Alain Bonneville, a geophysicist at Pacific Northwest National Laboratory, will present details on the muon detector and the comparative field tests at the American Geophysical Union Fall Meeting in San Francisco. His talk is Thursday, December 15, 2016 at 5:40 p.m. in Moscone South, Room 307.
Borehole muon detector advances imaging and monitoring of CO2 storage sites
Muons, once used to explore the inside of pyramids and volcanoes alike, are enabling researchers to see deep underground with a technological breakthrough from PNNL.
Invisible to the naked eye, muons are elementary particles created by the collisions of cosmic rays with molecules in the atmosphere. Muons are constantly raining down on the earth at various angles.
They can pass through materials, such as earth and rock, and detecting these particles have helped researchers "see" the inside of structures such as the pyramids of Giza. But the detectors -- which measure the number and trajectories of muons hitting the detector -- are rather large, about the size of a small car.
In order to be able to "see" changes in density underground, the detectors need to be much smaller. PNNL researchers and their partners have created a smaller -- just six inches in diameter and about three feet long -- and more rugged version. This mini detector will be able to go thousands of feet underground via horizontal boreholes.
The borehole-sized detectors are made out of plastic components and optical fibers that carry signals to electronics to count each muon that passes through the device. This summer, researchers tested its output against two existing large detectors in a tunnel at Los Alamos National Laboratory.
The results were the same as the larger machines developed by LANL and Sandia National Laboratories. Like its big brothers, the small detector can measure anomalies in the flux of muons that pass through.
A change in the number of muons hitting the detector during a certain period and space indicate a change in density within the structure or object -- for instance a plume or reservoir of carbon dioxide underground.
The data convert to an image and both could help monitor CO2 movement or leakage underground at a sequestration site, and have applications for a wide variety of subsurface imaging.
Interdisciplinary teams at Pacific Northwest National Laboratory address many of America's most pressing issues in energy, the environment and national security through advances in basic and applied science. Founded in 1965, PNNL employs 4,400 staff and has an annual budget of nearly $1 billion. It is managed by Battelle for the U.S. Department of Energy's Office of Science. As the single largest supporter of basic research in the physical sciences in the United States, the Office of Science is working to address some of the most pressing challenges of our time. For more information on PNNL, visit the PNNL News Center, or follow PNNL on Facebook, Google+, LinkedIn and Twitter.
Susan Bauer | EurekAlert!
Novel Nano-CT device creates high-resolution 3D-X-rays of tiny velvet worm legs
07.11.2017 | Technische Universität München
NRL clarifies valley polarization for electronic and optoelectronic technologies
20.10.2017 | Naval Research Laboratory
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,...
Pillared graphene would transfer heat better if the theoretical material had a few asymmetric junctions that caused wrinkles, according to Rice University...
15.11.2017 | Event News
15.11.2017 | Event News
30.10.2017 | Event News
17.11.2017 | Physics and Astronomy
17.11.2017 | Health and Medicine
17.11.2017 | Studies and Analyses