Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 24 for “"energy response"”.
-
Design and characterization of next-generation tissue equivalent proportional counters for use in low energy neutron fields
… is composed of tissue-equivalent material. The response of a TEPC in a radiation field is characterized by two quantities: the sensitivity, defined as the ratio of the counts recorded to the measured dose equivalent, and the dose equivalent energy response, defined as the ratio of the measured …
-
Quality Assurance Testing, and Sensitivity Studies for the SNO+ Experment
… are key. Indirect background measurements and energy systematics have been studied. A quality assurance testing system was created and implemented. The system detects the oxygen contamination of liquid scintillator as an indirect measurement of radon-222 contamination from air exposure during …
-
A Bf3 Fast Neutron Dosimeter (Long Counter)
… of holes around the detector to improve the low energy response. External shields of paraffin, 3 inches thick, and boron-trioxide, 1/2 inch thick, enclose the paraffin cylinder. These shields serve to reduce the background effect and improve the high energy response. Calibration of the counter is …
-
Non-Invasive Intracranial Pressure Method and Monitor
… sites. With this being the case, the vibrational energy response of the eye due to an external source can be used to determine a correlation or draw a conclusion concerning the vibrational energy response of the brain would be. And since there is a correlation between the vibrational energies, any …
-
Understanding The Influence of Photon Energy On 6Mv Non Reference Dosimetry and Ct Dosimetry Using Tld and Osld
… work. The first objective was to evaluate the energy dependence of TLD and OSLD for non-reference measurement conditions in a radiotherapy environment. The second objective was to fully characterize the OSLD nanoDot in a CT environment, and to provide validated calibration procedures for CT …
-
The Daya Bay Reactor Neutrino Experiment
… induced by comic muons. The Daya Bay detector energy response model is also described in detail. The relative rate analysis results exclude a zero value from $sin^22theta_{13}$ with a significance of 7.7 standard deviation using 139 days of data, 28909 (205308) antineutrino candidates which …
-
The Effects of High Pressure on The Photovoltage Spectrum of Cadmium-Sulfide and Cadmium-Selenide Schottky Diodes
… a photovoltage at photon energies less than the energy gap of the semiconductor. This photovoltage is due to excitation of electrons from interface states to the conduction band of the semiconductor. A model where the interaction of the diode contact metal with the semiconductor surface gives …
-
Superconducting gamma-detectors for non-destructive analysis in nuclear safeguards
Ultra-high energy resolution superconducting gamma ray detectors operated at temperatures of 0. 1 K can improve the accuracy of non-destructive analysis of nuclear materials. These detectors offer an order of magnitude improvement in resolution over conventional high-purity germanium detectors. The …
-
PRINCESS AND THE PEA: THE IMPACT OF ROUGH TOPOGRAPHY ON DYNAMICS OF LARGE-SCALE SURFACE CIRCULATION PATTERNS
… include absolute velocity, eddy kinetic energy (EKE), mean kinetic energy (MKE) and the D-function to quantify shear and energy redistribution. Similarly, this research explores how subtle roughness at the ocean floor can influence the structure energetics of surface circulation. Results …
-
Assessment and optimisation of digital radiography systems for clinical use
… method and the automatic exposure control (AEC) responses. The simulated values showed good agreement with empirical data measured from images of the phantom and so provide validation of the calculation methodology. It was then possible to apply the calculation technique to imaging of tissues to …
-
Photoionization of Se Ions for the Determination of Elemental Abundances in Astrophysical Nebulae
… All ions except Se5+ were measured from the energy region of the low-lying metastable state thresholds to at least 10 eV above the ionization potential. Theoretical calculations for Se5+ indicated strong resonances above 100 eV would dominate the photoionization spectrum, therefore this …
-
Coupled Rate and Transport Equations Modeling Light Yield, Pulse Shape, and Proportionality to Energy in Electron Tracks: A Study of CsI and CsI:Tl Scintillators
… on development and testing of a scintillation response model of progressive comprehensiveness that computes emission intensity over time and space in electron tracks by solving coupled rate and transport equations describing both the movement and the linear and nonlinear interactions of the …
-
EXPERIMENTAL AND COMPUTATIONAL STUDIES OF NONLINEAR QUENCHING IN MATERIALS USED AS RADIATION DETECTORS
… in security scanning, medical imaging, and high energy physics applications depend on understanding the physical mechanisms that limit intrinsic energy resolution. Nonproportionality between electron energy response and the initial energy of a stopping electron is a significant cause of the …
-
Neutron Measurements and Reactor Antineutrino Search with the SNO+ Detector in the Water Phase
… the detector volume to calibrate the detector's energy response and its response to neutrons. The $^{241}$Am$^{9}$Be source emits a unique coincidence signal with the prompt event being a 4.4 MeV $\gamma$ and the delayed a neutron capture signal (2.2 MeV $\gamma$). A novel, minimalistic, …
-
Development and Characterization of a Fast Neutron Imaging Telescope (FNIT) for 1--20 MeV Neutrons From the Sun and Nuclear Material
… in solar physics and nuclear security. In high-energy solar physics, detecting the presence of low energy accelerated ions in the low corona is recognized as an important goal. The surest indication of the acceleration of these particles is the detection of low energy (<10 MeV) neutrons. These …
-
Controlling trace impurities in a dividing wall distillation column
… feed composition should be examined. The minimum energy controller was not tested experimentally. A steady state model with heat transfer matching the pilot data was scaled to the size of an industrial tower and used to generate a minimum energy response surface for different vapor and liquid …
-
On the Continuum-Mechanics of Nematic Elastomers
… so the thermodynamic structure rests on an energy imbalance that serves in lieu of the first and second laws of thermodynamics. We consider only nematic elastomers that are incompressible and microstructurally inextensible. In our treatment of these material constraints, we start with a …
-
Flowable Fibrous Concrete For Thin Pavement Inlays
… (CT), with the measured toughness or fracture energy response of a FFC specimen. This new type of concrete, FFC, was developed to provide a workable, flowable mixture that could be utilized to rapidly construct thin concrete pavement inlays. A full-scale demonstration project verified the …
-
Commissioning of Micro-Cube Thermoluminescent Dosimeters For Small Field Dosimetry Quality Assurance In Radiotherapy
… for element sensitivity, signal fading, dose response, and energy response.</p> <p>To test the reproducibility and accuracy of the dosimeters, they were first evaluated under a single small field beam in a simple geometric configuration, then in anthropomorphic SRS head phantoms. Agreement …
Page 1 of 2