The main objective of this thesis is to perform a study of and optimize the most direct and practical gas mixture composition inside the Radial Time Projection Chamber for the Barely-Offshell Nucleon Structure (BONuS 12) detector for use in the CLAS 12 detector in Experimental Hall B at Thomas Jefferson National Accelerator Facility (JLab). The optimization of these conditions will enhance the performance and resolution of the detector. The original BONuS 6 experiment utilized a gas composition of 80 % He and 20% Dimethyl Ether (DME). With the extensive 12 GeV energy upgrade constructed at JLab and the new BONuS 12 detector established , it is imperative that the gas composition utilized, is best suited to facilitate the experimental needs and demands. BONuS 12 is an experiment designed to measure the momentum of recoiling spectator protons down to 70 MeV/c. This technique will extract the structure function Fn 2 at large x from 0.1 up to 0.8 over a significant range in Q2 and W from the nucleon mass, with a beam energy of 11 GeV, enabling us to essentially select free neutrons.

The CEBAF Large Acceptance Spectrometer for the 12 GeV era, known as CLAS12, uses the time of flight (TOF) system to identify charged particles from scattering events between the beam and target. The TOF system is divided into two parts: The Forward time of flight system, and the Central time of flight system. These two sub-systems subtend different polar angles of the detector geometry for wide acceptance of scattered particles. Reconstruction is the service used to identify particles from the interactions between the beam and target, called as a vertex or the point where the interaction occurs. The vertex position is traced back using the tracking system and the TOF system. The resolution of the detector affects the accuracy of the reconstructed vertex location. This paper’s goal will be to develop software for validation suite for CLAS12, which will include central and forward tracking plots. Plots will be developed to check the precision of the reconstructed vertices in both the central and forward detectors. This will be done assuming a target with zero dimension at 𝑣𝑧 = 0, and an extended target of 5 cm at 𝑣𝑧 = 0. This paper will also look at the TOF resolution, and identify particles using the TOF detectors and the effect of the vertex correction on the velocity vs. momentum plots.

Ce document décrit les récents résultats expérimentaux sur la structure en spin du nucléon obtenus auprès de l'accélérateur d'électrons Thomas Jefferson National Accelerator Facility (Jefferson Lab) en Virginie. Après avoir discuté la finalité de l'étude la structure en spin du nucléon et donnés les définitions de base, nous expliquons la phénoménologie de la diffusion de leptons. Nous détaillons ensuite certaines règles de somme, un outil central pour l'étude du spin du nucléon à Jefferson Lab, puis exposons la situation expérimentale actuelle. Suivent une présentation et discussion des résultats correspondants puis un exemple de résultat de l'étude du nucléon et ses conséquences sur notre compréhension de l'interaction forte. Nous concluons ce document sur les perspectives expérimentales dans ce domaine de recherche, en particulier avec la prochaine augmentation en énergie de Jefferson Lab.

Of the questions concerning the many great minds of the European Enlightenment, the question of what constitutes right and proper government perhaps had the most enduring influence on the world stage. Both Thomas Jefferson and Immanuel Kant attempted to answer the question of what constitutes right government, in particular by basing the system upon the idea of human freedom as an inalienable right. This project is an attempt to compare the systems proposed by these two authors, as well as to critique each on its ability to protect and foster individual freedom. It is my opinion that neither manages to do what it is constructed to do, as each fails to fully protect individual freedom, and each has as part of it a component which conflicts with individual freedom.

Dissertation--Mainz, 1996. / Bibliogr. p. 363-386. Résumé en anglais.

Thesis (D. Min.)--New Orleans Baptist Theological Seminary, 1993. / Includes abstract and vita. Includes bibliographical references (leaves 228-233).

Thesis (Ph. D.)--University of Notre Dame, 2008. / Thesis directed by Michael P. Zuckert for the Department of Political Science. "April 2008." Includes bibliographical references (leaves 281-293).

Thesis (M.A.)--University of Alabama at Birmingham, 2008. / Description based on contents viewed Oct. 8, 2008; title from PDF t.p. Includes bibliographical references (p. 75-78).

Thesis (M.A.)--University of North Carolina at Wilmington, 2005. / Includes bibliographical references (leaves: [96]-99))

Title from PDF of title page (University of Missouri--Columbia, viewed on Feb 15, 2010). The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Dissertation advisor: Dr. Barbara Townsend. Vita. Includes bibliographical references.