A5035088864- Nuclear Physics and Applications
- Particle accelerators and beam dynamics
- Nuclear reactor physics and engineering
- Superconducting Materials and Applications
- Magnetic confinement fusion research
- Particle Detector Development and Performance
- Nuclear Materials and Properties
- Radiation Detection and Scintillator Technologies
- Fusion materials and technologies
- Spacecraft and Cryogenic Technologies
- Ultrasound and Cavitation Phenomena
- Muon and positron interactions and applications
- Radiation Effects in Electronics
- Fluid Dynamics Simulations and Interactions
- Plasma Diagnostics and Applications
- Particle Accelerators and Free-Electron Lasers
- Planetary Science and Exploration
- Astro and Planetary Science
- Fluid Dynamics and Heat Transfer
- Electromagnetic Launch and Propulsion Technology
- Fluid Dynamics and Mixing
- Energetic Materials and Combustion
- Advanced Fiber Optic Sensors
- Metal and Thin Film Mechanics
- Radioactive contamination and transfer
Oak Ridge National Laboratory
2012-2023
Spallation Neutron Source
2002-2018
Brookhaven National Laboratory
2002
China Spallation Neutron Source
2001
Northrop Grumman (United States)
1989
An important input property in the development of process models for resistance spot welding is electrical contact resistance. A model pressure and temperature dependence was developed from established concepts The key to developing desired relationship determining surface roughness characteristics, which experimentally problematic. To overcome this difficulty contacting interfaces measured as a function applied across interfaces. Using known information about bulk resistivity mechanical...
We report initial results of exposing low-Z solid and high-Z liquid targets to 150-ns, 4/spl times/10/sup 12/ proton pulses with spot sizes on the order 1 2 mm. The energy deposition density approached 100 J/g. Diagnostics included fiberoptic strain sensors target high-speed photography targets. This work is part R&D program Neutrino Factory Muon Collider Collaboration.
Candidate moderator configurations for a short-pulse second target station (STS) at the Oak Ridge National Laboratory Spallation Neutron Source (SNS) have been identified using global optimizer framework built around MCNPX particle transport code. brightness metrics were selected as figure-of-merit. We assumed that STS would use one out of six proton pulses produced by an SNS accelerator upgraded to operate 1.3 GeV energy, 2.8 MW power and 60 Hz repetition rate. The simulations indicate peak...
We describe the measurement of fast dynamic strains in mercury target module spallation neutron source using customized high-radiation-tolerant fiber-optic strain sensors. The sensors are made from fluorine-doped single-mode optical fibers that demonstrated high radiation tolerance at 1300 nm. A digital phase demodulation scheme is employed signal interrogation system, which enables bandwidth and has an excellent adaptability to sensor output power fluctuations gap variations. Fast transient...
In this work, we investigate the effect of neutron moderator dimensions on performance scattering instruments at Spallation Neutron Source (SNS). a recent study planned second target station SNS facility, have found that play significant role in determining its surface brightness. A smaller may be significantly brighter over viewing area. One immediate implications finding is for modern instrument designs, and brightness to incorporated as an integrated optimization parameter. Here,...
The Spallation Neutron Source (SNS) creates neutrons by striking a liquid mercury target with short pulses of high-energy protons. SNS targets have been operated helium microbubble gas injection into portions the flowing since 2017. measurements during in situ testing showed that strain response stainless steel vessel significantly decreased injection. Strain reductions ranged from 40% to 75% for operating gas-injection rates between 2 and 3 standard liters per minute. These allowed operate...
The effectiveness of small-bubble gas injection to mitigate cavitation-induced erosion damage and decrease strain in Spallation Neutron Source (SNS) target vessels was characterized using photography, laser-line scanning, in-situ vessel measurements. Observations from early targets showed that caused appreciable mass loss along the inner wall. Later designs incorporated a cavitation mitigation technique called injection, which small helium bubbles were introduced into flowing mercury during...
This study outlines a concept that would leverage the existing proton accelerator at Spallation Neutron Source (SNS) of Oak Ridge National Laboratory to enable transformative science via one world-class facility serving two missions: Single Event Effects (SEE) and Muon Spectroscopy (μSR). The μSR portion deliver world's highest flux resolution pulsed muon beams for material characterization purposes, with precision capabilities well beyond comparable facilities. SEE neutron, proton,...