercials of 1988!

    Retro Rewind: Blast from the Past – 35 Iconic Commercials of 1988!

    Retro Rewind: PC World Magazine August 1998

    Retro Rewind: PC World Magazine August 1998

    Retro Rewind: Computer Shopper Magazine September 1997

    Retro Rewind: Computer Shopper Magazine September 1997

    Retro Rewind: PC Magazine December 2015

    Retro Rewind: PC Magazine December 2015

    Retro Rewind: EDGE Magazine RETRO #1: The Guide to Classic Videogame Playing and Collecting

    Retro Rewind: EDGE Magazine RETRO #1: The Guide to Classic Videogame Playing and Collecting

    Retro Rewind: Computer Gaming World Magazine Issue 73 December 1998

    Retro Rewind: Computer Gaming World Magazine Issue 73 December 1998

    Retro Rewind: Electronic Gaming Monthly Magazine Number 55 February 1994

    Retro Rewind: Electronic Gaming Monthly Magazine Number 55 February 1994

  • Tech Art
    How Artificial Intelligence is slowly becoming less art-ificial | Amir Baradaran | TEDxBocaRaton

    How Artificial Intelligence is slowly becoming less art-ificial | Amir Baradaran | TEDxBocaRaton

    Northern Lights Aurora Night Sky Vector Art Tutorial Affinity Designer V2

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    The 3-Piece Collage Trick I Can’t Stop Using #visualdiary

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    GIGANOTOSSAURO (Desenhando com Thiago)

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    Artist Spotlight: Nina Molloy

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    Interactive Particle Systems from Gaussian Splats in TouchDesigner! (2025 + Mac Compatible)

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    I Made Leon S. Kennedy (Resident Evil 4) | Timelapse Sculpture

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    Pixel art is here

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    AI Generative Art 1 – Robots | Vortex Creative

    AI Generative Art 1 – Robots | Vortex Creative

  • Tech Deals
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    Crucial X9 2TB Portable SSD, Up to 1050MB/s, USB 3.2 USB-C, External Solid State Drive,…

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    CORSAIR VIRTUOSO RGB WIRELESS XT Multiplatform Gaming Headset With Bluetooth – Dolby…

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    RK ROYAL KLUDGE S108 Typewriter Keyboard, Retro Mechanical Gaming Keyboard Wired 108…

    RK ROYAL KLUDGE S108 Typewriter Keyboard, Retro Mechanical Gaming Keyboard Wired 108…

    GTRACING Gaming Chair with Speakers Bluetooth Music Video Game Chair Audio Ergonomic…

    GTRACING Gaming Chair with Speakers Bluetooth Music Video Game Chair Audio Ergonomic…

  • Techs Got To Eat
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    Bacon & Spinach Mug Quiche: 3-Minute Gourmet Breakfast

    Cheesy Broccoli Rice Mug: 5-Minute Super Comfort Food

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    Top 10 Vegetarian Recipes for 2025: Easy and Nutritious Meals for Busy People

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    Bacon Mug Lasagna: 5-Minute Microwave Meat Lover’s Dream

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    Bacon Fried Rice Mug: 5-Minute Microwave Meal

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    Bacon & Cheddar Mug Biscuit: 2-Minute Savory Comfort

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    Loaded Bacon Cheesy Potato Mug: 5-Minute Comfort Food

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    Peanut Butter Banana Mug Muffin: 5-Minute Protein Snack

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    Oreo Mug Cake: 2-Minute Cookie & Cake Combo!

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  • Tesla
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    KAYI Car Seat Cover, Memory Foam Car Seat Cushion, Non-Slip Bottom Breathable Car Seat…

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    Cybertruck Screen Protector, Cybertruck Accessories, 2024 Tesla Car Matte…

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  • UFO
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    The Chosen: Season 1-4 – Standard Edition DVD 4-Pack

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    New “Metallic Sphere UFO” videos in Buga Colombia

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    Marilyn Monroe, JFK, and the Alien Conspiracy You’ve Never Heard Of

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  • AI
    Artificial Intelligence

    Enabling Differentially Private Federated Learning for Speech Recognition: Benchmarks, Adaptive Optimizers, and Gradient Clipping

    Artificial Intelligence

    Overcoming Vocabulary Constraints with Pixel-level Fallback

    Artificial Intelligence

    Uphold ethical standards in fashion using multimodal toxicity detection with Amazon Bedrock Guardrails

    Artificial Intelligence

    10 Surprising Things You Can Do with Python’s datetime Module

    Artificial Intelligence

    New capabilities in Amazon SageMaker AI continue to transform how organizations develop AI models

    Artificial Intelligence

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    Artificial Intelligence

    Scale generative AI use cases, Part 1: Multi-tenant hub and spoke architecture using AWS Transit Gateway

    Artificial Intelligence

    Build a just-in-time knowledge base with Amazon Bedrock

    Artificial Intelligence

    Transforming network operations with AI: How Swisscom built a network assistant using Amazon Bedrock

  • Apple
    New ‘HomePad’ product gets fresh launch timing update

    New ‘HomePad’ product gets fresh launch timing update

    M4 MacBook Air, iPhone, AirPods, iPad, more 9to5Mac

    M4 MacBook Air, iPhone, AirPods, iPad, more 9to5Mac

    Leaker teases Dynamic Island’s ‘significant evolution’ ahead

    Leaker teases Dynamic Island’s ‘significant evolution’ ahead

    July 11, 2025 – Apple’s plans for new Macs, iPads, and more

    Apple Watch Ultra 3: Three new features are coming next year

    Apple Watch Ultra 3: Three new features are coming this fall

    Report: Apple set to land US F1 streaming rights in $150 million+ deal

    Report: Apple set to land US F1 streaming rights in $150 million+ deal

    Fresh leak confirms new iPhone 17 and iPhone 17 Air colors

    Fresh leak confirms new iPhone 17 and iPhone 17 Air colors

    Apple reviving its discontinued AirPort router has never looked more likely

    Apple’s AirPort products are now ‘obsolete,’ with one exception

    Apple leaders join Sun Valley gathering of tech & media

    Apple leaders join Sun Valley gathering of tech & media

  • ComputerWorld
    AI coding tools can slow down seasoned developers by 19%

    AI coding tools can slow down seasoned developers by 19%

    Will IT turn the AI bot battle into a money maker? (And is that even a good idea?) – Computerworld

    Will IT turn the AI bot battle into a money maker? (And is that even a good idea?) – Computerworld

    Tariff uncertainty hits US PC shipments in Q2 – Computerworld

    Tariff uncertainty hits US PC shipments in Q2 – Computerworld

    The fast way to fix a frozen Start menu or taskbar in Windows – Computerworld

    The fast way to fix a frozen Start menu or taskbar in Windows – Computerworld

    Microsoft’s 19-hour Outlook outage exposes fragility in cloud infrastructure – Computerworld

    Microsoft’s 19-hour Outlook outage exposes fragility in cloud infrastructure – Computerworld

    A magically minimalist Android makeover – Computerworld

    A magically minimalist Android makeover – Computerworld

    From conversation to task completion – Computerworld

    From conversation to task completion – Computerworld

    OpenAI and Perplexity enter browser wars to take on Chrome – Computerworld

    OpenAI and Perplexity enter browser wars to take on Chrome – Computerworld

    Using OneDrive for Web – Computerworld

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  • Gaming
    Hebra's Side Quest | Zelda: Breath of the Wild 100% Walkthrough “103/127” (No Commentary)

    Hebra's Side Quest | Zelda: Breath of the Wild 100% Walkthrough “103/127” (No Commentary)

    Zelda Breath of the Wild – 27 Ways to Make a Campfire

    Zelda Breath of the Wild – 27 Ways to Make a Campfire

    Ocarina of Time Walkthrough Let's Play – Part 3

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    Should Charles Martinet voice Mario in The Super Mario Bros. Movie?*

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    Final Fantasy producer Yoshi-P says ‘there’s no clear-cut answer’ to whether Final Fantasy will return to turn-based RPGs, because the direction of the next Final Fantasy will be up to the directors of the next Final Fantasy

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    Zelda Ocarina of Time 3D 100% Walkthrough – Part 72/78 – Gerudo Training Ground Part 1 (Commentary)

    Zelda Ocarina of Time 3D 100% Walkthrough – Part 72/78 – Gerudo Training Ground Part 1 (Commentary)

    Capcom celebrates the first anniversary of Kunitsu-Gami: Path of the Goddess by ripping out its Denuvo DRM

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    The Legend of Zelda: Breath of the Wild – Daka Tuss Shrine Walkthrough

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    30 MORE Things You STILL Didn't Know In Zelda Breath Of The Wild

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  • Retro Rewind
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    Retro Rewind: Electronic Games April 1995

    Retro Rewind: Electronic Gaming Monthly Magazine Number 55 February 1994

    Retro Rewind: Electronic Gaming Monthly Magazine Number 57 April 1994

    Retro Rewind: Blast from the Past – 35 Iconic Commercials of 1988!

    Retro Rewind: Blast from the Past – 35 Iconic Commercials of 1988!

    Retro Rewind: PC World Magazine August 1998

    Retro Rewind: PC World Magazine August 1998

    Retro Rewind: Computer Shopper Magazine September 1997

    Retro Rewind: Computer Shopper Magazine September 1997

    Retro Rewind: PC Magazine December 2015

    Retro Rewind: PC Magazine December 2015

    Retro Rewind: EDGE Magazine RETRO #1: The Guide to Classic Videogame Playing and Collecting

    Retro Rewind: EDGE Magazine RETRO #1: The Guide to Classic Videogame Playing and Collecting

    Retro Rewind: Computer Gaming World Magazine Issue 73 December 1998

    Retro Rewind: Computer Gaming World Magazine Issue 73 December 1998

    Retro Rewind: Electronic Gaming Monthly Magazine Number 55 February 1994

    Retro Rewind: Electronic Gaming Monthly Magazine Number 55 February 1994

  • Tech Art
    How Artificial Intelligence is slowly becoming less art-ificial | Amir Baradaran | TEDxBocaRaton

    How Artificial Intelligence is slowly becoming less art-ificial | Amir Baradaran | TEDxBocaRaton

    Northern Lights Aurora Night Sky Vector Art Tutorial Affinity Designer V2

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    Interactive Particle Systems from Gaussian Splats in TouchDesigner! (2025 + Mac Compatible)

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    I Made Leon S. Kennedy (Resident Evil 4) | Timelapse Sculpture

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    Pixel art is here

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    AI Generative Art 1 – Robots | Vortex Creative

    AI Generative Art 1 – Robots | Vortex Creative

  • Tech Deals
    Hitachi 322898 Side Handle C10FCE2 C10FCH2 Replacement Part

    Hitachi 322898 Side Handle C10FCE2 C10FCH2 Replacement Part

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Home Hacker News

New Zealand Team Prepares to Test Electric Propulsion System

Hacker News by Hacker News
February 28, 2025
in Hacker News
Reading Time: 9 mins read
129
A A
0

2025-02-24 09:06:00
spectrum.ieee.org

Nestled at the foot of a steep, forested hill, 16 kilometers outside Wellington, New Zealand, is a rather unassuming building; one among many on a research campus that was first established in the 1940s. From outside, there’s little to suggest that this is the birthplace of a remarkable piece of technology bound for the International Space Station (ISS) in the coming months.

The building is home to the Paihau-Robinson Research Institute, part of Victoria University of Wellington. And the technology being developed there could one day reduce the space industry’s reliance on chemical rockets.

“Our focus here is applied-field magnetoplasmadynamic [AF-MPD] thrusters. It’s a class of electric propulsion that uses an applied magnetic field to accelerate ions to extremely high speeds,” says Randy Pollock, the chief engineer for space at Paihau-Robinson, during a visit to its labs.

This group isn’t the first to work on AF-MPD thrusters—the technology has been tinkered with since the 1970s—but Pollock and his team have overcome a major hurdle to their application in spacecraft. Rather than use conventional copper electromagnets to create the magnetic field, their magnet is made with high‐temperature superconductors (HTS); a class of materials that have close-to-zero electrical resistance, allowing them to generate strong magnetic fields while consuming minimal power.

How Electric Propulsion Works

In 2023, Paihau-Robinson installed the first version of its superconducting electromagnet onto an existing ion thruster at Nagoya University in Japan. The magnet operates at the “high temperature” (as far as superconductors are concerned) of -198.15 °C (75 kelvins). To reach that temperature, the researchers used a cryocooler—effectively a miniaturized mechanical refrigerator—that had previously been qualified for spaceflight. This did away with the need for a continuous flow of expensive liquid helium.

They successfully fired the thruster over a hundred times, and generated magnetic fields of 1 tesla with less than 1 watt of magnet power. That was a 99 percent reduction in input power compared to a copper electromagnet, while generating a field three times as strong.

Back at the lab in Wellington, the team are now developing their own thruster, which they test inside a car-size vacuum chamber. Atop the chamber is a soft toy kōkako—the mascot for their mission, and its namesake. The kōkako is a species of bird native to New Zealand, instantly recognizable thanks to a rich blue wattle under its beak. “To name these missions, we worked with Professor Rawinia Higgins, who is the deputy vice-chancellor (Māori) at Victoria,” says Betina Pavri, a senior principal engineer at Paihau-Robinson. “Kōkako comes from the fact that the plasma glows a distinctive blue-purple color when the thruster is in operation.”

The HTS magnet, barely visible inside the vacuum chamber, comprises four “double-pancake” coils of superconducting tape. It’s about the size of a dinner plate, and the ion propellant line runs through the hole in the center of it. The cryocooler is just out of view, but it’s the same space-qualified model the team trialed in Japan. The next stage of the project will involve moving to a smaller magnet, approximately the size of a bagel, with the goal of making the system more suited to spaceflight.

Hēki Will Test Kōkako’s Tech

Kōkako is one half of the research effort—the ground-based development of a practical AF-MPD thruster. The other half has been on building a technology demonstrator that will soon be mounted onto the exterior of the ISS via a commercial experiment portal called the NanoRacks External Platform. Pavri describes the demonstrator as “a critically important precursor to the Kōkako thruster,” which is why it’s named Hēki, the word for “egg” in the Māori language.

“As I like to say, we took a position on the chicken-egg question,” says Pollock.

On 7 November, Hēki was packed up and shipped to Houston, where it’ll undergo final tests at Voyager Space’s facilities. (Voyager Space is also the company behind the NanoRacks platform.)

A black metal sheet with a piece of art engraved in white linesThe Hēki demo due to arrive on the ISS later this year carries a depiction of the story of how the Kōkako bird got its blue wattle.Laurie Winkless

Hēki is, in effect, everything needed for Kōkako, excluding the ion line. In the center of the baseplate is a steel bagel—lightweight external shielding for the smaller superconducting magnet. When in operation, this magnet will generate a field of up to 0.5 T, “similar in level to what you would see inside an MRI machine but in a very small space,” explains Pavri.

“To our knowledge, this is the most powerful electromagnet that will have ever flown,” Pollock says. “So, it took a lot of design work to meet the very stringent stray magnetic field requirements of the ISS.”

Sitting just above the shield is a flux pump—another new component built at Paihau-Robinson. It acts as an inductive power supply that gradually builds current in the magnet over several hours. Because it also uses superconductors, the flux pump doesn’t heat up, which helps maintain the magnet’s temperature. It too is new to the space environment. The soda-can-size cryocooler and all of the support electronics for the system sit on the underside of the baseplate—a decision motivated by thermal management needs.

Testing the Magnets in Space

When installed on the ISS—which at the time of publication, will most likely be June—the magnet will be operated remotely, cycling through various field strengths, and testing shutdown scenarios. Pavri describes the overall goal as “a demonstration that these new technologies—the high temperature superconducting magnet and flux pump power supply—can survive and operate reliably in the space environment.”

Zenno, a space startup based in Auckland, New Zealand, says it has been testing a superconducting magnet in orbit since 2023. Zenno has not yet published any data on its experiment.

The Paihau-Robinson team also has a secondary objective for the mission; “an experiment of opportunity,” says Pollock, made possible by its high-field magnet. “People have talked since the sixties about using strong magnetic fields for shielding in space. While Hēki is not the ideal setup for measuring it, I was keen to incorporate sensors to see what effect our magnet might have on the radiation environment.” He sourced two sensors from the Czech Technical University in Prague, installing one directly above the magnet, and the other a short distance away within the enclosure. “As we ramp the field up and down, I believe we’ll see an effect.”

The final view of Hēki before it is packed away is its protective cover. The coated sheet of metal includes a list of the team members who worked on the project, and those who funded its development. But it’s the front that’s most eye-catching. Adorned with the work of contemporary Māori artist Reweti Arapere, the imagery tells the story of how the Kōkako bird got its blue wattle.

“When the astronauts pull this out, we want to not leave any doubt about where this instrument has come from,” says Pollock.

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