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.
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Showing 1 to 20 of 47 for “"Detector response"”.
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Investigation of the bubble detector response to high LET space radiation
… particles. A special type of superheated droplet detectors referred to as space bubble detectors (SBD) have been used to evaluate the equivalent dose due to neutrons in various space missions aboard the International Space Station. Protons and other heavy charged particles are a significant …
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Study of LaBr3 (Ce) detector response to high energy helium ions
… devices. Lanthanum Bromide scintillator detector (LaBe3: Ce) has been successfully used as a gamma spectrometer inside space crafts. However, data on its response to other particles such as charged particles remains limited. From a radiation protection perspective, it is important to …
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The determination of the helium discharge detector response to fixed gases
The Beckman Helium Discharge Detector has been found to be sensitive to the fixed gases oxygen, nitrogen, and hydrogen at detection levels 10-100 times more sensitive than possible with a Bow-Mac Thermal Conductivity Detector. Detection levels o~ approximately 1.9 E-4 ~ v/v oxygen, 3.1 E-4 ~ v/v …
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Optimization of detector response simulations for multiple particles created by neutron-induced reactions
… system, and studies the optimization of detector response simulations for multiple particles created by neutron-induced reactions. Neutron Activation Analysis (NAA) method was used to investigate the influence of the trace element, chlorine, in the biological system of the human body using …
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Development of a Novel Detector Response Formulation and Algorithm in RAPID and its Benchmarking
… solving such problems. In this dissertation, the Detector Response Function (DRF) methodology is proposed and developed for real-time and accurate radiation shielding calculation. The real-time capability of solving radiation shielding problem is very important for: (1) Safety and monitoring of …
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Constraining Beam Backgrounds and Analyzing the Detector Response in a Test Beam With the Nova Experiment
… experiment with two functionallyidentical detectors with the Near Detector at Fermilab, Illinois, and the Far Detector at Ash River, Minnesota. NOvA measures the rate of muon neutrino disappearance and electron neutrino appearance using muon neutrinos generated by the NuMI beam from the …
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A novel method for modeling the neutron Time of Flight (nTOF) detector response in current mode to inertial confinement fusion experiments
… all incorporate neutron time of flight (nTOF) detectors which measure neutron yield, and the shapes of the waveforms from these detectors contain germane information about the plasma conditions that produce the neutrons. However, the signals can also be clouded' by a certain fraction of …
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Characterization and optimization of signal and background for the time-resolving magnetic recoil spectrometer on the National Ignition Facility
… signal and background distributions at the MRSt detector must be characterized; the detector response to the signal and background must be determined; and the shielding enclosing MRSt must be designed and implemented to reduce the background to the required level. These things have been done, …
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Simulation studies for a high resolution time projection chamber at the international linear collider
… this high accuracy, the requirements for the detector performance are challenging. Several detector concepts are currently under study. The understanding of the detector and its performance will be crucial to extract the desired physics results from the data. To optimise the detector design, …
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Probing Power-Absorbing Structures at Near-Infrared Wavelengths using Energy Absorption Interferometry
… capable of fully characterizing the optical response of single-mode, few-mode and multi- mode power-absorbing structures, such as near-infrared detectors. A detector’s output can be written as the full spatial contraction of the external field correlation tensor and detector response …
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Design of a neutron calibration source for the SNO+ experiment
SNO+ is a multipurpose detector situated at the SNOLAB facility located at Creighton mine 2 km deep. The SNO+ experiment will have three phases: water, pure scintillator and Te-loaded scintillator. With the detector filled with scintillator, solar neutrinos, geo and reactor anti-neutrinos, and …
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Gas chromatographic studies of drugs of abuse
… samples. 2. For many of the drugs studied the detector response curves are not linear with sample concentration but the calibration curves are reproducible if care is exercised. This makes quantitative analysis feasible down to 50-100 nanogram levels with proper technique. 3. Long column life …
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Karlsruhe Tritium Experiment: Detector System Commissioning and In-Situ PIN-Diode Array Dead-Layer Measurement
… resolution, but a confluence of focal plane detector parameters contribute to the uncertainty in the measured neutrino mass including the detector backgrounds and the detector electron response function. The detector system group developed a figure of demerit, <italic>F</italic>, to quantify …
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Measurement of top-antitop differential cross sections in the di-lepton channel with ATLAS in p-p collisions at 7TeV
… collision data collected by the ATLAS detector at the Large Hadron Collider. This data corresponds to an integrated luminosity of \lumitot. Events with top quark pair signatures are selected in the di-lepton channel. The reconstructed differential distributions are subtracted with …
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The gas chromatography of ammonia : heterogeneous systems containing silver ammines
… pressure of the complex. Calibration of the detector response to ammonia enabled the dissociation pressures of the complexes to be computed from the plateau heights. Certain silver salt-solvent systems gave chromatograms, whose plateaux showed decay of the rear-end, or whose heights divided …
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Study of Michel spectrum of tau decay
… to assess the impact of the uncertainties in the detector response function on the measurement of the ratio Br... My conclusion is that the three efficiency uncertainties equally have the greatest effect on the measurement of the number of events. The energy offset affects the measurement of Br... …
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Evaluation of a micro-adsorption detector in liquid and gas chromatography
… objectives: 1. Evaluation of a micro-adsorption detector for use in liquid chromatography. 2. Evaluation of a micro-adsorption detector for use in gas ch.ranatography. 3. Investigation of the micro-adsorption cell as a tool for screening chromatographic systems, in adsorption studies, and as a …
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Characterization of the Acquisition Parameters of a Submersible Gamma-Ray Computed Tomography System
… calculations that use the Beer-Lambert law and detector response characteristics. It shows that both results qualitatively agree with the analog result and can cut computational costs by several orders of magnitude. The second section of this study presents a novel approach for differentiating …
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Modeling and characterization of a monoenergetic gamma-ray imaging system for active interrogation applications
… and full-scale cargo containers. Radiation detectors specifically targeted for imaging in this high-intensity environment are optimized and characterized, Cherenkov-based quartz detectors and LYSO scintillating detectors are used in the final imaging system. Imaging simulations include fully …
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Investigation of heavy ion reaction mechanisms by means of the inclusive 93Nb(12C,7Be) and 93Nb(12C,9Be) reactions
… for the mass and charge dependance of the NaI E detectors was employed to calibrate the NaI(TI) detectors. The model is outlined and it is shown that the nonlinearity of the detector response is only due to a term which describes the mass-dependance. Investigation of the cross-sections revealed …
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