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Tag archives: fusion

Candy corn in space, compact fusion reactors and physics in Palestine

 

By Hamish Johnston

Besides the great views of the Earth, one of the best things about being on the International Space Station (ISS) must be messing around in near-zero gravity. In the above video on Science Friday the American astronaut Don Pettit describes an “experiment” that he did on the ISS using candy corn, which are kernel-like sweets. He begins with a blob of floating water into which he inserts the candy corn pointy-end first. The points are hydrophilic so they tend to stay in the water, and eventually Pettit has a sphere of candy corn packed around the water. The flat ends of the candy corn have been soaked in oil to make them hydrophobic so the candy corn layer acts like a detergent film or one half of a cell membrane. It’s a fun video and I wonder how he got the idea in the first place?

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Ice cream that changes colour, tag-team parenting and the ITER director-general hits back

Shades of pink: the Xamaleón ice cream in action. (Courtesy: IceXperience)

Shades of pink: the Xamaleón ice cream in action. (Courtesy: IceXperience)

By Hamish Johnston

It has been a cracker of a summer here in south-west England, with lots of sunshine and temperatures in the mid-twenties just about every day. Not surprisingly, I have been eating my fair share of ice cream, but unlike this concoction whipped up by a physicist-turned-chef in Spain, the stuff you get in Bristol does not change colour when you lick it!

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Bananaman, fusion boy, an astronaut and more

By James Dacey

The Red Folder is bulging this week with some weird and wonderful physics stories from around the Web. Here is a round-up of some of the best we have stumbled across.

One of the more eye-catching articles this week included the surreal image of Stephen Hawking posing for a picture with a bunch of men all dressed as Bananaman. In case you’re not familiar with this brilliant character, Bananaman is a comedy super hero created in the 1980s by British cartoonists who valued the importance of nutrition. When Eric Wimp – an ordinary British schoolboy – eats a banana he turns into our hero, a fully grown man in a blue and yellow suit with special powers to rival both Batman and Superman. Anyway, I digress. According to the Telegraph, the 10 besuited chaps in question were on a stag do in Cambridge. They were lost (perhaps a few too many banana liqueurs?) when they turned a corner and spotted the world-famous cosmologist getting out of a car. The result was a group shot with far more a-peel than any of those self-indulgent Oscars selfies that have been doing the rounds this week. Please accept my apologies for that bad pun.

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Physics World 2013 Focus on Vacuum Technology is out now

Physics World 2013 Focus Issue on Vacuum Technology

Physics World 2013 Focus on Vacuum Technology.

By Matin Durrani

What would happen if the global positioning system (GPS) were suddenly to stop working or be switched off? A lot more than a few wrong turns during a car journey, that’s for sure.

With so much technology relying on GPS, which is owned and operated by the US, it’s vital that alternative global satellite-navigation systems enter service. Thankfully, Europe’s Galileo system, currently in production in the UK, will be fully operational by the end of the decade. It will also be more accurate than GPS, which could lead to a host of novel applications.

But what’s interesting for physicists is that Galileo would not be possible without advanced vacuum engineering and testing – as you can find out in our new focus issue of Physics World on vacuum technology.

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A factor of two

conference image

Worrying signs at the National Ignition Facility.

By Michael Banks in Boston

“A factor of two is not a small thing, it is quite a challenge,” says Robert McCory from the University of Rochester in New York.

McCory was speaking about the latest in laser-based fusion research (known as inertial confinement fusion) at the 2013 AAAS conference.

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A trip to MIT

By Michael Banks in Boston

Alcator C-Mod

Alcator C-Mod at MIT.

It may have been the prospect of free pizza that led me to hop on a bus heading to the Massachusetts Institute of Technology (MIT).

But apart from a free lunch, we were also promised a tour of MIT’s fusion facilities, which are based at institute’s Plasma Science and Fusion Center (PSFC).

So after a few slices of pepperoni pizza, we donned the hard hats and moved on to the tour, which included a look at MIT’s main experimental fusion facility – the Alcator C-Mod fusion tokamak.

Operating since 1991 and with a budget of around $25m per year, Alcator C-Mod is a magnetic-confinement fusion device. It heats up a plasma of deuterium and tritium atoms to millions of degrees kelvin, which causes the hydrogen isotopes to fuse and release energy.

However, Alcator C-Mod faces an uncertain future. Last year Congress slated the facility for closure after increasing the budget for the ITER fusion reactor in France. Given no increase in the Department of Energy’s budget for fusion – standing at around $450m per year – the cut had to then come from the domestic fusion programme.

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