Today Brandeis researchers in the U.S. ATLAS collaboration joined colleagues around the world to celebrate a pivotal landmark in the construction of the Large Hadron Collider (LHC) – the lowering of the final piece of the ATLAS particle detector into the underground collision hall at CERN in Geneva, Switzerland.
Experiments conducted at this revolutionary LHC facility, poised to become the world’s most powerful particle accelerator, may help scientists unravel some of the deepest mysteries in particle physics. The U.S. branch of the collaboration (U.S. ATLAS), based out of the U.S. Department of Energy’s (DOE) Brookhaven National Laboratory, built and delivered several key elements of the ATLAS detector.
The last piece of ATLAS lowered into the ATLAS experimental cavern is one of two elements known as the small wheels. The two ATLAS small wheels, though little in comparison to the rest of the ATLAS detector, are each about 30 feet in diameter and weigh 100 tons. The wheels are covered with sensitive detectors that will be used to identify and measure the momentum of subatomic particles called muons that are created in collisions at the LHC. The entire detector system has an area equal to three football fields, consisting of 100 million independent electronic channels. As charged particles pass through a magnetic field created by superconducting magnets, this detector has the ability to accurately track them to the precision of the width of a human hair.
Over the last fourteen years, the Brandeis high-energy physics group has been heavily involved in the mechanical design and assembly of the small wheel, as well as the production of the muon measurement chambers and the alignment of the endcap muon system.
“We believe that muons are signatures of interesting events,” says Branadeis physicist James Bensinger. If enough muon-related events are detected, it’s entirely likely that high-energy particle physics could cross the threshold to a new era of understanding, perhaps moving closer to that obscure “theory of everything.”
“We’re proud of the teams involved in this international scientific endeavor - one of the largest collaborative efforts ever attempted in the physical sciences,” said Dennis Kovar, acting associate director for High Energy Physics in DOE’s Office of Science. “This technical landmark brings us a huge step closer to unveiling a new level of understanding of our universe.”
Of the almost 2,100 participants in the ATLAS collaboration, about 420 are U.S. physicists, engineers, and graduate students. Hailing from 38 universities and four national laboratories, these U.S. collaborators are supported by DOE and the National Science Foundation (NSF).
“This is a remarkable milestone in the complicated construction of the ATLAS detector,” said Joseph Dehmer, director of the Physics Division at the NSF. “The LHC is one of the most exciting physics experiments for this decade and beyond. We are impressed by the hundreds of U.S. university and national laboratory scientists who are working hard to make this extraordinary project a reality. We look forward to the groundbreaking results that are now just around the corner.”
Involving the work of 450 physicists from 48 institutions around the world, lowering this last small wheel marks the end of a decade of planning and construction of the muon spectrometer system.
“For me personally, this is the culmination of many years of work designing, planning, and installing the mechanical structure,” said Vincent Hedberg, who led the development of the small wheel support system. “For ATLAS as a whole, the last large detector is finally in place.”
Brookhaven National Laboratory led the development of the 32 muon detectors in the inner ring of the wheels, working with Stony Brook University, the University of Arizona, and the University of California, Irvine. In addition, numerous U.S. universities built the 64 precision muon chambers on the small wheels; these include: the University of Michigan, University of Washington, Seattle, and the Boston Muon Consortium, which involves Boston University, Brandeis University, Harvard University, the Massachusetts Institute of Technology, and Tufts University.
“These fragile detectors comprise the largest measuring device ever constructed for high-energy physics,” said George Mikenberg, ATLAS muon project leader.
Experiments at the LHC will allow physicists to take a big leap in their exploration of the universe. The ATLAS detector may help its scientists unravel some of the deepest mysteries in particle physics such as the origin of mass or the identification of dark matter. The ATLAS collaboration will now focus on commissioning the detector in preparation for the start-up of the LHC this summer.
Researchers discover link between magnetic field strength and temperature
21.08.2018 | American Institute of Physics
Smallest transistor worldwide switches current with a single atom in solid electrolyte
17.08.2018 | Karlsruher Institut für Technologie (KIT)
There are currently great hopes for solid-state batteries. They contain no liquid parts that could leak or catch fire. For this reason, they do not require cooling and are considered to be much safer, more reliable, and longer lasting than traditional lithium-ion batteries. Jülich scientists have now introduced a new concept that allows currents up to ten times greater during charging and discharging than previously described in the literature. The improvement was achieved by a “clever” choice of materials with a focus on consistently good compatibility. All components were made from phosphate compounds, which are well matched both chemically and mechanically.
The low current is considered one of the biggest hurdles in the development of solid-state batteries. It is the reason why the batteries take a relatively long...
New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference
Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...
Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...
Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.
When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...
Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.
Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....
17.08.2018 | Event News
08.08.2018 | Event News
27.07.2018 | Event News
21.08.2018 | Ecology, The Environment and Conservation
21.08.2018 | Life Sciences
21.08.2018 | Power and Electrical Engineering