Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Actinium-225 (1)
- Associated Particle Imaging (1)
- Collector probes (1)
- DIII-D (1)
- Deuteron irradiation (1)
-
- Energy Resolution (1)
- Impurity Transport (1)
- Impurity transport (1)
- Ineastic neutron scattering (1)
- Ion Flux (1)
- Isotope production (1)
- Local dynamics (1)
- Metallic glasses (1)
- Metallic liquids (1)
- Monte Carlo simulation (1)
- Nuclear fusion (1)
- PMI (1)
- Plasma (1)
- Plasma physics (1)
- Protactinium-229 (1)
- Radiation Detection (1)
- Scintillator (1)
- Structure (1)
- Targeted Alpha Therapy (1)
- Timing Resolution (1)
- Tokamaks (1)
- Van Hove function (1)
Articles 1 - 5 of 5
Full-Text Articles in Engineering
Impurity Production And Transport In The Prototype Material Plasma Exposure Experiment, Clyde J. Beers
Impurity Production And Transport In The Prototype Material Plasma Exposure Experiment, Clyde J. Beers
Doctoral Dissertations
The Prototype Material Plasma Exposure eXperiment (Proto-MPEX) is a linear pulse plasma device at Oak Ridge National Laboratory with the purpose of doing the research and development for the heating concepts on the planned full MPEX device. The goal of MPEX is to perform material studies at fusion relevant conditions. To understand the conditions at the material target for performing plasma-material interaction studies the ion temperature and density, the electron temperature and density, and the particle flux and fluence must be known. Impurities within Proto-MPEX can alter the desired conditions at the material target and need to be understood for …
Production Of Protactinium-229 Via Deuteron Irradiation Of Thorium-232, Naser Burahmah
Production Of Protactinium-229 Via Deuteron Irradiation Of Thorium-232, Naser Burahmah
Doctoral Dissertations
225Ac [Actinium-225] is a promising radionuclide for targeted alpha therapy of cancer. 229Pa can lead to the production of 229Th [Thorium-229] and 225Ac [Actinium-225]. Deuteron bombardment on natural thorium targets has been investigated to measure cross sections of protactinium isotopes. In this work, 229Pa [Protactinium-229] excitation function was measured via deuteron energies up to 50 MeV [Mega electron volt] of thin thorium foils. The irradiation took place at Lawrence Berkeley National Laboratory’s (LBNL) 88-Inch Cyclotron. The target processing and analysis were performed at Oak Ridge National Laboratory (ORNL). The target consisted of 4 thin foils …
Fabrication Of Specialized Scintillators For Nuclear Security Applications, Cordell James Delzer
Fabrication Of Specialized Scintillators For Nuclear Security Applications, Cordell James Delzer
Doctoral Dissertations
Radiation detectors are important for a variety of fields including medical imaging, oil drilling, and nuclear security. Within nuclear security, they can serve a multitude of purposes whether that be imaging, localization, isotopic identification, or even just activity measurement. Even without directly seeing a nuclear material it is often able to notice their existence without a detector. Scintillators make up an important part of these detectors due to their large intrinsic efficiency, low cost, large volume, and relatively low upkeep. Due to the importance of the large number of purposes these scintillators may be used for, it can often be …
Collector Probe Measurements Of Sol Impurity Accumulation And The Implications Of Sol Flows On The Accumulation Amount, Shawn Zamperini
Collector Probe Measurements Of Sol Impurity Accumulation And The Implications Of Sol Flows On The Accumulation Amount, Shawn Zamperini
Doctoral Dissertations
A collector probe in its simplest form is a rod inserted into a plasma so that impurities are deposited onto it. These probes are then removed and analyzed to determine the deposition profile both along the length of probe and across the width of it. This dissertation covers a series of collector probes experiments and accompanying interpretive modelling all with the main goal of providing evidence for long-hypothesized near scrape-off layer (SOL) accumulation of impurities that can lead to efficient core contamination. The structure of this dissertation is as follows. A brief outline of fusion energy and why we need …
Local Dynamics And Atomic-Level Structures In Metallic Liquids And Glasses, Zengquan Wang
Local Dynamics And Atomic-Level Structures In Metallic Liquids And Glasses, Zengquan Wang
Doctoral Dissertations
Structure and dynamics at the atomic level in metallic glasses and liquids are poorly understood when compared to the crystalline solids. For instance, even though viscosity is the basic property of liquids, its atomistic origin is not well elucidated. Also, the physics of the fragility of liquids and the crossover phenomenon is far from full understanding. Earlier, through molecular dynamics (MD) simulations a direct connection was found between the timescale describing the macroscopic viscous behavior, the Maxwell relaxation time (tM = h/G∞, h is the shear viscosity and G∞ is the high-frequency shear modulus) and …