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 121 for “"energy spectra"”.
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Determination of energy spectra of proton therapy beams
A technique has been developed for measuring the energy spectra of high-energy proton therapy beams in situ under conditions similar to those used for radiotherapy at the South African National Accelerator Centre. The method is based on proton elastic scattering, H(p,p)H, in a thin polyethylene …
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Energy Spectra and Angular Distributions of Photoneutrons From Heavy Nuclei
Made available in DSpace on 2015-05-12T17:11:40Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 0004009.PDF: 3094579 bytes, checksum: c5ed237501d278904d763cdaad98b577 (MD5) Previous issue date: 1952
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The angular distributions and energy spectra of photoneutrons from heavy elements.
Massachusetts Institute of Technology. Dept. of Physics. Thesis. 1966. Ph.D.
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Interpretation of reflection seismic data by analysis of cumulative energy spectra
… vs. horizontal location vs. cumulative percent spectral energy. The spectra of thin-bed models display a shift to higher frequencies relative to that of the incident wavelet, a consequence of differentiation. The spectra of the transition model show a shift to lower frequencies, a result of …
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HIGH ENERGY COSMIC RAY CHARGE AND ENERGY SPECTRA MEASUREMENTS ABOVE 100 GEV/NUC
… balloon flights were conducted to measure the energy spectra of cosmic ray nuclei. A gas Cerenkov detector with different gas thresholds of 8.97, 13.12, and 17.94 GeV/nuc was employed to extend these measurements to high energies. The total collection factor for these flights is greater than …
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Experiments in turbulent soap-film flows: Marangoni shocks, frictional drag, and energy spectra
… the ``enstrophy cascade,'' for which the spectral exponent $\alpha=3$, and the ``inverse energy cascade,'' for which the spectral exponent $\alpha=5/3$. We find that the functional relation between the frictional drag $f$ and the Reynolds number Re depends on the spectral exponent: where …
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Laser-driven implosion characterization by the analysis of charged-fusion-product energy spectra
Energy spectra of charged-fusion products escaping laser-imploded deuterium-tritium filled glass microballoon targets were measured with a time-of-flight (TOF) spectrometer. The TOF spectrometer was carefully designed, constructed and calibrated to simultaneously measure alpha-particles and protons.
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Probability based models for the power draw and energy spectra of a tumbling mill
… based models for the power draw and collision energy spectra of a tumbling mill. Experiments are conducted using dry spherical glass bead charge in a laboratory scale tumbling mill, which is mounted with a torque transducer and tachometer to measure mill power. Particle tracking information …
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Measurements of Equilibrium and Time-Dependent Energy-Spectra of Beta-Rays From Californium-252 Fission Fragments
Made available in DSpace on 2014-12-11T17:26:06Z (GMT). No. of bitstreams: 1 7309970.pdf: 2438135 bytes, checksum: 5b670c76d16ced3af0420634b80b08e2 (MD5) Previous issue date: 1972
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Measurement of Time Dependent Energy Spectra of Electrons From Uranium-235 Fission Fragments for Electron Energies Below 1 Mev
Made available in DSpace on 2014-12-09T19:52:27Z (GMT). No. of bitstreams: 1 6910870.pdf: 3248783 bytes, checksum: 2a1db8c42d3da5b141924d48b90a724b (MD5) Previous issue date: 1968
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Determination of neutron energy spectra inside a water phantom irradiated by neutrons of energy up to ~ 64 Me V
… 25 mm) has been developed for measuring neutron spectra in water. The spectrometer is capable of measuring neutron energies above 5 MeV, set by the electronic threshold. An important feature of the spectrometer is that it is able to discriminate between recoiling protons that are associated with …
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Development of Lineal Energy Spectrum-Based Biological Effects Models for Protons
… for the rapid calculation of microdosimetric spectra (specifically, lineal energy) for protons. SuperTrack, a GPU-accelerated tool for calculation of microdosimetric spectra was developed and is capable of computing lineal energy spectra up to 5000x faster than using Geant4 directly. Proton …
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Experiments on turbulent flows in rough pipes: spectral scaling laws and the spectral link
… proposed theory that entails the existence of a “spectral link” between the turbulent energy spectra and the attendant turbulent mean velocity profile in a pipe flow, we establish new scaling laws for the turbulent energy spectra of pipe flows. These new scaling laws— an inner scaling law and an …
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Analysis of variable VHE gamma-ray emission from the hard spectrum blazar 1ES 1218+304
<p>This thesis is a study of the very high energy gamma-ray emission from the hard spectrum blazar 1ES 1218+304. The data were collected during the 2008/09 observing season by the VERITAS observatory, an array of four atmospheric Cherenkov telescopes in Southern Arizona. This work describes the …
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A compact neutron spectrometer for detecting neutrons produced by cosmic rays
The high energy secondary neutron fields from cosmic radiation that are found in aviation and space environments have impacts on both biological and technological systems. A compact neutron spectrometer that is safe to operate in an aviation environment and suitable for detecting these secondary …
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Alpha decay of excited states of carbon-12
… analysis of the data has yielded alpha-particle energy spectra over a wide energy range. A counter has been assembled to detect neutrons scattered by carbon nuclei in the crystal, and the measurements repeated in coincidence with these neutrons. The energy range of particle resolving power has …
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Modeling Mesoscale Eddies: the Effects of Resolution onOcean Turbulence
… including surface and depth-integrated kinetic energy, spectra, and zonally-averaged temperature, in order to establish quantitative resolution thresholds for physical fidelity. We find that while coarse-resolution simulations capture large-scale flow features, key mesoscale dynamics—including …
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