Wordout

“10 Fascinating Facts About The LHC

Fact 1: When the 27-km long circular tunnel was excavated, between Lake
Geneva and the Jura mountain range, the two ends met up to within 1 cm.

Fact 2: Each of the 6400 superconducting filaments of niobium–titanium
in the cable produced for the LHC is about 0.007 mm thick, about 10 times
thinner than a normal human hair. If you added all the filaments together
they would stretch to the Sun and back five times with enough left over for
a few trips to the Moon.

Fact 3: All protons accelerated at CERN are obtained from standard hydro-
gen. Although proton beams at the LHC are very intense, only 2 nanograms
of hydrogen(*) are accelerated each day. Therefore, it would take the LHC
about 1 million years to accelerate 1 gram of hydrogen.

Fact 4: The central part of the LHC will be the world’s largest fridge. At a
temperature colder than deep outer space, it will contain iron, steel and the
all important superconducting coils.

Fact 5: The pressure in the beam pipes of the LHC will be about ten times
lower than on the Moon. This is an ultrahigh vacuum.

Fact 6: Protons at full energy in the LHC will be traveling at 0.999999991
times the speed of light. Each proton will go round the 27 km ring more than
11 000 times a second.

Fact 7: At full energy, each of the two proton beams in the LHC will have a
total energy equivalent to a 400 t train (like the French TGV) traveling at
150 km/h. This is enough energy to melt 500 kg of copper.

Fact 8: The Sun never sets on the ATLAS collaboration. Scientists working on
the experiment come from every continent in the world, except Antarctica.

Fact 9: The CMS magnet system contains about 10 000 t of iron, which is
more iron than in the Eiffel Tower.

Fact 10:The data recorded by each of the big experiments at the LHC will
be enough to ill around 100 000 DVDs every year.

(*)the total mass of protons is calculated at rest”

First beam in the LHC – accelerating science

Geneva, 10 September 2008. The first beam in the Large Hadron Collider at CERN1 was successfully steered around the full 27 kilometres of the world’s most powerful particle accelerator at 10h28 this morning. This historic event marks a key moment in the transition from over two decades of preparation to a new era of scientific discovery.

“It’s a fantastic moment,” said LHC project leader Lyn Evans, “we can now look forward to a new era of understanding about the origins and evolution of the universe.”

Starting up a major new particle accelerator takes much more than flipping a switch. Thousands of individual elements have to work in harmony, timings have to be synchronized to under a billionth of a second, and beams finer than a human hair have to be brought into head-on collision. Today’s success puts a tick next to the first of those steps, and over the next few weeks, as the LHC’s operators gain experience and confidence with the new machine, the machine’s acceleration systems will be brought into play, and the beams will be brought into collision to allow the research programme to begin.

Once colliding beams have been established, there will be a period of measurement and calibration for the LHC’s four major experiments, and new results could start to appear in around a year. Experiments at the LHC will allow physicists to complete a journey that started with Newton’s description of gravity. Gravity acts on mass, but so far science is unable to explain the mechanism that generates mass. Experiments at the LHC will provide the answer. LHC experiments will also try to probe the mysterious dark matter of the universe – visible matter seems to account for just 5% of what must exist, while about a quarter is believed to be dark matter. They will investigate the reason for nature’s preference for matter over antimatter, and they will probe matter as it existed at the very beginning of time.

“The LHC is a discovery machine,” said CERN Director General Robert Aymar, “its research programme has the potential to change our view of the Universe profoundly, continuing a tradition of human curiosity that’s as old as mankind itself.”

Tributes have been coming in from laboratories around the world that have contributed to today’s success.

“The completion of the LHC marks the start of a revolution in particle physics,” said Pier Oddone, Director of the US Fermilab. “We commend CERN and its member countries for creating the foundation for many nations to come together in this magnificent enterprise. We appreciate the support that DOE and NSF have provided throughout the LHC’s construction. We in the US are proud to have contributed to the accelerator and detectors at the LHC, together with thousands of colleagues around the world with whom we share this quest.”

“I congratulate you on the start-up of the Large Hadron Collider,” said Atsuto Suzuki, Director of Japan’s KEK laboratory, “This is a historical moment.”

“It has been a fascinating and rewarding experience for us,” said Vinod C. Sahni, Director of India’s Raja Ramanna Centre for Advanced Technology, “I extend our best wishes to CERN for a productive run with the LHC machine in the years to come.”

“As some might say: ‘One short trip for a proton, but one giant leap for mankind!’ TRIUMF, and indeed all of Canada, is delighted to bear witness to this amazing feat,” said Nigel S. Lockyer, Director of Canada’s TRIUMF laboratory. “Everyone has been involved but CERN is to be especially congratulated for bringing the world together to embark on such an incredible adventure.”

In a visit to CERN shortly before the LHC’s start-up United Nations Secretary General, Ban Ki-moon said: “I am very honored to visit CERN, an invaluable scientific institution and a shining example what international community can achieve through joint efforts and contribution. I convey my deepest admiration to all the scientists and wish them all the success for their research for peaceful development of scientific progress.”

1 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.