At 1,950 metric tons, the section, which contains the detector's solenoid magnet, weighs as much as five jumbo jets and is 16 meters tall, 17 meters wide and 13 meters long. Its descent is expected to take about 10 hours.
"This is a challenging feat of engineering, as there are just 20 centimeters of leeway between the detector and the walls of the shaft," said CERN physicist Austin Ball, technical coordinator of CMS. "The detector is suspended by four massive cables, each with 55 strands, and attached to a step-by-step hydraulic jacking system, with sophisticated monitoring and control to ensure the object does not sway or tilt."
Of the CMS collaboration's approximately 1500 physicists, about one-third are U.S. scientists. The Department of Energy's Fermi National Accelerator Laboratory is the host laboratory for US CMS, and U.S. scientists have designed, built and delivered to CERN several key elements of the CMS detector. Currently, U.S. contributions to CMS are more than 98 percent complete. A U.S. team from Fermilab recently carried out a precision mapping of the magnetic field of the CMS solenoid magnet that is being lowered today. By observing the curvature of the paths of charged particles in the magnetic field, physicists will calculate the energy of particles flying out from billions upon billions of proton-proton collisions that will occur inside the detector.
"We are proud of our contribution to the extraordinary international scientific endeavor now taking shape at the LHC," said Associate Director for High Energy Physics at DOE's Office of Science Dr. Robin Staffin. "We applaud the engineering tour de force of today's CMS milestone at CERN. Each step forward at the LHC experiments and the accelerator brings us closer to the start of scientific operations and to breakthroughs in our understanding of the physics of the universe."
Experimenters have already lowered the first seven of 15 pieces of the CMS detector, with the first piece arriving in the experimental cavern on November 30, 2006. The giant section descending today marks the halfway point in the lowering process, with the last piece scheduled to make its descent in summer 2007. Particle detectors are typically assembled underground, where the accelerator tunnel is located. CMS has broken with tradition by starting assembly before completion of the underground cavern, taking advantage of a spacious surface assembly hall to preassemble and pretest the detector's myriad components and systems.
"This is an impressive milestone in the complex installation of the CMS particle detector," said Dr. Moishe Pripstein, Program Director at the National Science Foundation. "It augurs well for being ready for first beam collisions at the LHC. We are delighted that scientists from U.S. universities and from Fermilab are making substantial technical contributions to this grand international collaboration and look forward to exciting results in the next several years."
Physicists are preparing the CMS detector and its sister detector, ATLAS, to take data at CERN's Large Hadron Collider, where scientists predict that they will make fundamental discoveries about the universe, using very-high-energy proton collisions. Beyond revealing a new world of unknown particles, the LHC experiments could explain why those particles exist and behave as they do. They could discover the origins of mass, shed light on dark matter, uncover hidden symmetries of the universe, and possibly find extra dimensions of space.
Judy Jackson | EurekAlert!
NASA's James Webb Space Telescope completes final cryogenic testing
21.11.2017 | NASA/Goddard Space Flight Center
Previous evidence of water on mars now identified as grainflows
21.11.2017 | US Geological Survey
The WHO reports an estimated 429,000 malaria deaths each year. The disease mostly affects tropical and subtropical regions and in particular the African continent. The Fraunhofer Institute for Silicate Research ISC teamed up with the Fraunhofer Institute for Molecular Biology and Applied Ecology IME and the Institute of Tropical Medicine at the University of Tübingen for a new test method to detect malaria parasites in blood. The idea of the research project “NanoFRET” is to develop a highly sensitive and reliable rapid diagnostic test so that patient treatment can begin as early as possible.
Malaria is caused by parasites transmitted by mosquito bite. The most dangerous form of malaria is malaria tropica. Left untreated, it is fatal in most cases....
The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.
Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...
Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.
That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...
Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.
During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....
The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.
Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...
15.11.2017 | Event News
15.11.2017 | Event News
30.10.2017 | Event News
21.11.2017 | Physics and Astronomy
21.11.2017 | Physics and Astronomy
21.11.2017 | Life Sciences