M.S. (Master of Science)
Department of Physics
Electron beam halos defined as the peripheral fraction of the beam that does not contribute to the front end application. Particles located in the halo can cause damage to the particle accelerator and lower the power and quality of the beam. Being able to measure the beam halo could provide insight on the halo-formation mechanism and ultimately will improve the overall performance and quality of the beam. A halo diagnostic was designed, and a prototype built and commissioned. The diagnostics relies on detecting optical radiation by the electron beam and masking its core to enhance the detection of the halo. Numerical simulations using a simple ABCD ray-tracing program and a wavefront optical software were performed. The built system was characterized using a HeNe laser. A critical element of the system is a digital micromirror device (DMD) capable of dynamically masking the beam core. This work discusses the development of the halo diagnostics and presents some results from its initial commissioning using a HeNe laser system.
Marshall, Christopher James, "Development of an Electron-Beam Halo Diagnostics" (2020). Graduate Research Theses & Dissertations. 7402.
Northern Illinois University
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