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 20 of 83 for “"beam energy"”.
-
Investigation of W-Beam Energy-Absorbing Guardrail End Terminal Safety Performance Using Finite Element Modeling
… (FE) model of the ET-Plus, a commonly used energy-absorbing guardrail end terminal; 2) to examine the conditions of in-service end terminals, and to evaluate the performance of the damaged relative to undamaged end terminals in simulated impacts; 3) to investigate both full-body and body …
-
Measurement of inclusive Lambda / Antilambda hyperon polarisation in proton nucleus collisions at 920 GeV proton beam energy
… HERA-B detector at HERA, DESY, using the proton beam of 920 GeV energy to collide with fixed target wires of different materials. A sample of approximately 2900 Lambdas was obtained in a kinematical region of transverse momentum p_t in [0.2,2.2] GeV/c and Feynman variable x_F in [-0.19,0.03] and …
-
An excitation function of particle production at the AGS
… The measurements have been made as a function of beam energy, at kinetic beam energies in the laboratory of 2 and 4 A· Ge V, by experiment E866, and of 6 and 8 A-GeV, by experiment E917. The data has been divided into event classes, based on the total multiplicity in an event. The particles were …
-
Energy Dependence of Transverse Momentum Correlations and an Exploration of the Color String Percolation Model in AuAu Collisions
… Heavy Ion Collider (RHIC) conducted a two year beam energy
-
Dipole bands in 195BI and 197BI nuclei
… 181Ta(22Ne,6n) reactions respectively, both at a beam energy of 125 Mev.
-
Penumbral Distributions For High-energy Radiotherapy Photon Beams: Experimental And Theoretical Determinations
… exist in the penumbral region of high-energy radiotherapy units namely, the photon-fluence and the dose distributions. The difference between these two distributions is associated with the lateral spread of the second electrons and is strongly dependent on the beam energy and electron …
-
Vliv výběru typu a energie fotonového svazku na ozařovací plán při zevní radioterapii karcinomu děložního hrdla
… thesis deals with the influence of photon beam energy selection on the quality of radiotherapy treatment plans for cervical cancer. The aim of the thesis was to compare the dosimetric characteristics of treatment plans created using different photon beam energies. A total of 40 patients …
-
Radio frequency driven direct current electron beam source
A new type of electron beam source employing ion-induced secondary electron emission from cold cathodes is developed for feature charge neutralization during plasma etching. A low pressure (approximately 2 – 20 mTorr) inductively coupled plasma provides ions which impinge on a high secondary …
-
Validation of Neutrino Energy Estimation Using Electron Scattering Data
… the knowledge of the initial neutrino energy is required. This energy cannot be determined directly because neutrino beams have a broad energy distribution. Instead, the initial energy for each event is estimated from the final state particles of a neutrino-nucleus interaction using two …
-
The centrality dependence of thermal parameters in Pb-Pb collisions at 158 GeV/nucleon
… to Pb+Pb CERN SPS collision data at a beam energy of 158 GeV/nucleon. The centrality dependence of the freeze-out parameters, characterizing both the hadron multiplicities and the transverse momentum spectra, are determined. This privides valuable information on the effect of the system …
-
Measurement of the Beam Asymmetry for the ETA and ETA Prime Mesons with the Gluex Experiment
… GlueX features a linearly-polarized photon beam incident on a liquid hydrogen target and a nearly-four-pi hermetic detector capable of measuring positions and momenta of both charged and neutral final state particles generated in the target. The short-term physics goals of GlueX are to …
-
The final 20 layer prototype for the AMS transition radiation detector : beamtests, data analysis, MC-studies
… in this thesis, was subjected to 2 high energy beamtests at CERN test facilities (X7,H6) in summer 2000, where more than 3 million events of p+,e-,pi- and mu- data with beam energies up to 250 GeV have been recorded. The data analysis is based solely on single track events. These are …
-
NUCLEAR COLLECTIVE MODES AT FINITE TEMPERATURE AS A PROBE OF NUCLEAR STRUCTURE AND DYNAMICS
… a configuration which minimizes the potential energy of the system. The hindrance of isospin-forbidden GDR gamma decay from a self-conjugate CN is due to a partial restoration of isospin symmetry at high nuclear temperature, since the excited compound-nucleus lifetime is too short for the …
-
Robust and efficient process for acceptance testing of radiation therapy machines
… and that EPID can be used for correlating beam energy changes, 2) show that AT of a linac can be automated and can be performed using EPID as the measurement tool, and 3) compare the current paradigm of AT to the new EPID-based AT approach by performing a failure mode effects analysis …
-
13 to 27 MeV helium-3 elastic scattering from several light nuclei
… 27Al targets have been bombarded with the 3He beam from the University of Illinois cyclotron. Elastic scattering angular distributions have been obtained in the approximate beam energy range of 13 to 27 MeV in steps of about 2 MeV and in the angular range SO to 1500 (lab.). The data were …
-
Reduction of Line Edge Roughness in Semiconductor Photoresist by Means of a Grazing Incidence Ion Beam
… on one such method employing the use of an ion beam at grazing incidence along the features. This method smooths relatively long spatial length LER, a potential advantage over other smoothing techniques that focus on just molecular scale LER. LER reduction numbers Variables include beam energy …
-
The effect of high dose rate on tissue equivalent proportional counter measurements in mixed neutron-gamma fields
… This study describes the measurement of lineal energy spectra carried out with a 5.1 cm (2 inch) diameter spherical TEPC simulating a 2 μm diameter tissue site in low energy (33 – 330 keV neutrons) mixed photon-neutron fields with varying dose rates generated by the McMaster University 1.25 MV …
-
Precision measurement of the weak charge of the proton and parity violation in the N → ∆ transition
… GeV 180 μA longitudinally polarized electron beam scattering off the unpolarized photons in the liquid hydrogen target, a value of Q<sub>w</sub><sup>p</sup> (PVES) = 0.0719 ± 0.0045 was determined. The Standard Model has a definite prediction of Q<sub>w</sub><sup>p</sup> (SM) = 0.0708 ± …
-
Electrochemistry of room temperature ionic Liquids with applications to electrospray propulsion
… in space-based micropropulsion, focused ion beam, energy storage, and other research and industrial applications. As a family of concentrated electrolytes, RTIL electrochemical properties deviate from classical theories whose mean-field approach glossed over effects arising from the …
-
Target Design and Optimizations for Spent Fuel Transmutation
… thesis examines the feasibility of using proton beams to transmute LLFPs into shorterlived or stable isotopes. While long-term storage for high-level waste would still be necessary, transmuting the LLFPs can reduce the volume of waste material that needs to be stored. The objectives of this …
Page 1 of 5