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Electrical fault delays LHC start-up

Back down the tunnel: technicians will soon be repairing an electrical fault somewhere along the LHC (Courtesy: CERN/Maximilien Brice)

Back down the tunnel: technicians will soon be repairing an electrical fault somewhere along the LHC. (Courtesy: CERN/Maximilien Brice)

By Hamish Johnston

Today I was planning to write a cheerful blog celebrating the first circulating proton beams in the Large Hadron Collider (LHC), but sadly the particle gods are not smiling down on CERN this week. Accelerator physicists in Geneva have identified an electrical fault in one of the collider’s magnet circuits and plans to restart the giant machine this week have been put on hold – possibly for several weeks.

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Bristol marvels at awe-inspiring solar eclipse

 

By Tushna Commissariat and James Dacey

The south-west of England is not exactly known for its sunny skies at this time of year, so many of us in Bristol – home to Physics World HQ – had steeled ourselves to miss out on today’s solar eclipse, which coincidently is on the first day of spring. So, we were rather overjoyed when the Sun shone through the sparse cloud cover for nearly an hour of the celestial treat. While today’s eclipse was technically visible to anyone in North Africa and Europe, totality was only visible to those lucky few who happened to be on the Faroe Islands (where it was actually cloudy for most of the time) and in Svalbard in northern Norway. Here in Bristol, the eclipse peaked at about 9.30 a.m., when 87% of the Sun’s light was blocked by the Moon.

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Partial eclipse, meteorites and northern lights enthral a nation

Spot on: this photograph of the Sun taken during the eclipse clearly shows a sunspot (Courtesy: David Bloomfield)

Spot on: this photograph of the Sun taken during today’s eclipse clearly shows a sunspot. (Courtesy: David Bloomfield)

By Hamish Johnston

Earlier today millions of people in north-western Europe had the opportunity to see a partial eclipse of the Sun – or a total eclipse for the lucky few in northern Norway and the Faroe Islands.  Although it was a bit hazy here in Bristol, we were treated to spectacular views of the Moon covering 87% of the Sun. We have put up a Flickr album of images taken by colleagues here at IOP Publishing including the amazing photo above. It was taken by David Bloomfield and clearly shows a sunspot in the upper-left portion of the Sun.

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Guide to the solar eclipse

Solar eclipse captured by Hinode craft

Solar eclipse of 2012, which darkened parts of the US and south-east Asia. (Courtesy: JAXA/Hinode)

By James Dacey

On Friday, our old friend the Moon will swing by to remind us that she’s not just there to reflect the Sun’s light; she can sometimes block it out too. A total solar eclipse will be visible to those lucky few people living in the Faroe Islands or the Norwegian archipelago of Svalbard. Many others across Europe, North Africa and Russia will be treated to the (almost as good) spectacle of a partial solar eclipse.

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What’s the latest matter with antimatter?

Hangst at the ALPHA experiment at CERN

Mind over antimatter: Jeffrey Hangst at the ALPHA experiment at CERN.

By Tushna Commissariat at CERN

While visiting CERN, the world’s biggest particle-physics laboratory, it’s easy to get swept up by the excitement of the Large Hadron Collider and its detectors, especially in the run up to it being switched back on in the coming weeks. But CERN is also host to a variety of other equally exciting experiments that probe some of the biggest unanswered questions in science, such as the experiments that probe the unwieldy world of antimatter. Indeed, CERN’s antimatter programme has received considerable attention in the past, especially thanks to the now-famous book (and later, film) Angels and Demons, where some antimatter was supposedly stolen from the laboratory and used to build a bomb! Suffice to say, antimatter is of interest to physicists and the public alike and so I caught up with physicist Jeffrey Hangst, who is spokesperson of the Antihydrogen Laser Physics Apparatus (ALPHA) experiment, which I also had the chance to visit.

a view of the ALPHA 2 apparatus

Antimatter factory: a view of the ALPHA 2 set-up.

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Was Bruno Pontecorvo a spy?

Frank Close (centre) speaking at Prospect magazine HQ on 12 March 2015

Reflecting on – Frank Close (centre) discusses the life of the Italian physicist Bruno Pontecorvo, who defected to the Soviet Union in 1950.

By Matin Durrani

Like all good publications, Prospect has a strapline about itself – “the leading magazine of ideas”. Physics World is also about ideas, although sadly our magazine, great though it is, doesn’t have adverts for Cartier watches, Embraer executive jets or the Taj Exotica Resort & Spa in the Maldives as Prospect does. Clearly, some people with ideas have more money to spend than others.

I was kindly invited last week by the deputy editor of Prospect, Jay Elwes, to an event he hosted at the magazine’s headquarters in central London. The event featured the University of Oxford physicist Frank Close, who has just published a new book on the life and times of Bruno Pontecorvo. Close was on hand to discuss the key themes of the book, which is entitled Half Life: the Divided Life of Bruno Pontecorvo. Elwes described the attendees as a “small, high-powered group”, including as it did Pauline Neville Jones, the former chair of the UK’s Joint Intelligence Committee and Jonathan Evans, the former director-general of the British security service MI5.

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Physics mosh pit, stained-glass scientists, opera and dance at CERN and more

 

By Hamish Johnston

Last week Physics World’s Michael Banks was at the APS March Meeting in San Antonio, and at the top of his to-do list was to belt out a few tunes at the event’s regular physics singalong. You can hear him in harmony with a roomful of physicists in a rendition of “(You Got Me) Lasing” in the video above. It is sung by Walter Smith of Haverford College to the tune of Britney Spears’ “(You Drive Me) Crazy” and his performance drives the dance floor into a frenzy of moshing physicists.

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Last views of a huge particle detector before the Large Hadron Collider comes to life

Photograph of the author at the CMS detector at CERN

My photo opportunity: this could be the last we will see of the CMS for three years.

By Tushna Commissariat at CERN

Regular readers of Physics World will know that I am currently visiting the CERN particle physics lab in Geneva, ahead of the restart of the Large Hadron Collider (LHC) in the coming weeks. My first stop yesterday afternoon was a press conference in which CERN’s director-general Rolf Heuer and other leading physicists briefed us about “Run 2” and what researchers are hoping to discover. You can read about what they had to say here: “Large Hadron Collider fires up in a bid to overturn the Standard Model“.

I managed to squeeze in a quick last-minute visit to the Compact Muon Solenoid (CMS) detector before it is sealed up tight for the next three years. My host was CMS communications officer Achintya Rao, who took me and a few others deep underground into the bowels of the CMS – and what a sight it was!

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Pioneering women of physics, why you should become a particle physicist and a BICEP2 scientist on all that dust

Photograph of particle physicist at CERN

Smiley happy people: who would not want to be a particle physicist? (Courtesy: ATLAS)

By Hamish Johnston

Over on the Quantum Diaries blog, Aidan Randle-Conde has put together a lovely photo-essay called “30 reasons why you shouldn’t be a particle physicist”. It is reverse psychology, of course, and the 30 images highlight the benefits of devoting your life to studying sub-atomic particles. As someone who chose to do condensed-matter physics, do I now think that I made a huge mistake? No, but I have shared the thrill and excitement of being at CERN when the Higg’s was discovered and seen the Large Hadron Collider and its detectors up close, so I know where he is coming from.

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Zombie outbreaks in San Antonio

Photograph of a person dressed as a zombie

Where are you going to run to? (Courtesy: iStockphoto/Renphoto)

By Michael Banks in San Antonio, Texas

If you ever find yourself in the unfortunate position of trying to survive a zombie apocalypse in the US, what should you do?

Well, according to Alex Alemi of Cornell University and colleagues, you should head to the Rocky Mountains or the Nevada desert.

Using 2010 US census data for population levels around the country, Alemi and colleagues used statistical mechanics to model how a zombie outbreak would spread.

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