A5084553796- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Particle physics theoretical and experimental studies
- Nuclear Physics and Applications
- Atomic and Subatomic Physics Research
- Astrophysics and Cosmic Phenomena
- Nuclear reactor physics and engineering
- Dark Matter and Cosmic Phenomena
- Graphite, nuclear technology, radiation studies
- Nuclear and radioactivity studies
- Superconducting Materials and Applications
- Muon and positron interactions and applications
- Boron Compounds in Chemistry
- Non-Destructive Testing Techniques
- Nuclear Materials and Properties
- Particle Accelerators and Free-Electron Lasers
- Geophysical and Geoelectrical Methods
- Radioactivity and Radon Measurements
- Neutrino Physics Research
- Radiation Therapy and Dosimetry
- Advanced X-ray and CT Imaging
- Quantum, superfluid, helium dynamics
Los Alamos National Laboratory
2009-2025
Los Alamos Medical Center
2014
Los Alamos National Security (United States)
2013
Over 120 million vehicles enter the United States each year. Many are capable of transporting hidden nuclear weapons or material. Currently deployed X-ray radiography systems limited because they cannot be used on occupied and energy dose too low to penetrate many cargos. We present a new technique that overcomes these limitations by obtaining tomographic images using multiple scattering cosmic radiation as it transits vehicle. When coupled with passive detection, muon interrogation could...
The passage of muons through matter is dominated by the Coulomb interaction with electrons and nuclei. muon leads to continuous energy loss stopping muons. nuclei angular diffusion. We present experimental images a nuclear reactor, AGN-201M reactor at University New Mexico, using data measured particle tracker built from set sealed drift tubes. are compared geant4 model. In both simulation, we identify specific regions corresponding elements structure, including its core, moderator, shield.
Cosmic ray muons that reach the earth's surface provide a natural source of radiation is used for radiography. In this paper, we show radiography using cosmic background provides method can be to monitor bulk aspects human anatomy. We describe measure changes in patients as function time by muon Modeling shows tomography could hourly readouts parameters such lung density with sufficient sensitivity detect inflammation lungs in, e.g., COVID patients.
The passage of muons through matter is dominated by the Coulomb interaction with electrons and nuclei in matter. muon leads to continuous energy loss stopping muons. angular diffusion. Using both stopped angle diffusion interactions allows us determine density identify materials. Here we demonstrate material identification using data taken at Los Alamos a particle tracker built from set sealed drift tubes commercial electronics software, Mini Muon Tracker (MMT).
Most of the plutonium in world resides inside spent nuclear reactor fuel rods. This high-level radioactive waste is commonly held long-term storage within large, heavily shielded casks. Currently, international safeguards inspectors have no stand-alone method verifying amount stored a sealed cask. Here we demonstrate experimentally that measurements scattering angles cosmic ray muons which pass through cask can be used to determine if assemblies are missing without opening application...
In this report, we assess muon multiple scattering tomography as a non-destructive inspection technique in several typical areas of interest to the nuclear power industry, including monitoring concrete degradation, gate valve conditions, and pipe wall thickness. This work is motivated by need for imaging methods that do not require licensing, training, safety controls x-rays, be able penetrate considerable overburden examine internal details components are otherwise inaccessible, with...
Muon tomography is a technique that uses information contained in the Coulomb scattering of cosmic ray muons to generate three dimension images volumes between tracking detectors. Advantages this are ability penetrate significant overburden and absence any additional dose beyond natural flux. Disadvantages include long exposure times limited resolution because low Here we compare needed image objects using both vertically horizontally mounted detectors develop predictive model for other geometries.
A detector system for assessing damage to the cores of Fukushima Daiichi nuclear reactors by using cosmic-ray muon tomography was developed. The consists a pair drift-tube tracking detectors 7.2× 7.2-m2 area. Each tracker 6 x-layer and y-layer detectors. is capable measuring tracks with 12 mrad angular resolutions, operating under 50-μ Sv/h radiation environment removing gamma induced background novel time-coincidence logic. An estimated resolution observe fuel debris at 0.3 m when core...
We have built a detector capable of locating high Z objects in the sampling (middle) region detector. As atomic number increases, radiation length rapidly decreases, yielding larger variance scattering angle. Cosmic ray muon tomography works by tracking muons above region, and them below as well. The difference between two trajectories yield information, via variance, materials contained within region[1]. One most important aspects cosmic is minimizing exposure time. flux about 1/cm\^2/min,...
We compare different algorithms for detecting a 5 cm tungsten cube using cosmic ray muon technology. In each case, simple tomographic technique was used position reconstruction, but the scattering angles were differently to obtain density signal. Receiver operating characteristic curves images made average angle squared, median of squared angle, and multi-energy group fit angular distributions scenes with without cube. The receiver show that treatment is superior method image reconstruction.
Muon tomography is a technique that uses cosmic ray muons to generate three dimensional images of volumes using information contained in the Coulomb scattering muons. Advantages this are ability rays penetrate significant overburden and absence any additional dose delivered subjects under study above natural flux. Disadvantages include relatively long exposure times poor position resolution complex algorithms needed for reconstruction. Here we demonstrate new method obtaining improved...
The authors present here a new method to image reinforcement elements inside thick structures and the results of demonstration measurement performed on mock-up wall built at Los Alamos National Laboratory. method, referred as “multiple scattering muon radiography”, relies use cosmic-ray muons probes. work described in this article was prove viability technique means interior dome Florence Cathedral Santa Maria del Fiore, one UNESCO World Heritage sites among highest profile buildings...
The dome of Santa Maria del Fiore, Florence Cathedral, was built between 1420 and 1436 by architect Filippo Brunelleschi it is now cracking under its own weight. Engineering efforts are way to model the dome's structure reinforce against further deterioration. According some scholars, might have reinforcement structures into itself; however, only known a wood chain 7.75 m above springing Cupola. Multiple scattering muon radiography non-destructive imaging method that can be used image...