University Of Oxford Alumni

"What I'm going to do is suck out all of the air out of this container and see what happens to marshmallow man, or indeed, what might happen to our pet bunny rabbit in a particle accelerator. ...Oh my gosh it's huge! That's amazing! Sorry, we haven't tested this. I didn't realize it was going to be this good. ...That's probably what would happen to your little bunny rabbit, but in a slightly more horrific fashion."

"So we can't use it as a weapon of mass destruction. This is another one... that someone told me that you shouldn't do with a particle accelerator... [Y]ou shouldn't eat it, which is true."

"If you just put this beam onto a massive block of copper, you could actually melt 600 tons of copper from solid to liquid, just using the Large Hadron Collider beam."

"So there's some really interesting applications of accelerators, way outside of the realm of particle physics, that we're starting to get a handle on."

"So my number two thing you probably shouldn't do with a particle accelerator. You probably shouldn't put your head in the beam... On this one I want to have... a vote... What might kill you first? ...Would your head freeze because of the ? It's at minus 271 degrees Celsius] in some accelerators... take the Large Hadron Collider for example. There the magnets are pretty cold, or would the heat from the beam make your head explode, or would your head explode from the , or would you die from the dose? ...I want a show of hands for which one you think would get you first."

"Now there's another one... that might not have an electric charge... The gold atom, yes. Can anyone suggest a way to get that gold atom into a particle accelerator? ...You can ionize it. Thank you. So to ionize a gold atom you can rip the electrons off or add more electrons on... Give it an electric charge, and then we can put it into a particle accelerator. So that's the kind of particles we need."

"Four different types of particles: electrons, s, s and gold atoms. ...Can anyone suggest which one you can't put in a particle accelerator? ...A . Yep! Do you know why? Because it isn't charged. Thank you very much. ...[I]t doesn't have an ."

"The next thing we want to do with those particles is to give them some energy. That's the basics of how an accelerator works. I've got a machine here called a which does that..."

"Building up charge, actually building up , is the key to giving particles energy in a particle accelerator. ...Now some of the first particle accelerators were actually genuinely using this mechanism of having a belt and some rollers, and building up lots of voltage. They were called Van de Graaff accelerators. They still exist. I've worked on one... If they're the same charge, which get repelled, and there's force there, they're pushed away and they gain some energy... [I]n the case of an accelerator we'll get our particles... going faster and faster and faster toward the speed of light."

"What is a particle accelerator? ...This is the ...the world's biggest particle accelerator. It's 27 kilometers in circumference ...buried about 100 meters underground between the borders of France and Switzerland, near Geneva."

"So it's interesting, even though it seems like a stupid question to say what would happen if you stuck your head in it. It does actually present some interesting real problems in engineering, in actually designing these machines."

"So when we're thinking about radiation and radioactivity, it is worth keeping in mind that just the fact that something is radioactive does not means it's harmful..."

"Radiation effects. ...There's this guy, , who... before the days of such strict health and safety, somehow managed to bypass a safety mechanism on an accelerator, and stick his head in a 76 GeV proton beam. Now that's quite a lot lower than the Large Hadron Collider beam, but the amazing thing is that he just saw a really bright flash, and he didn't feel any pain at all... Most people think, "Well, this beam, it's got lots of energy. It will just destroy you" but actually that's not quite what happened. ...[A]fter it happened his face swelled right up and the skin on that side pealed off, but he didn't die. ...[H]e went on to get his PhD and... he worked as a scientist for many years... [H]e's actally still alive in Russia, living in relative obscurity. ...A journalist interviewed him few years ago and... because the side of his face that the beam irradiated was paralyzed... and he hasn't been able to move the skin on that side of his face for so many years. That side of his face like it was... the day that this accident occurred. When I... read this, I was like, "Miracle cure for aging!" Yea, paralyzed face is probably not a miracle cure..."

"I have a demonstration... which is the simplest particle accelerator I could make.... in a giant salad bowl. ...[W]hen it goes over the charged strip it picks up the same charge and it gets repelled ...then it hits the grounded strip and it dumps all of that charge, but it keeps its momentum, it keeps rolling around ...So every time it goes over one of those four [repelling] strips ....it gets a kick, or gets accelerated and it gains energy again and again. ...In this demonstration, the ball has to change charge, and fundamental particles don't change charge, so in this case my voltage in constant and the ...[ball] changes charge, in a real accelerator we have a constant charged particle, and that means we have to change the voltage."

"[S]ynchrotrons are fascinating machines. The original idea was actually from an Aussie... called Marcus Oliphant and the idea here... instead of them having particles that start in the center and spiral outwards... you keep the particles confined to one , one , and as the particles gain energy you increase the field in the magnets, the magnetic field, in time with the energy gained, in order to keep them going around in the same path."

"That's only one particle accelerator. There are actually over 26,000 of them in the world."

"So we still use a few cyclotrons, but most of the machines that people talk about, especially in the media, are a different type of machine which we call a , and we have two of these types of machines at the Rutherford lab at Harwell. One is the ISIS Neutron Source that I'm associated with, and there's also the ..."

"Physics will always be, at its core, about understanding our place in the Universe..."

"The Standard Model of particle physics classifies all known particles in nature and the forces through which they interact. ...[O]ur current version came about in the 1970s. This theory is an absolute triumph: it is mathematically elegant and unbelievably precise, yet it fits on the side of a mug."

"While a theoretical physicist's ideas must take into account the results of experiments, an experimental physicist has a more nuanced job. She is not simply testing out the ideas of theoretical physicists; she is asking her own questions and designing and physically building equipment she can use to test those ideas. ...[H]er practical knowledge ranges from to chemistry, from to ."

"So you can actually put your head in the beam of an accelerator and survive it. And he's not the only one to have done it."

"I'll tell you very briefly how they work. ...The first thing we need is some ...s, or even atoms themselves perhaps."

"I mean you guys are a rubbish accelerator, but we do that very very precisely. ...So what happens in a synchrotron... is that you have to time that wave very very precisely with the increase in the magnetic field in order to get the particles all synchronized, and that's why we call it a synchrotron."

"I'd just like to leave you with my advice in choosing your career... [F]ind something that makes you sit up and think, "This is really important" or "This is fascinating" or "This is what I'm passionate about" and it can be in any area... Something like space might get you, of climate change... you might really like astronomy, or you might be more passionate about world hunger, injustices in the world, the availability of water, energy, health, aging, anything like that. Think about it, and do something about it. That's all, really, you need to do, and make a career out of doing something about it. Because if you do something that you're passionate about, and you love... You're not even going to feel like you're going to work each day. ...You're just going to feel like you're getting up and you're doing what it is that you're passionate about..."

"[A]... Large Hadron Collider radiofrequency cavity... is one of the devices, and... operates at... superconducting temperature at 400 MHz... [T]his is one of the devices into which we pump a large amount of RF energy, send the particles through and as they go through, as you demonstrated very nicely, they gain a little bit of energy..."

"So that's one example of how a wave can be used to accelerate particles, but... I brought along some scale model protons [large beach balls] and I thought what I'd get you to do is for you guys to be the wave and the scale model protons are going to accelerate across the wave [beach balls moved by audience hand wave]... Eleven-year-olds do this really well, I'm warning you. You've got competition."

"Now it's not obvious to most people how this acceleration mechanism of using a wave to accelerate particles actually works. So I have a little demonstration... of an everyday example where I can use a wave to accelerate some particles. This is just an ordinary fluorescent tube that you have in the ceiling... Over here I have a plasma ball which has a 30 kHz oscillating AC voltage supply. So there's a voltage, it's a couple of kilovolts that's going up and down, up and down, up and down in the center of that thing, 30,000 times a second. And because of that, out of the plasma ball... comes an electromagnetic wave that's traveling... through space. So move towards the plasma ball and point the fluorescent tube toward the plasma ball. [It lights up] ...So actually if you move it away, notice that it's still on. Now a lot of people show this demonstration with the fluorescent tube touching the plasma ball and say that it's something about completing a circuit... It's not. It's the electromagnetic wave that's coming out... which is traveling through the fluorescent tube, exciting the electrons inside. ...you know how a fluorescent tube works."

"So my name's Suzie. I'm a physicist... an accelerator physicist, and I work at the University of Oxford. I run a research group there in... high intensity s... I... spend half my time at Harwell campus... I'm also a member of the , not the other ISIS, just to be clear."

"Try something for me. ...Hold [the tube] halfway down. [Half of the lamp goes out] ...You're grounding any of the electrons which are... moving inside there..."

"If you look at a real one... the ISIS synchrotron. There are 10 sections that look almost identical... and you have these big yellow magnets... They're... s. They bend the beam around, and then there's two other main components. There are ... and... a radiofrequency cavity. Now this is basically a big box like your microwave, into which we pump electromagnetic waves, and this sets up a inside there, and you have to time the voltage of that standing wave with the passage of the particles in order to get them to accelerate."

"In the churchyard she was set down while her male relations dug into the ground. A smell rose, of loam and of rain. Yetemegnu was brought to the front. Now she could see the priest who clambered into the shallow grave; see his censer swinging, one corner, another, another, overlaying earth with pious perfume. Hear the final prayers. Watch the bending backs lower their freight into the ground, head to the east, feet to the west, feel, like a blow to her own body, the first handful of soil land upon her mother."

"In the middle of war, Edemariam remembers soldiers so spooked that they fire rounds of machine-gun bullets into the heart of a tornado. Her grandmother shoves her and her cousin into the wardrobe. They sat crouched "among soft white dresses that smelled of incense and woodsmoke and limes"; her grandmother stood outside, sheltering them from all that passed. It is one startling, unforgettable story among an abundance of riches."

"Later sections... describe the gargantuan instruments that enabled scientists to detect... elusive particles at the heart of the standard model... as the and... Higgs boson. Through each tale, The Matter of Everything explores how the pursuit of basic science has led to unexpected discoveries... These findings now underpin cancer treatments, personal electronics, and... how scientists investigate the way lava flows deep below Earth’s surface. Sheehy carefully considers each of these breakthroughs through the lens of the people who defied the odds to uncover the mysteries of our universe."

"[I]f you take Einstein's equation E=mc2, E is energy, m is the mass and c is 299,792,458 meters per second, so that squared, I'd have to get to tell me what that is, but that's a very big number. So it takes an enormous amount of energy to create even a tiny tiny amount of matter. So that's why, over the years, our machines have gotten bigger and bigger and bigger, and reached up to higher and higher energies in order to create particles of higher and higher masses. Now that might seem slightly counterintuitive, but if we look down at the low energy scale, we get our... everyday objects, and in fact up here at sort of 10 MeV, which is like a sort of everyday energy scale, are the up and s where our s and s are created from. And if we go up in energy scale, we slowly... over time discovered all these other types of s and s, and all these other things that seem to play no role in our everyday lives."

"Beginning with the discovery of s, Sheehy... continues... through a series of experiments that led to the discoveries of the electron (1897), atomic nucleus (1911), and measurement of the (1923). By the end of the first third of the book the theory that the atom is the smallest piece of matter is in tatters and the remaining chapters of the book describe the fascinating experiments physicists designed to better understand the particles that make up an atom."

"[I]nside the atom there are only... three different types of particles, which are the up and s, they're the constituents of s and s inside the atom, and the electron. Everything else there plays very little role in our day-to-day lives. But over about the last century we've discovered that all of these particles fit together in a neat theory that describes our universe to something like 9 or 10 decimal places. It is an incredible amount of discovery and work that's gone into it, and I cannot do it justice in... two minutes. But the latest piece that we've discovered using the Large Hadron Collider, and one of the reasons, but not the only reason that it was built, was to discover... the Higgs boson."

"This is actually a real one. ...This is ...the smallest radiofrequency accelerating cavity in the world... This one is from a project called the which is one idea of the next generation of colliders to reach even more precise measurements in particle physics, and the inside of this thing is machined to a sub-micron precision... [T]here's a hole at the end. ...This one's for electrons, which are a very small beam, so it can be very small hole, and they travel through there. ...These are the RF ports. These are the vacuum ports. ...[T]his thing would give an electron an energy gain of ...probably 10 million electron volts. This is also a very very high gradient cavity so it gives a lot of energy in a very small space. ...The higher the frequency the smaller they get. ...That one operates at 30 GHz. It was actually so small and the machining tolerances were so tight that they've actually decided to go for 12 GHz instead... because it makes the engineering slightly easier."

"Over the last century the experiments... have gone from single-room setups led by one person to the largest machines on Earth. The era of "Big Science," which began in the 1950s... now... involve collaborations of over a hundred countries and tens of thousands of scientists. ...[N]o individual country can achieve these feats alone."

"What has stayed constant is a certain chippiness. Canadians feel both superior to and dependent on America, thus resenting it; they often get mistaken for Americans, and are afraid of being culturally subsumed. They feel the rest of the world ignores them, which is a pretty accurate perception. And they're always trying to define who they are (not American, not British, not boring) and not quite succeeding, being presented with the daunting challenge of a country that covers five-and-a-half time zones, speaks two languages and contains a province that periodically wishes to secede (and if it did so would set the four Atlantic provinces adrift)."

"It has been said of him that he was the only brilliant eldest son produced by the British Peerage for a hundred years. This is an exaggeration, but there can be no doubt as to the exceptional character of his abilities, and as to the brilliancy of the promise with which his friends regarded him."

"When in office his application was indefatigable; nor was he insensible to the dignity of power. But he did not love politics for their own sake; and when he took office, did so rather from an over-ruling sense of duty than from any liking for his task. But he never neglected business; and the quickness of his parts enabled him to master details in a much shorter space of time than would have been required by ordinary men. His heart, however, was not upon the Treasury Bench; nor had he any taste for those strategical manœuvres which are as necessary in politics as in war. The soul of honour himself, he was incapable of suspecting either falsehood or trickery in others, and was, perhaps, a little impatient of the precautions which are necessary to counteract them."

"A little hesitation at the beginning of a speech is graceful; and many eminent speakers have practised it merely in order to give the appearance of unpremeditated reply to prepared speeches; Stanley speaks like a man who never knew what fear, or even modesty, was."

"[B]esides the Irish Coercion Bill, which he had carried by the force of his eloquence, he had to conduct through Parliament and defend, clause by clause, the Irish Church Temporalities Bill, and the Colonial Slavery Abolition Bill, two of the largest and most important measures that were ever proposed for the consideration of Parliament. He performed these tasks with infinite skill, readiness, and ability; and for my part I felt and expressed to my friend the Duke of Richmond, the opinion which I firmly entertained, that whenever Lord Althorp should retire, or, by his father's death, be removed to the House of Lords, Mr. Stanley would be fully qualified to assume his place as leader of the Liberal party in the House of Commons."

"[Lord Derby at Eton had] an iron will and unbounded self-confidence."

"Derby's personality was full of charm. He was handsome in person, with striking aquiline features; in manner he was somewhat familiar and off-hand, but beneath this facility lay an aloofness from all but social equals and intimates which stood considerably in his way as a party leader."

"Derby's reputation as a statesman suffers from the fact that he changed front so often. A whig, a Canningite, a strenuous whig leader, a strenuous conservative leader, the head of the protectionists, the opponent of democracy, and the author of the change which upset his own policy of 1832 and committed power to democracy in 1867, all these parts he filled in turn. He was not a statesman of profoundly settled convictions or of widely constructive views. He was a man rather of intense vitality than of great intellect, a brilliant combatant rather than a cautious or philosophic statesman. The work with which he was most identified, the re-creation of the conservative party after its disintegration on the fall of Peel, was Disraeli's rather than his own; and the charge of a timid reluctance to assume the responsibilities and toil of office is one that may fairly be made against him."

"Lord Derby had no very consistent or thoroughgoing theory of politics, that he never gave himself the trouble to make one, that he would not improbably have been hampered and irked by one if he had had it."

"The magnanimity of the emancipator of the slaves, the liberalism of the supporter of the Reform Bill, the generous sentiments actuating the advocate for the removal of disabilities from both Catholics and Dissenters, still, judging from the obvious policy of his cabinet, remain vital in the nature of the leader of the Derby government. His antagonists in discussion still find, no less, that there, in the midst of his varied oratorical powers, lurks yet the sting of sarcasm which extorted from O'Connell the designation of "Scorpion Stanley,"—an epithet, coming from the outspoken lips of Dan, complimentary rather than the reverse, remembering those other charming flowers of rhetoric flung about him with such lavish prodigality and such refined taste by the Liberator; such as "the base, bloody, and brutal Whigs," or, as "old buccaneering Wellington!""

"I think that Stanley, though brought up to think nominal Toryism pigheaded and foolish, was always a Tory at heart, and that the consequences of the Reform Bill made him, though he would not for a long time acknowledge it, a Tory in fact, on all, or almost all, points. But, in the first place, he had a mind very much averse from the metaphysics of politics, as, indeed, of all things, and never cared or dared to argue questions back to their first principles."

"Lord Malmesbury told me that Stanley, "who never pays compliments, you know, that's not his way," said it [Disraeli's speech] was one of the best things that was ever done."