Revolutionary Small Magnet Matches Strength of Large Magnets for the First Time

Even Small Magnets Can Be Extremely Powerful

ResonX/Jasmin Schoenzart

In a groundbreaking development, researchers have designed a magnet small enough to fit in your palm that rivals the strength of the world’s most powerful magnets.

High-performance magnets are crucial in various scientific fields, being utilized in applications ranging from MRI machines and particle accelerators to advanced nuclear fusion research. The strongest magnets available typically use superconductors, which are materials that conduct electricity nearly without loss.

However, most superconducting magnets are sizable. Often, their smaller counterparts share similar dimensions with traditional superconductors. Take for instance Star Wars‘ R2D2; at its largest, it resembles a two-story structure. According to Dr. Alexander Burns from ETH Zurich, Switzerland, his team has engineered a superconducting magnet capable of matching the strength of larger counterparts, yet it’s only 3.1 millimeters in diameter. They achieved this by coiling a thin tape made of a ceramic known as REBCO, which becomes superconducting at cryogenic temperatures, generating a magnetic field when current flows through the coils.

Dr. Burns stated that the team procured REBCO tape from a commercial source, embarking on a rigorous exploration to determine the optimal magnet design, which involved creating and testing over 150 prototypes. “We adopted a ‘fail fast, fail often’ approach in our strategy,” he noted.

Design and Strength Comparison

Eventually, they refined a design using two or four pancake-shaped coils, achieving magnetic field strengths of 38 Tesla and 42 Tesla, respectively. To provide context, conventional refrigerator magnets typically generate fields less than 0.01 Tesla. The most powerful magnets currently in existence generate field strengths of around 45 Tesla, each weighing several tons and consuming up to 30 megawatts of power. In contrast, Burns and his team’s magnet is hand-sized and operates on less than 1 watt.

The ultimate goal for this groundbreaking technology is to enhance nuclear magnetic resonance (NMR), a technique that utilizes magnetic fields to unveil molecular structures, including those of drugs and industrial catalysts. This technology has long been hindered by the large size and cost of traditional magnets, but the research team intends to democratize access to such advanced tools for chemists. Ongoing tests are being conducted to integrate the magnet into NMR setups.

“Historically, achieving magnetic fields exceeding 40 Tesla necessitated massive and costly facilities, making it crucial to utilize superconducting tape to attain similar strengths in a compact device,” stated Dr. Mark Ainslie from King’s College London. “This innovation indicates that ultra-high-field magnets may soon be accessible to a broader range of laboratories.”

Despite these advancements, several challenges remain before widespread adoption. Questions concerning how to maintain uniform magnetic fields and manage the electromagnetic behavior of the coils must be addressed.

Topics:

Source: www.newscientist.com

Review of TopSpin 2K25: Dive into the World of Tennis with this Immersive Simulation Game for Games, Sets, and Matches

TEnnis is one of those sports that only intermittently works well through video games. The odd major series like Pete Sampras, Virtua Tennis, and Smash Court come along, but more often than not we end up relying on old favorites (Take a Bow, Super Tennis). It's been 13 years since TopSpin 4 was released, and the title is considered to be an authentic simulation of the sport that people love. Still looking for a copy until today. But perhaps not anymore. 2K Games has finally produced a sequel. This is a true champion contender.

From the get-go, TopSpin 2K25 has all the details you'd expect from a modern licensed sports sim. All major stadiums and championships are here. However, the playing environment is only well-detailed and not the spectacular theater of photorealism you've come to expect from EA Sports. The opening roster features 25 star players, from Emma Laducane to Andre Agassi. The selection isn't huge, and the quality of the caricatures varies, but it's good enough, and 2K says they plan to add more in the future.

If you don't want to cosplay as Carlos Alcaraz, you can join the full career mode as your own player. Mine is shockingly adorned with his pink Lycra and neon yellow sunglasses, a look that looks like it could easily carry over into real life. There are exhibition matches that you can easily knock out against the AI ​​or up to three friends (online or split screen), and you can also participate in ranked and friendly online tournaments. Your appearance and skillset are fully customizable with a variety of outfits earned through play or (a feature that now seems inevitable) by purchasing a season pass or browsing the store. is. It's great that you can also choose to build a player with a prosthetic leg.

Of course, what really matters is the experience on the court, and that's great. The control system is complex but easy to access, with joypad buttons giving you access to flat, slice, lob, topspin and drop shot options, with power controlled by how long you hold the button down. As with TopSpin 4, timing and positioning are important skills. This is not a Mario Tennis style hit and hope game. If you take your shot too early or too late, your shot will end up in the net, flying off into the top of the stands, or giving another player an easy smash. At the same time, you're always thinking about where your players are on the court relative to the shot you're about to make and the likely return from your opponent. The physical nature of very good players makes the decision-making process even more demanding. It reproduces the weight position and body momentum with delicate precision. Are you so proud of that rushing cross-court slice shot you just landed? Good luck getting back to baseline for Serena Williams' comeback.

For players used to the more visceral feel of Virtua Tennis or the generous forbearance of Mario Tennis, there's a tough learning curve ahead. This is highlighted by the presence of his TopSpin Academy, an in-depth instructional mode that steadily teaches players from basic ground strokes to advanced serve tactics and individual player techniques. Just learning the timing will require several hours of play. If you're just playing the odd knockabout with your friends, there's no need to stress too much, but if you want to progress through Career His mode or play against human opponents online, give yourself a “good” shot. It would be better to hit it. “Perfect” timing at least 75% of the time.

But this is a good thing. 2K Games has created a game that feels like a proper simulation in terms of the array of tactical options available at any given moment and the demands placed on the player's skill. By completing TopSpin Academy, I learned a lot about real tennis strategy and how professional players differ in the way they use their baseline and net plays. There's also plenty of room to grow as a player by experimenting with power shots, perfecting tricky drop shots, and redistributing player attribute points to support different tactical approaches. it is clear.

Thirteen years is a long time to wait for a new tennis sim, but TopSpin 2K25 is well worth it. If there's one thing this game teaches you, it's the value of determined patience.Well, and you can Looks great with pink Lycra and yellow sunglasses.

Skip past newsletter promotions

TopSpin 2K25 will be available on April 25th. £49.99 – £64.99

Source: www.theguardian.com