Posts by: Margaret Harris

Grabbing a slice of the pie in the sky

(Courtesy: NASA)

(Courtesy: NASA)

By Margaret Harris at the European Planetary Science Congress in Riga, Latvia

If you wanted to mine an asteroid, what would you need? Right now, it’s a hypothetical question: only a handful of spacecraft have ever visited an asteroid, and fewer still have studied one in detail. As commercial ventures go, it’s not exactly a sure thing. But put that aside for a moment. If you wanted to create an asteroid-mining industry from scratch, how would you do it?

Well, for starters, you’d need to know which asteroids to target. “Not every mountain is a gold mine, and that’s true for asteroids too,” astrophysicist Martin Elvis told audience members at the European Planetary Science Congress (EPSC) yesterday. For every platinum-rich asteroid sending dollar signs into investors’ eyes, Elvis explained there are perhaps 100 commercially useless chunks of carbon whizzing around out there, and the odds for water-rich asteroids aren’t much better. Moreover, some of those valuable asteroids will be impractical to mine, either because of their speed and location or because they’re too small to give a good return on investment. “Smaller asteroids aren’t even worth a billion dollars,” Elvis scoffed. “Who’d get out of bed for that?”

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A temporary lack of neutrons

Photo of the instrument hall

The guide hall at the HANARO research reactor in Daejeon, Republic of Korea.

By Margaret Harris in Daejeon, Republic of Korea

For almost three years, the HANARO research reactor has been idle. Built in 1995 as a hub for neutron-scattering experiments, radioisotope production and other scientific work, HANARO (High Flux Advanced Neutron Application Reactor) is the only facility of its kind in the Republic of Korea, and it underwent a major upgrade in 2009. Then, in 2014, the facility became a delayed casualty of the meltdown at Japan’s Fukushima Dai-Ichi nuclear power station, as enhanced regulatory scrutiny led to the discovery that the reactor hall’s outer wall was not up to the latest standards. An enforced shutdown followed while the wall was reinforced, and although the works were supposed to take just 18 months, opposition from local citizens’ groups has led to further delays.

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A spotlight on accelerators in industry – sort of

Robert Kephart of Fermilab speaking about the "beam business" at IPAC17.

Robert Kephart of Fermilab speaking about the “beam business” at IPAC17.

By Margaret Harris at the International Particle Accelerator Conference in Copenhagen

Normally, you’d expect a particle-accelerator conference to focus on research – either the fundamental research done at accelerator facilities around the world, or the applied research required to get such facilities up and running in the first place. And for the most part, that has been absolutely true of the 8th International Particle Accelerator Conference (IPAC), which is taking place this week on the outskirts of Copenhagen, Denmark.

On Tuesday, however, the conference organizers dedicated a session to the ways that accelerator science engages with industry. In a two-hour series of talks, audience members heard from speakers as varied as Bjerne Clausen, CEO of the Danish chemical technologies firm Haldor Topsoe; Bob Kephart, director of the Fermilab-affiliated Illinois Accelerator Research Center (IARC); and Giovanni Anelli, who leads the Knowledge Transfer group at CERN.

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New cosmic messengers, and what they can tell us

Bartos-multimessenger-astronomyBy Margaret Harris

Immediately after last year’s announcement that the Laser Interferometer Gravitational-Wave Observatory (LIGO) had seen its first gravitational waves, a lot of the discussion centred on what the discovery meant for general relativity.  This was understandable: getting further confirmation of Einstein’s century-old theory was (and is) a big deal.  But in the longer term, and as the LIGO detectors notch up a few more observations (they’re currently crunching data on six new candidates), the emphasis will shift away from the waves themselves, and towards what they can tell us about the universe.

The key thing to realize here is that gravitational waves are fundamentally different from other, better-studied cosmic “messengers” that travel to Earth from distant reaches of the universe.  Unlike photons, gravitational waves are not impeded by clouds of gas or dust; unlike cosmic rays, they are not deflected by electromagnetic fields. In addition, some of the most dramatic astrophysical events, such as the merger of two black holes in empty space, are “dark” or “silent” to other messengers: these events produce gravitational waves in copious quantities, but not, as far as we know, anything else.

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Following the ups and downs of nuclear energy

PWFocus-Nuclear17-cover-200By Margaret Harris

If you’re finding the pace of geopolitical news a bit too rapid at the moment, spare a thought for physicists and engineers working in the nuclear energy sector.

Towards the end of last month, the venerable energy firm Westinghouse Electric issued a press release in which it proudly announced that its AP1000 reactor – a relatively new “passively safe” design in which the reactor core is kept cool without the need for powered pumps or other “active” equipment – had passed a major UK regulatory review. Ordinarily, this would be cause for celebration. The so-called “Generic Design Assessment” process takes years, and completing it helps pave the way for building AP1000s within the UK. An international partnership called NuGen has long hoped to do just that, on a site near Sellafield in north-west England, so in normal times, you might expect it to be celebrating, too.

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Your future with physics

PWCareers17-cover-500By Margaret Harris

In a typical month, the careers section of Physics World features the stories of two different physicists: one who is working in a physics-related field (such as engineering or teaching), and another who decided to do something totally different (such as designing sailboats or running a winery).

I find these stories endlessly fascinating, and when I was Physics World’s careers editor, I loved sharing them with the wider physics community. But the section isn’t there just to add human interest. It’s also giving current students (and later-career physicists seeking a change) a better idea of what they could do with their physics knowledge in the workplace.

After talking to students and careers professionals, I realized that publishing two stories in the magazine once a month wasn’t really the ideal way of doing this – at least, not for readers who are actively looking for careers ideas, and who might therefore prefer to learn about lots of different options at once.

So with these readers in mind, we’ve come up with a brand-new publication for 2017. The first edition of Physics World Careers contains a selection of the best articles published in the magazine’s careers section last year, plus an extensive employer directory.

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US immigration and trade policies provoke debate at Photonics West

Photo of the Golden Gate Bridge against a clear blue sky

San Francisco’s Golden Gate Bridge welcomes scientific visitors to Photonics West – except for those banned from travelling to the US.

By Margaret Harris at Photonics West in San Francisco

“I’m an immigrant. I stole one American job. I helped create hundreds of thousands of others.”

Deepak Kamra’s words caused a stir among listeners at Photonics West, the massive industry trade show and scientific conference that descends on San Francisco, California each winter. Speaking at a panel discussion on “Brexit, US Policy, EU and China,” the Delhi-born veteran of the Silicon Valley venture capital scene said that he expected the new US administration – which recently imposed a travel ban on visitors from seven majority-Muslim countries – to target Asian and South Asian technology workers next. Restrictions on the number of foreign-born students studying science, technology, engineering or mathematics (STEM) at US universities could follow. Ultimately, Kamra concluded, “We are going to lose a lot of qualified people.”

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To the stars, through adversity

pwastro16-cover-500By Margaret Harris

Space is, famously, “the final frontier”. It is also – almost as famously – “hard”. We saw this most recently in October, when the Schiaparelli lander crashed onto the surface of Mars, but throughout humanity’s nearly 60-year history as a spacefaring species, our hopes of exploring and observing the cosmos have repeatedly come up against the stiff challenge of building vessels that can survive the journey. Arguably, no other industry on Earth (or indeed off it) has rejoiced in such high “highs”, or agonized through such low “lows”.

That mix of heady dreams and harsh realities is one reason why the latest Physics World focus issue on astronomy and space science carries the tag line “To the stars, through adversity” (I’ll come to the other reason at the end of this blog post). The articles in the issue – which you can read free of charge – pay tribute to the ingenuity of the scientists and engineers involved in the challenging and rewarding practical work of exploring and observing the cosmos. Here, you can learn about the latest advances in astronomical instrumentation, get up to speed with future space missions, and familiarize yourself with recent developments in the entrepreneurial “new space” industry.

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My first experience of peer review

(Courtesy: Shutterstock/Lorelyn Medina)

(Courtesy: Shutterstock/Lorelyn Medina)

By Margaret Harris

My first experience of being peer reviewed did not begin well. Here’s the opening of the referee’s report:

“The purpose of publication is to disseminate knowledge to other people who may be able to use it. Since the model dramatically fails the authors’ own experimental tests more than half of the time, I can’t imagine anyone wanting to use it. I therefore recommend against its acceptance, here or anywhere else.”

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When a water slide goes wrong

By Margaret Harris

A couple of years ago, I came across what I thought was a funny (and physics-related) video about a water slide. The slide is called “Verrückt”, which my German-speaking colleagues translate as “mad” or “crazy”, and it caught my attention because it was being built at an amusement park in my home town of Kansas City. As the video shows, the slide experienced a few problems during its testing phase.

“When the rafts are loaded with more than 1000 pounds, the slide becomes unsafe,” says the video’s announcer as the test raft goes airborne. “We’re going to have to redesign the entire slide,” an unnamed official adds.

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