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 12 of 12 for “"neutron production"”.
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Windowless gas targets for neutron production
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1997.
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Neutron production in a spherical phantom aboard the international space station
… that pose specific health risks, are created. Neutrons are one important component of this mixed radiation field due to their high LET. Therefore, the assessment of the neutron dose contribution has become an important part of the safety and monitoring program onboard the ISS. The need to …
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Magnetic fields and ultracold neutron production: studies towards the neutron electric dipole moment experiment at TRIUMF
The existence of a non-zero neutron electric dipole moment (nEDM) confirms the theoretical models of Physics beyond the Standard Model which provide extra sources of CP violation. Based on Sakharov Criteria, CP violation is one of the main ingredients to create the baryon asymmetry in the universe. …
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Measurement of neutron production from an ¹⁸O target for the production of radioactive-ion beams at iThemba LABS
… proton beams from a cyclotron. However, neutron-induced fission gives enhanced production of neutron-rich fission fragments compared to proton-induced fission, thus there is a need to find efficient ways of producing neutrons from protons. Beryllium targets have been suggested, but …
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Benchmarking photoneutron production of Mcnpx simulations with experimental results
… reactor is the generation of a high-energy neutron flux. The neutron flux can be generated by hitting a high-Z target composed of lead, tungsten, or other elements with a high-energy proton beam; To explore the control issues arising from coupling a proton accelerator to a subcritical …
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Compact neutron sources for Nuclear Physics: from accelerator-based to laser-driven neutron beams
Pulsed neutron beams are a valuable tool in nuclear physics with applications in a wide variety of fields, including fission and fusion, astrophysics, homeland security, medicine, cultural heritage, avionics, and other industrial or research applications. Despite the potential use of neutron beams, …
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Estimation of risk associated to peripheral dose in patients undergoing radiotherapy treatment
… peripheral dose. In this work we focused on the neutron radiation generated by high energy (i.e. > 10 MV) photon radiotherapy beams given that the accurate determination of the neutron equivalent doses is still a challenging task in radiotherapy. This situation is responsible of the fact that, in …
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Design of a low enrichment, enhanced fast flux core for the Massachusetts Institute of Technology Research Reactor
… the newly proposed MIT reactor core to boost the production of fast neutrons, thus making the new core more beneficial for materials testing. The Fast Flux Trap introduces a region of fissile material surrounding a central irradiation facility which is cooled by liquid lead-bismuth eutectic. This …
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The Neutronic Design and Performance of the Indiana University Cyclotron Facility (IUCF) Low Energy Neutron Source (LENS)
Neutron scattering research is performed primarily at large-scale facilities. However, history has shown that smaller scale neutron scattering facilities can play a useful role in education and innovation while performing valuable materials research. This dissertation details the design and …
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Jet radius and rapidity dependence of azimuthal correlations in photoproduced dijets
… nb⁻¹. Events were classified by their pattern of neutron production in the Zero Degree Calorimeters as either having no neutrons on both sides (0n0n) or at least one neutron opposite the direction of the photon (0nXn). For jets of radius 0.4, ⟨cos(2φ)⟩ was found to be positive and independent of …
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Modification and Numerical Modelling of Dense Plasma Focus Device
… device that generates high energy particles, neutrons and X-rays through rapid compression of the plasma. The presented research investigates the modification of the DPF and use of numerical modelling to predict the neutron yield. The DPF is a 1 kJ device that uses a 1.3 uF capacitor and …
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Variable Fidelity Monte Carlo Neutron Transport: On Combining Multi-Group and Continuous Energy Representation in Monte Carlo Calculations
… investigates the feasibility of Monte Carlo (MC) neutronic calculations that combine multi-group (MG) and continuous energy (CE) representation of nuclear interaction data in different spatial regions. In general, MG MC calculations run 3-4 times faster than CE MC. Thus, it might be possible to …