“Quantum Objects”: Physics-inspired art by Julian Voss-Andreae

November 30, 2009 | 5:46 am

Quantum Man II, 2007 by Julian Voss-Andeae. Image courtesy of ASCI.

Quantum Man II, 2007 by Julian Voss-Andeae. Image courtesy of ASCI.

Louis de Broglie theorized in 1923 that anything with mass, from electrons and protons to Volkswagsons and people, also has a wavelength. If we created just the right circumstances and had eons of time, we could theoretically create a beam of people that behaved like a wave.

While that experiment isn’t likely to take place anytime soon, Julian Voss-Andreae found another way to turn a man into a wave. His sculpture Quantum Man II consists of a series of steel sheets which form the image of a human when viewed from one angle, but nearly disappear when viewed from another. Like the diffraction pattern of a wave, the front of the plates is clearly visible, but the sculpture seems to disappear and reappear as you move past it. The sheets are equally separated by about 3/4 inch, a bit larger than the actual human de Broglie wavelength of about 10-38 m. The sculpture is stunning in both its aesthetic value and its ability to capture in stillness a concept that is often difficult to explain with words.

Voss-Andreae says he was always interested in art, particularly in painting. It was after that phase, in his late teens, that he says he became fascinated with “the weirdness of quantum physics,” and wanted to “see how far I could get in trying to understand it.” He got so far as pursuing physics graduate work at universities in Berlin, Edinburgh, and Vienna, enough time to give him a good grasp of complex quantum concepts. But he eventually found his way back to art, though this time with a totally different world view. He moved to Portland in 2000, graduated from art school four years later, and has since dedicated himself to creating works of art that are deeply influenced by science. While many artists do take a cue from science from time to time, Voss-Andreae’s work thus far is exclusively science based.

Through the New York based Art and Science Collaborations, Inc. (ASCI), Voss-Andreae met Sarah Tanguy, the guest curator for the American Center for Physics. Tanguy wanted have Voss-Andreae do a show at ACP, but Voss-Andreae said he wanted to create all new pieces. On Monday, November 16, his collection titled Quantum Objects premiered at the ACP, and it is now open to the public. A small version of Quantum Man appeared beside 14 other physics-inspired works. You can see all of them, and an archive of Voss-Andreae’s other work at his website.

“The term ‘Quantum Object”’ although regularly used in physics, is really an oxymoron,” writes Voss-Andreae in his description of the collection. “An ‘object’ is something that lives completely in the paradigm of classical physics.”

It’s a subtlety that only a physicist could point out, and only an artist could take advantage of. Things that exist in the quantum world do not exist as classical objects–it is partly this distinction that makes them quantum. For example, an electron orbiting the nucleus of an atom does not take one distinct path, but all possible paths, until we measure it. But we still try to create representations of an electron circling around a nucleus–first as a little round ball taking a very clear cut path, and then later adapting that image to look more like a cloud surrounding the nucleus. There are many classical representations of the quantum world used by physicists like the path of an electron, or just the idea of point particles as little round balls. Even so, these images are inconsistent throughout physics literature because people are constantly trying to alter them slightly so that they will better capture the quantum essence.

Faced with the challenge of turning quantum objects into classical ones, Voss-Andreae is presented with two opportunities. One is to simply make standard classical representations of quantum objects more aesthetically pleasing. He certainly does this, and does it exceptionally well, but this is something that a dedicated text book could also tackle. The second opportunity he is presented with, one that requires a background in physics, is to infuse the classical representations of quantum objects with some philosophical interpretation. While the pieces of Spin Family use the particles-as-little-balls idea, he also takes the notion of a “family” of particle further, equating a particle’s spin with gender. His piece “Night Path,” interprets Richard Feynman’s technique to measure all possible paths that a particle could take by “slicing up” segments of space-time and creating all possible paths. The result is a stunning work of art in which a divided up black box holds taut gold threat that collectively trace a curved path. Voss-Andreae says the path “connects the idea of the quantum mechanical path to the image of a meteor, a rock falling through the dark of the night, often believed to be connected to a meaningful event.”

The additional challenge for Voss-Andreae is creating classical interpretations of quantum objects where there are few or none previously established. What object represents symmetry breaking? This phenomenon begins with a system suddenly being presented with multiple possible paths, or multiple energy minima. So Voss-Andreae uses hanging chains to represent a graph of those energy minimums. Some look the way we expect–a chain hanging down in a ‘U’ shape–while other possible paths look more and more as if they are defying gravity. When the system choses a path, symmetry is broken, and it may produce an equally counter-intuitive result.

Concepts like symmetry breaking and the de Broglie wavelength aren’t part of non-science vernacular, but Voss-Andreae says he wants the general public to enjoy the works. He wrote in an email message, “What I want is to increase the audience’s capacity to intuit the deeper nature of reality by sensually experiencing the works.” However, Voss-Andreae says when he began the project he had physicists in mind, and wanted to create something “that they could relate to.” It is perhaps more common for artists tackling science to have the goal of making the science more digestible for the general public; not many art projects are offered up mainly for the enjoyment of physicists. Could such a project not only entertain them, but give them something new to think about?

Voss-Andreae says that one key benefit of making art about science is that it requires taking a step back to look at the larger picture. Voss-Andreae’s own career change and subsequent change in perspective made him look differently on science’s attempt to always break down the natural world into smaller pieces, and draw conclusions without looking at the larger picture. He uses nutrition as an example.

“We know quite a bit about single molecules such as vitamins and how their lack affects our health,” he said. “Extrapolating from that though, we tend to believe that a diet consisting of burgers and fries is OK as long as we have our vitamin pills with it. But…nutrition is a concert of thousands of molecules together.”

In relation to physics, he says his work has drawn him back to the philosophical implications of quantum mechanics, discussed by physicists like Bohr and Einstein, and many of which are still open ended.

“It is easy as a physicist to essentially…[believe] that we don’t really have a problem with quantum mechanics because it is such a fabulous tool to predict the outcome of all experiments we have designed,” said Voss-Andreae. “It is wise to step back every now and then, re-connect the dots and keep the bigger picture in mind.”

Voss-Andreae’s work has leaned more and more toward biology in recent years, and he says he feels himself pulled in that direction. While the study of the human body is a whole new realm for him, he is fascinated in particular with the structure of proteins, which led him to create his largest piece called Angel of the West, depicting the molecular structure of the human antibody.

“Quantum Sculptures with Julian Voss-Andreae”, Oregon Art Beat (Oregon Public Broadcasting TV, December 18, 2008)

The collection “Quantum Objects,” is open to the public at the American Center for Physics.

Calla Cofield

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The Large Hadron Collider sets new world record

November 30, 2009 | 3:29 am

CERN just issued a press release announcing that the Large Hadron Collider is now the world’s highest energy particle accelerator. Over the weekend the LHC accelerated beams of protons to an energy of 1.18 TeV, breaking the previous world record of 0.98 TeV that had been held by Fermilab since 2001.

Text of CERN press release:

LHC sets new world record

Geneva, 30 November 2009. CERN’s Large Hadron Collider has today become the world’s highest energy particle accelerator, having accelerated its twin beams of protons to an energy of 1.18 TeV in the early hours of the morning. This exceeds the previous world record of 0.98 TeV, which had been held by the US Fermi National Accelerator Laboratory’s Tevatron collider since 2001. It marks another important milestone on the road to first physics at the LHC in 2010.

“We are still coming to terms with just how smoothly the LHC commissioning is going,” said CERN Director General Rolf Heuer. “It is fantastic. However, we are continuing to take it step by step, and there is still a lot to do before we start physics in 2010. I’m keeping my champagne on ice until then.”

These developments come just 10 days after the LHC restart, demonstrating the excellent performance of the machine. First beams were injected into the LHC on Friday 20 November. Over the following days, the machine’s operators circulated beams around the ring alternately in one direction and then the other at the injection energy of 450 GeV, gradually increasing the beam lifetime to around 10 hours. On Monday 23 November, two beams circulated together for the first time, and the four big LHC detectors recorded their first collision data.

Last night’s achievement brings further confirmation that the LHC is progressing smoothly towards the objective of first physics early in 2010. The world record energy was first broken yesterday evening, when beam 1 was accelerated from 450 GeV, reaching 1050 GeV (1.05 TeV) at 21:28, Sunday 29 November. Three hours later both LHC beams were successfully accelerated to 1.18 TeV, at 00:44, 30 November.

“I was here 20 years ago when we switched on CERN’s last major particle accelerator, LEP,” said Research and Technology Director Steve Myers. “I thought that was a great machine to operate, but this is something else. What took us days or weeks with LEP, we’re doing in hours with the LHC. So far, it all augurs well for a great research programme.”

Next on the schedule is a concentrated commissioning phase aimed at increasing the beam intensity before delivering good quantities of collision data to the experiments before Christmas. So far, all the LHC commissioning work has been carried out with a low intensity pilot beam. Higher intensity is needed to provide meaningful proton-proton collision rates. The current commissioning phase aims to make sure that these higher intensities can be safely handled and that stable conditions can be guaranteed for the experiments during collisions. This phase is estimated to take around a week, after which the LHC will be colliding beams for calibration purposes until the end of the year.

First physics at the LHC is scheduled for the first quarter of 2010, at a collision energy of 7 TeV (3.5 TeV per beam).
Follow LHC progress on twitter at www.twitter.com/cern
For photos, video and latest information see: http://press.web.cern.ch/press/lhc-first-physics/
(Video regarding this event will be available during the day.)
Contact: http://press.web.cern.ch/press/ContactUs.html

*CERN, the European Organization for Nuclear Research, is the world’s leading laboratory for particle physics. It has its headquarters in Geneva. At present, its Member States are Austria, Belgium, Bulgaria, the Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Italy, Netherlands, Norway, Poland, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. India, Israel, Japan, the Russian Federation, the United States of America, Turkey, the European Commission and UNESCO have Observer status.

Katie Yurkewicz

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This week at the LHC

November 27, 2009 | 8:42 am

It was standing room only in CERN’s main auditorium yesterday as the laboratory’s Director for Accelerators and representatives from each of the four large LHC experiments reported on the performance of their respective machines during the first few days of LHC operation. The “LHC Week 1″ seminar was the first in a series of regular reports from the accelerator and experiments.

CERN’s Director for Accelerators Steve Myers presented first, outlining the work that was needed to bring the LHC from the “dark days” of September 19, 2008, when a connection between two superconducting magnets melted and caused significant damage to the accelerator, to the “bright days” of this past weekend. Myers discussed the immense amount of work completed over the last 14 months to repair the damaged section of the LHC, install new systems to avoid a similar incident in the future, prepare the accelerator for beams, and finally create the first collisions. He went through the highlights of last weekend, from first circulating beams to first collisions, calling it “a truly remarkable seven days for CERN.”

Myers also briefly detailed the work still ahead of the accelerator team. Before the beams can be ramped up to the maximum energy of 1.2 TeV for 2009, scientists must collect and analyze more data on the behavior of the accelerator with 450 GeV beams, and finish commissioning the beam protection systems. Only after those steps are completed will the beams be ramped higher in energy. Myers also reported that the decision has not yet been made regarding whether 1.2 TeV-per-beam collisions will take place in 2009.

The four large LHC experiments – ALICE, ATLAS, CMS and LHC – followed. One scientist from each experiment summarized the performance of their detector over the period from first circulating beams to first collisions, and presented the very first results with colliding beams.

You can watch the LHC Week 1 seminar online, or delve into the presentations for more details.

Katie Yurkewicz

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How to turn on the Compact Muon Solenoid

November 25, 2009 | 5:19 pm

A view of the CMS cavern.

A view of the CMS cavern.

When two proton bunches traveling in opposite directions at close to the speed of light first met on Nov. 23 within the Compact Muon Solenoid detector at the Large Hadron Collider at CERN, 100 million detection elements were ready to record.

The trickle of collisions recorded so far will gradually increase to a flood as LHC operators ramp up the collision energy to seven trillion electronvolts.

Scientists expect this to generate a data stream of about 100 megabytes per second.

Before detection equipment could record any data from those first collisions, scientists actually had to turn the detector on. Read on to find out how hundreds of scientists and maintenance personnel power up the CMS detector.

First step: perform maintenance

The size and complexity of modern detectors makes it difficult for scientists to find defective or malfunctioning parts until they have thoroughly tested the whole detector. Because of these challenges, detectors often have a breaking-in period with crews performing the most maintenance after the first run. The nine-day operational period in 2008, although brief, gave CMS scientists an adequate glimpse of the detector, allowing them to perform most of the maintenance associated with a first run.

“During the first operational period, things move in the magnetic field and you really have to understand how they move,” said Fermilab’s Jeff Spalding, project manager for the hadron calorimeter sub-detector. “When you open the detector you have to inspect and look for any sign of movement.”

During the initial testing period, maintenance crews located and repaired minor leaks in the cooling system and adjusted some of the mounting to account for the effects of the 3.8 Tesla magnetic field, Spalding said. Crews turned on and tested individual parts of the detector as they performed maintenance so if there were problems, they could find out before reassembling the detector.

“What you don’t want is to complete all your maintenance, close up the detector, and then find out too late that you have a problem,” Spalding said. “Once we close the detector again to a beam-ready configuration, it would take weeks to backtrack to fix something.”

Put the CMS back together

“CMS is designed in major sub-detector units that fit together almost like Legos,” said Fermilab’s Slawek Tkaczyk, maintenance and operation manager for the CMS silicon tracker. To prepare the CMS for beam, crews must carefully align each of the 13 basic components of the 13,800-ton detector into place. Depending on its initial setup, taking the CMS detector from an open maintenance configuration to being ready for beam takes between two weeks and two months.

Synchronize and fine tune sub-detectors

Even after years of planning and precise alignment, CMS scientists can’t synchronize every element until the detector is in place and powered on. CERN’s Tiziano Camporesi, CMS commissioning and run coordinator, said scientists use cosmic rays interacting with the detector to fine tune and synchronize equipment.

During the shutdown, scientists organized global runs, where all sub-systems operate together to collect cosmic-ray data. Each week scientists held 48-hour midweek global runs, with a continuous six-week run in July.

Begin continuous global runs

The CMS detector has the same turn-on and operational sequence for a cosmic run as it does for receiving actual collision data, so beginning a run with beam is not much different from one without. Months prior to receiving beam, crews have already sealed the collision hall, powered and tested each sub-system, and cooled the magnets. By the time the detector receives beam, it has been operational for weeks. Cumulatively over the life of the detector, about 1 billion cosmic rays have already been recorded.

“The data we collected allowed us to exceed my rosiest predictions because it is extremely high quality,” Camporesi said. “The detector is extremely good in terms of resolution and performance.”

Such fine-tuning creates higher-quality data. Using an automated system that tracks cosmic rays, Tkaczyk said scientists working on the 220 square meters of silicon tracker have been able to improve synchronization from 25 nanoseconds down to a precision of one nanosecond. Tracker crews also bumped up their signal-to-noise ratio from 27-to-1 in August 2008 to 30-to-1 this October.

The final three-week testing period in November used cosmic rays for last-minute adjustments until beam arrived.

Starting a global run can take as few as 20 people, with some working in the central control room and others joining in from remote centers around the world. Beginning to take data only takes about five minutes, but it can take a few hours of tweaks and adjustments before the detector is running well.

“No matter how well you left the detector the last time, people have been doing local things, improvements, repairs, and changes to software,” Camporesi said. “When the detector restarts the process can always be a little bit painful for the first few hours.”

The LHC began running at the injection energy of 450 billion electronvolts. Operators will also increase the beam intensity and the energy to a maximum 1.2 trillion electronvolts per beam in 2009, with CMS scientists using collision data to optimize their detector.

by Chris Knight

Symmetry Intern

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First neutrinos seen in new Japanese detector

November 24, 2009 | 12:32 pm

The following text is from a press release issued by the Japanese high-energy physics laboratory KEK earlier today.

Physicists from the Japanese-led multi-national T2K neutrino collaboration announced today that over the weekend they detected the first events generated by their newly built neutrino beam at the J-PARC accelerator laboratory in Tokai, Japan. Protons from the 30-GeV Main Ring synchrotron were directed onto a carbon target, where their collisions produced charged particles called pions. These pions travelled through a helium-filled volume where they decayed to produce a beam of the elusive particles called neutrinos. These neutrinos then flew 200 metres through the earth to a sophisticated detector system capable of making detailed measurements of their energy, direction, and type.

The data from the complex detector system is still be analysed, but the physicists have seen at least 3 neutrino events, in line with the expectation based on the current beam and detector performance. Prof. Koichiro Nishikawa, director of the Institute for Particle and Nuclear physics at the KEK laboratory and founder of the T2K collaboration, said “The T2K experiment is about to reveal another mystery of neutrinos. I would like to thank everyone who has been supporting this experiment directly or indirectly and to thank our excellent collaborators from all over the world for making it possible to reach this stage of the experiment. All the people in T2K also owe a big debt to the accelerator physicists who worked so hard to build and commission the accelerators. And especially, I would like to thank Japanese government and all of the foreign governments for giving us a strong support and I would like to ask for continuing support. We are ready to do our best to reveal the full mysteries of neutrinos.”

This detection marks the beginning of the operational phase of the T2K experiment, a ~500 physicist, 12 nation collaboration to measure new properties of the ghostly neutrino. Prof. Atsuto Suzuki, Director General of the KEK laboratory, said “Studies of neutrinos in the T2K experiment are going to unveil unknown properties of neutrinos. Researchers around the world must be jealous that once again neutrinos seem to like to reveal new properties in Japan! Neutrino detection is the first step toward it and I can hardly wait to see the experimental results.”

Neutrinos interact only weakly with matter, and thus pass effortlessly through the earth (and mostly through the detectors!). Neutrinos exist in three types, called electron, muon, and tau; linked by particle interactions to their more familiar charged cousins like the electron. Measurements over the last few decades, notably by the Super-Kamiokande and KamLAND neutrino experiments in western Japan, have shown that neutrinos possess the strange property of neutrino oscillations, whereby one type of neutrino will turn into another as they propagate through space. Neutrino oscillations, which require neutrinos to have mass and therefore were not allowed in our previous theoretical understanding of particle physics, probe new physical laws and are thus of great interest in the study of the fundamental constituents of matter. They may even be related to the mystery of why there is more matter than anti-matter in the universe, and thus are the focus of intense study worldwide.

Dr. Takashi Kobayashi, Spokesperson of the T2K experiment, said “The study of neutrino oscillations is one of our best keys for really understanding the most fundamental laws of physics, and this weekend’s progress brings us one more step towards fully understanding them.”

Read more in the full press release.

Press Release

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First particles collide in the Large Hadron Collider

November 23, 2009 | 2:39 pm

Candidate collision event in the CMS detector.

Candidate collision event in the CMS detector. Image copyright CERN.

The first protons collided in the Large Hadron Collider today at CERN outside Geneva, Switzerland. The four largest detectors at the LHC all recorded candidate collision events. Scientists at CERN, throughout the United States, and around the world celebrated the news.

“This is a very exciting moment after so many years of preparation,” said Andrew Lankford from the University of California, Irvine, deputy spokesperson for the ATLAS experiment. Beams were first tuned to produce collisions in the ATLAS detector, which recorded its first candidate for collisions at 2:22 p.m. local time. “The real accomplishment belongs to the accelerator scientists for bringing the beams into collision so quickly after they were first circulated,” he added.

These first collisions are another milestone on the way to the ultimate goal: high-energy collisions of protons in the center of the LHC experiments. They follow a weekend of rapid progress for the LHC. After more than one year of repairs, on Friday evening, November 20, beams were once again circulating in the collider. Over the weekend, the LHC team carefully studied the beams one at a time. Today at approximately 1:30 local time, two beams circulated at the same time for the first time in the LHC. As the two circulating beams passed through each other, protons from each beam hit one another, and the resulting spray of particles registered in the ALICE, ATLAS, CMS, and LHCb detectors.

Celebrations on Friday, November 20, when the first beams of 2009 successfully circulated in the LHC.

Celebrations on Friday, November 20, when the first beams of 2009 successfully circulated in the LHC. Image copyright CERN.

“It’s a great achievement to have come this far in so short a time,” said CERN Director General Rolf Heuer in a statement issued by the laboratory. “But we need to keep a sense of perspective – there’s still much to do before we can start the LHC physics programme.”

These particular collisions happened against the odds.  When the LHC is fully operational, each beam will consist of almost 3000 bunches of more than one hundred billion protons each. Despite the enormous number of protons, each bunch will still contain mostly empty space, and operators will “squeeze” them to increase the chances of two protons colliding. Today, during the testing phase of the accelerator, each beam only contained one bunch of several billion protons, and the beams were not squeezed. Thus the chance of two protons colliding as the bunches passed through each other was very small, and resulted in relatively few recorded collisions in each experiment.

“This is another great technical achievement for the LHC accelerator team and allows the collaborations on the LHC experiments to make further progress in preparing for first high-energy collision data,” said Bob Cousins from the University of California, Los  Angeles, deputy spokesperson for the CMS experiment. “We are getting a chance to test drive our detectors with real collision data.”

More than 1700 scientists, engineers, students, and technicians from 97 US universities and national laboratories have helped design and build the LHC accelerator and its four massive particle detectors, known by their acronyms: ALICE, ATLAS, CMS and LHCb. They are joined by an estimated 8500 colleagues from 59 countries around the world. US participation from institutions in 32 states and Puerto Rico is supported by the Department of Energy’s Office of Science and the National Science Foundation.

“Everyone’s very excited,” said Tom LeCompte from the Department of Energy’s Argonne National Laboratory, the physics coordinator for the ATLAS experiment. “We will use these very first collisions to determine if our detector is ‘in time,’ by which I mean that when a collision occurs, every part of the detector sees it happening at exactly the same time.”

Precise timing is critical for these huge detectors, where millions of separate detector elements, some separated from each other by tens of meters, must be synchronized to within one billionth of a second. The first collisions will also be used by scientists to calibrate and test many other parts of the complex detectors.

The first two protons collided at the relatively low energies with which they were injected into the LHC, 450 GeV each. Over the next few months, LHC scientists will raise the beam energy, aiming for collisions at the world-record energy of 3.5 TeV per beam in early 2010. With these high-energy collisions, the teams on the LHC experiments will embark on their quest to solve some of the mysteries of the universe.

American scientists have contributed critical components to the construction of the LHC accelerator and experiments, continue to play key roles in the operation of the detectors, and will be vital to the success of the experiments in their search for new phenomena such as the Higgs boson and the particles that make up dark matter.

For more images of candidate collision events, check out the CERN press release, the page of ATLAS public event displays, the ALICE Web site, and the CMS e-commentary.

Katie Yurkewicz

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The LHC’s next milestone – two simultaneous circulating beams

November 23, 2009 | 10:01 am

CERN’s Director for Accelerators Steve Myers announced today that for the first time two beams are circulating simultaneously in the LHC. The announcement was made at a press conference held at the laboratory. The first individual circulating beams of 2009 were successfully established on Friday, November 20.

The next steps will be a careful, systematic testing of the accelerator.

“We will systematically go through all the measurements, put all the systems through their tests, and when we’re sure everything’s safe, we will increase the beam intensity,” explained Myers. “During some shifts we will try to accelerate beam to the maximum energy for this year – 1200 GeV per beam. Then we will decide about collisions. Two possibilities are to collide at the 450 GeV injection energy or at 1200 GeV per beam. That is our program until just before Christmas.” Over the next year, the energy will be ramped to 3.5 TeV (3500 GeV) per beam, and then possibly to a maximum of 5 TeV.

“With 3.5 TeV per beam we will open new windows to new physics,” noted CERN Director-General Rolf Heuer.

Fabiola Gianotti, spokesperson of the ATLAS experiment, observed, “This is at the same time the end of twenty years of effort by the international scientific community to build a machine and detector of unprecedented complexity and technological challenges, and the beginning of a fantastic era of physics exploration and discovery.”

By Daisy Yuhas and

Katie Yurkewicz

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The Physics Inventory – November 20, 2009

November 20, 2009 | 7:28 pm

LHC circulated the first beams of 2009 as the first major step in the restart process. Physicists meeting in Evian revealed that through a quirk of statistics and luck, the Tevatron’s new limits on finding the Higgs just got a little weaker. Other physicists joined in a jamboree. Quarks’ motions within protons and neutrons depend on what other protons and neutrons are nearby. Talk of future muon colliders ramped up.

DJ Spooky released his compositions from Antarctica, which “reflect the geometric precision of ice.” Expertlabs.org launched as a way “to help policy-makers in our government take advantage of the expertise of their fellow citizens.” The Nuclear Regulatory Commission’s attempts to attract engineers by getting them dates has led to “eight or nine weddings.”

Representatives of US academic research bodies joined forces to track stimulus spending on research. Japanese science research bracing for a possible major funding blow.

The Sun might not be a “Goldilocks” star after all. Punching holes in a thin sheet of gold can actually prevent light from passing through. Invisibility is not all it looks like. The first programmable quantum processor was created using two beryllium ions.

Watch closely this weekend for LHC start-up activities and possible surprises!

Note: This is the first of a regular series capturing some of the physics highlights of the past week.

David Harris

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LHC circulates first beams of 2009

November 20, 2009 | 4:57 pm

CERN just issued a press release announcing the first circulating beams of 2009 in the Large Hadron Collider. US institutions involved in the LHC also issued a press release. At 10 o’clock this evening, CERN local time, the first beams circulated for several minutes in the clockwise direction. The LHC operations team is now working to circulate a beam in the counter-clockwise direction.

Follow rapid updates at these sources.

Text of CERN press release:

The LHC is back

Geneva, 20 November 2009. Particle beams are once again circulating in the world’s most powerful particle accelerator, CERN’s Large Hadron Collider (LHC). This news comes after the machine was handed over for operation on Wednesday morning. A clockwise circulating beam was established at ten o’clock this evening. This is an important milestone on the road towards first physics at the LHC, expected in 2010.

“It’s great to see beam circulating in the LHC again,” said CERN Director General Rolf Heuer. “We’ve still got some way to go before physics can begin, but with this milestone we’re well on the way.”

The LHC circulated its first beams on 10 September 2008, but suffered a serious malfunction nine days later. A failure in an electrical connection led to serious damage, and CERN has spent over a year repairing and consolidating the machine to ensure that such an incident cannot happen again.

“The LHC is a far better understood machine than it was a year ago,” said CERN’s Director for Accelerators, Steve Myers. “We’ve learned from our experience, and engineered the technology that allows us to move on. That’s how progress is made.”

Recommissioning the LHC began in the summer, and successive milestones have regularly been passed since then. The LHC reached its operating temperature of 1.9 Kelvin, or about -271 Celsius, on 8 October. Particles were injected on 23 October, but not circulated. A beam was steered through three octants of the machine on 7 November, and circulating beams have now been re-established. The next important milestone will be low-energy collisions, expected in about a week from now. These will give the experimental collaborations their first collision data, enabling important calibration work to be carried out. This is significant, since up to now, all the data they have recorded comes from cosmic rays. Ramping the beams to high energy will follow in preparation for collisions at 7 TeV (3.5 TeV per beam) next year.

Particle physics is a global endeavour, and CERN has received support from around the world in getting the LHC up and running again.

“It’s been a herculean effort to get to where we are today,” said Myers. “I’d like to thank all those who have taken part, from CERN and from our partner institutions around the world.”

A press conference will be held at CERN, at the Globe of Science and Innovation, at 2pm on Monday 23 November, and webcast at: http://webcast.cern.ch/. Submit your questions to @CERN via Twitter. We cannot guarantee that all questions will be answered.

Follow LHC progress on twitter at www.twitter.com/cern

For photos, video and latest information see: http://press.web.cern.ch/press/lhc-first-physics/

Contact: http://press.web.cern.ch/press/ContactUs.html

CERN, the European Organization for Nuclear Research, is the world’s leading laboratory for particle physics. It has its headquarters in Geneva. At present, its Member States are Austria, Belgium, Bulgaria, the Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Italy, Netherlands, Norway, Poland, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. India, Israel, Japan, the Russian Federation, the United States of America, Turkey, the European Commission and UNESCO have Observer status.

Text of the US release:

SOURCE: Berkeley Lab, Brookhaven Lab, Fermi National Accelerator Laboratory

FOR IMMEDIATE RELEASE

November 20, 2009

Beams are Back in the Large Hadron Collider

Batavia, IL, Berkeley, CA and Upton, NY – Particle beams are once again zooming around the world’s most powerful particle accelerator—the Large Hadron Collider—located at the CERN laboratory near Geneva, Switzerland.  On November 20 at 4:00 p.m.  EST, a clockwise circulating beam was established in the LHC’s 17-mile ring.

After more than one year of repairs, the LHC is now back on track to create high-energy particle collisions that may yield extraordinary insights into the nature of the physical universe.

“The LHC is a machine unprecedented in size, in complexity, and in the scope of the international collaboration that has built it over the last 15 years,” said Dennis Kovar, U.S. Department of Energy Associate Director of Science for High Energy Physics. “I congratulate the scientists and engineers that have worked to get the LHC back up and running, and look forward to the discoveries to come.”

American scientists have played an important role in the construction of the LHC.  About 150 scientists, engineers and technicians from three DOE national laboratories—Brookhaven Lab, Fermilab and Berkeley Lab—built critical accelerator components.  They are joined by colleagues from DOE’s SLAC National Accelerator Laboratory and the University of Texas at Austin in ongoing LHC accelerator R&D. The work has been supported by the DOE Office of Science.

Circulating beams are a major milestone on the way to the ultimate goal: data from high-energy particle collisions in each of the LHC’s four major particle detectors. Over the next few months, scientists will create collisions between two beams of protons. These very first LHC collisions will take place at the relatively low energy of 900 GeV. They will then raise the beam energy, aiming for collisions at the world-record energy of 7 TeV in early 2010. With these high-energy collisions, the hunt for discoveries at the LHC will begin.

“It’s great to see beam circulating in the LHC again,” said CERN Director General Rolf Heuer. “We’ve still got some way to go  before physics can begin, but with this milestone we’re well on the way.”

In all, an estimated 10,000 people from 60 countries have helped design and build the LHC accelerator and its four massive particle detectors, including more than 1,700 scientists, engineers, students and technicians from 97 U.S. universities and laboratories in 32 states and Puerto Rico supported by the DOE Office of Science and the National Science Foundation.

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Media contacts:

Brookhaven National Laboratory: Kendra Snyder, ksnyder@bnl.gov, 631-344-8191

Fermi National Accelerator Laboratory: Elizabeth Clements, lizzie@fnal.gov, 630-399-1777

Lawrence Berkeley National Laboratory: Paul Preuss, paul_preuss@lbl.gov, 510-486-6249

CERN: James Gillies, james.gillies@cern.ch, +41 22 767 4101

Notes for editors:

Photos and video from today’s events are available at:

http://press.web.cern.ch/press/lhc-first-physics/

Information about the US participation in the LHC is available at http://www.uslhc.us. Follow US LHC on Twitter at twitter.com/uslhc.

Berkeley Lab is a U.S. Department of Energy national laboratory located in Berkeley, California. It conducts unclassified scientific research for DOE’s Office of Science and is managed by the University of California. Visit our News center at http://newscenter.lbl.gov.

Brookhaven National Laboratory is operated and managed for DOE’s Office of Science by Brookhaven Science Associates and Battelle. Visit Brookhaven Lab’s electronic newsroom for links, news archives, graphics, and more:http://www.bnl.gov/newsroom.

Fermilab is a U.S. Department of Energy Office of Science national laboratory, operated under contract by the Fermi Research Alliance, LLC. The U.S. Department of Energy Office of Science is the nation’s single-largest supporter of basic research in the physical sciences. Visit Fermilab’s website at http://www.fnal.gov.

CERN, the European Organization for Nuclear Research, is the world’s leading laboratory for particle physics. It has its headquarters in Geneva. At present, its Member States are Austria, Belgium, Bulgaria, the Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Italy, Netherlands, Norway, Poland, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. India, Israel, Japan, the Russian Federation, the United States of America, Turkey, the European Commission and UNESCO have Observer status.

Katie Yurkewicz

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Your guide to following the progress of the LHC online

November 20, 2009 | 3:30 pm

A 3D display of a beam splash at the CMS detector

A 3D display of a beam splash at the CMS detector

Scientists at CERN are in the process of restarting the Large Hadron Collider at this very moment!

Here’s a handy guide for following their minute-by-minute progress over the Internet.

The CERN Twitter feed and US LHC Twitter feed are announcing the progress of the beam as it makes its way around the ring.

Bloggers for the US/LHC blogs and Quantum Diaries are posting live updates from CERN.

Scientists are giving readers a peek at the action with images from LHC beam monitoring systems at the CMS eCommentary site and the ATLAS real-time events site.

And of course you can follow progress here at symmetry breaking and on our symmetrymag Twitter feed.

Happy reading!

Update: The first press releases from CERN and US partners.

Kathryn Grim

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