Development of a new Thomson parabola spectrometer for analysis of laser accelerated ions

This thesis details my work on developing a new Thomson parabola spectrometer for use at the SCARLET Laser Facility at The Ohio State University. The SCARLET laser facility is a 300 TW laser reaching peak intensities exceeding 10 21 W/cm 2 . The laser is used to study laser-matter interactions and plasma phenomena. The laser-matter interactions accelerate multiple types of particles and to understand the interactions it is necessary to have diagnostic tools to characterize the accelerated particles. In order to measure the charged particles a common device is a Thomson parabola spectrometer. A Thomson parabola spectrometer uses parallel electric and magnetic fields that are perpendicular to the incoming particles. This causes deflection of the particles based on their charge-to-mass ratio and energy. Therefore, the Thomson parabola spectrometer allows us to determine what particles are present and what their energy range is. I designed a new spectrometer to replace the existing Thomson parabola spectrometer which had problems during operation that reduced performance. Using a MATLAB code, I first modeled the performance of the new design to determine physical dimensions and field strengths that would allow for 1 MeV resolution of protons up to a maximum energy of 40 MeV. This resulted in a 5 cm long magnetic field with a field strength of 0.12 T and 10 cm electrodes with a voltage difference of 6 kV. These physical dimensions were used to create a SolidWorks model. As of this writing, the newly designed Thomson parabola spectrometer has been built and is currently being installed for use on future experiments.No embargoAcademic Major: Engineering Physic

LOW-COST REMOTE WEATHER INFORMATION SYSTEM PHASE I AND PHASE 2

Remote Weather Information Systems (RWIS) are an important part of deciding maintenance activities and scheduling. However, the cost of RWIS limits the number of systems that can be deployed. Because of the lack of power and the high power budget of commonly used systems, some locations are not suitable for RWIS even though the information would be of great value. This project focuses on the development of a low-cost, low-power RWIS that is suitable for remote locations and allows for a higher density of RWIS. The system produced under this study uses less than 10 watts of power and costs less than $10,000 for the basic system. The system has performed well in Fairbanks, Alaska, over two winters. In addition, the system has been fully integrated into the Alaska Department of Transportation and Public Facilities RWIS network.WeatherCloud Inc

A vase of catenoids

In this note we construct a vase of catenoids - a symmetric immersed minimal surface with planar and catenoid ends

A Central European Tragedy: Czechoslovakia and Her Jews Before and After Munich, 1938

Graduate Textual or Investigativ

Is Baseball Shrouded in Collusion Once More? Assessing the Likelihood that the Current State of the Free Agent Market will Lead to Antitrust Liability for Major League Baseball\u27s Owners

This Note examines how Major League Baseball’s (MLB) current free agent system is restraining trade despite the existence of the league’s non-statutory labor exemption from antitrust. The league’s players have seen their percentage share of earnings decrease even as league revenues have reached an all-time high. This reality is due to the players’ inability to “cash-in” when their market value hits its apex. Once these players enter the open market, their value has greatly deteriorated and consequently, they are unable to generate earnings commensurate with their value to the league. This Note first explores the progression of MLB’s exemption from antitrust before briefly examining the history of the sport’s reserve clause. This Note then chronicles free agency’s inception, its subsequent development, the league’s brushes with collusion over the past several decades, and how the Curt Flood Act has critically peeled back the sport’s antitrust exemption. Finally, it demonstrates how the current system of free agency is restraining trade before positing that the pursuit of antitrust litigation is the optimal measure players can turn to in order to combat the current state of the free agent market

Gasworks

The material imagination of the nineteenth century had to deal increasingly with what had previously been thought to be immaterial, or as good as, and with largely imaginary forms of material. The century was one in which the material and the immaterial entered into new and surprising alliances and exchanges, exchange becoming in the process the principal mode in which the material world was made apprehensible. Increasingly, the material world was immaterialised, with the growing dependence on invisible gases, vapours and substances, from steam (or, more strictly, water-vapour), to coal-gas, to the ether of space that provided such an indisputable and indispensable ground for nineteenth-century physics. This essay considers the ways in which gas, and in particular gaslighting, was imagined, especially in Victorian fiction. I conclude that gas became a mediate material, which connected up the global and the local, the economic and the physiological, the immediate and the mediate. As such, it provides a kind of correlative to the imaginary plasma of the novel itself, which equally arises from a curiosity about the complexity of conjunctures, with the intimate traffic of proximity and distance