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 9 of 9 for “"Ionization chambers."”.
-
Dielectric liquid ionization chambers for detecting fast neutrons
Three ionization chambers with different geometries have been constructed and filled with dielectric liquids for detection of fast neutrons. The three dielectric liquids studied were Tetramethylsilane (TMS), Tetramethylpentane (TMP), and Isooctane, which each have intrinsic properties that make …
-
Development of a Hybrid Alanine-calorimetry Absorbed-dose Standard for Linac Electron Beams
… calibrating alanine against secondary standard ionization chambers, with calibrations traceable to primary standard water calorimeter measurements in high-energy electron beams, and subsequently using alanine in low-energy electron beams to determine absorbed dose. Ionization chambers calibrated …
-
Penumbral Distributions For High-energy Radiotherapy Photon Beams: Experimental And Theoretical Determinations
… of interaction.;Specially-designed cylindrical ionization chambers of varying inside diameters were used to determine the primary penumbral dose distributions in media of varying electron density for Co-60, 6- and 31-MV x-ray beams. The results indicate that the measured penumbral dose …
-
Absolute Dose Verification in Intensity Modulated Radiation Fields
… errors associated with IMRT measurements using ionization chambers in steep dose regions. Some of these errors are due to the lack of electronic lateral equilibrium and detector position-orientation effect. These two limitations were experimentally verified and critiqued in the light of other …
-
Measuring Hanbury Brown-Twiss correlations of pions in high-energy nucleus-nucleus collisions
… of HBT correlations of like-pions, how gaseous ionization chambers used in high-energy physics to measure pion momenta detect the momentum correlations, and we determine the effect the length and time scales involved in detecting HBT have on measurements of the correlations. We also investigate …
-
Evaluation of Presage® As A 3D Dose Verification to ol In Proton Beams
… treatment plan verification are film, TLD, and ionization chambers. Such 0D and 2D dosimeters are incapable of fully registering a complete dose volume. This shortcoming has led to an interest in a robust 3D dosimeter with dosimetric accuracy matching that of traditional devices. PRESAGE®, a …
-
Conceptual Development of Remote Monitoring System for Pressurized Water Reactor Spent Fuel Dry Cask Storage Through Neutron and Gamma Transport Simulations
… design of the RMS included two fission chambers (to detect neutrons) and one ionization chamber (to detect gamma radiation) enclosed in a polyethylene box with a thin cadmium plate inside, so the sequence of layers starting from the MPC lid was: polyethylene bottom layer, cadmium plate, …
-
An ionization chamber for fission fragment analysis
… a collaborator, we are building and testing an ionization chamber to be used for the SPIDER project which will ultimately take place at the LANSCE facility at Los Alamos National Laboratory. A full spectrum of the pertinent variables dictating the functionality of the ionization chamber have …
-
Imaging Techniques for Proton Range Determination in Proton Therapy
… of the pCT detector is composed of two strip ionization chambers measuring locations and lateral profiles of the exiting beam and a multi-layer ionization chamber (MLIC) measuring the integral depth doses (IDDs), which can be translated to residual energies of the exiting proton beams. A …