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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 46 for “"neutron beam"”.
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Neutron beam monitoring for single-event effects testing
… described in this thesis aims to develop a neutron beam monitoring system using silicon photodiodes as the detecting elements for accelerated testing of electronics against neutron-induced single event effects (SEEs). The system can measure the transmission along the neutron beam line where …
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Monte Carlo simulations of the iThemba LABS neutron beam facility
The iThemba LABS neutron beam facility is currently being used for various applications of fast neutron studies, such as measurements of fission cross sections, the biological effectiveness of high-energy neutrons, calibration of detectors used for dose monitoring in space and aircrafts, and the …
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Construction and characterization of a fission converter based epithermal neutron beam for BNCT
… converter to produce a source of epithermal neutrons suitable for BNCT. The final design, construction and characterization of a new epithermal neutron beam is presented. A high intensity source with low contamination is obtained using a fission converter driven by thermal neutrons from the …
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The Calibration of a Fission Chamber at 14 MeV: Accelerator based Neutron Beam Detection
… functionality and will be cross-calibrated for neutron detection against a known fission chamber at Ohio University. The 4-MV Tandem Van De Graaff Accelerator was used to produce a neutron beam for calibration. Initial spectra show that the chamber is functioning properly and has a high signal …
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In vitro analysis of boron-10 uptake and neutron beam design for boron neutron capture synovectomy
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1996.
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The design of an intense accelerator-based epithermal neutron beam prototype for BNCT using near-threshold reactions
Near-threshold boron neutron capture therapy (BNCT) uses proton energies only tens of keV above the (p,n) reaction threshold in lithium in order to reduce the moderation requirements of the neutron source. The goals of this research were to prove the feasibility of this near-threshold concept for …
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The Final Computational and Experimental Performance Characterization of the Washington State University Neutron Capture Therapy Facility Neutron Beam
Made available in DSpace on 2017-07-06T18:58:50Z (GMT). No. of bitstreams: 3 Sloan_Patrick_E_MS.pdf: 1273678 bytes, checksum: 95f2d08e5eb9d3a8f60f64d5de4a9287 (MD5) Sloan_Patrick_E_MS_ABS.pdf: 10663 bytes, checksum: 87674aed7fac77777dd5b15c9f3af7fd (MD5) license.txt: 4813 bytes, checksum: …
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Dosimetry with CR-39 in Tissue Equivalent Liquid for a Proton (43 MEV) Beryllium and Deuteron (25 MEV) Beryllium Neutron Beam
Made available in DSpace on 2017-07-06T18:48:50Z (GMT). No. of bitstreams: 3 Jimenez_Javier_R_MS.pdf: 26930537 bytes, checksum: 59b9118e60458ab2a317df0d9c955882 (MD5) Jimenez_Javier_R_MS_ABS.pdf: 560299 bytes, checksum: bf70a30676a505cf597db8a59a2e9dbf (MD5) license.txt: 4813 bytes, checksum: …
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Selective irradiation of the vascular endothelium
… techniques. Mice received whole-body epithermal neutron beam irradiation. Additional dose was selectively targeted to endothelial cells from the short-ranged (5-9 [mu]m) particles released from neutron capture reactions in 10B confined to the blood by incorporation into 70-90 nm-diameter …
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Radiobiology of normal rat lung in Boron Neutron Capture Therapy
Boron Neutron Capture Therapy (BNCT) is a binary cancer radiation therapy that utilizes biochemical tumor cell targeting and provides a mixed field of high and low Linear Energy Transfer (LET) radiation with differing biological effectiveness. This project investigated the radiobiology of normal …
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Measurement of fluence at the D-line fast neutron facility at iThemba LABS
Measurements of fluence were made for the neutron beams produced at the fast neutron beam facility of iThemba LABS, using an NE213 organic liquid scintillator detector and a 238U fission ionisation chamber. Neutron beams were produced by irradiating a 6 mm natural lithium target with pulsed proton …
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Determination of neutron energy spectra inside a water phantom irradiated by neutrons of energy up to ~ 64 Me V
A neutron spectrometer based on an NE230 deuterated organic liquid scintillator (25 mm diameter x 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 …
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Applications of neutron radiography & tomography
… represents the investigation and development of neutron imaging techniques as a versatile method that can be used to reveal the presence, position, size, morphology, and chemical composition of structures and materials within a sample. The underlying physics of neutron radiography and tomography …
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Differential cross section measurement for the d(n,np) reaction
… cross section for the quasielastic d(n,np) neutron-induced deuteron breakup reaction was measured as a function of incident and scattered particle energies and angles, using a liquid deuterium target at the Weapons Neutron Research (WNR) spallation neutron beam at the Los Alamos Neutron …
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A Monte Carlo calculation of neutron reflection from various curved surfaces
<p>"Plane parallel neutron beams normally incident upon the curved surface of a solid reflector are studied with the Monte Carlo method. The geometries studied are cylindrical, parabolic, and hemispherical. It is shown that when the curved surface is cylindrical, a small "focusing effect" occurs in …
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Towards measuring the relative biological effectiveness of high-energy neutrons at iThemba LABS
In space, neutrons with energies of up to several TeV are produced through the interac-tions of primary cosmic radiation with matter such as in spacecraft shielding, and in the atmospheres and regoliths of moons and planets. The development of radiation health-risk models for space exploration …
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Neutron-deuteron breakup and quasielastic scattering
… 200 MeV region is studied by impinging a pulsed neutron beam on a deuterium target at the Weapons Neutron Research facility at the Los Alamos Neutron Science Center. The scattered neutrons from the d(n,np)n reaction are detected by a wall of neutron time-of-flight scintillators, and scattered …
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Monte Carlo calculation and analysis of neutron and gamma fields at spallation neutron sources for simulating cosmic radiation
The research of the neutron induced Single Event Effect (SEE) at aircraft altitudes or at ground level are very important since the neutron radiation is able to cause serious errors or damages on electronic components and system. TheWeapons Neutron Research (WNR) facility at Los Alamos Neutron …
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The use of thermoluminescent dosimeters for In-vivo dosimetry in a fast neutron therapy beam
… for absorbed dose measurements in a p(66)/Be neutron therapy beam at the National Accelerator Centre. Chips were selected based on their reproducibility and chip individual neutron calibration factors were derived. The dose non-linearity was determined in peak 5 and peak 6 and dose …
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