Ph.D. (Doctor of Philosophy)
Department of Physics
Optics; Electron beams--Research; Electron gun--Research; Field emission cathodes--Research; Radio frequency integrated circuits--Research
Production of quality electron bunches using efficient ways of generation is a crucial aspect of accelerator technology. Radio frequency electron guns are widely used to generate and rapidly accelerate electron beams to relativistic energies. In the current work, we primarily study the charge generation processes of photoemission and field emission inside an RF gun installed at Fermilab's High Brightness Electron Source Laboratory (HBESL). Specifically, we study and characterize second-order nonlinear photoemission from a Cesium Telluride (Cs2Te) semiconductor photocathode, and field emission from carbon based cathodes including diamond field emission array (DFEA) and carbon nanotube (CNT) cathodes located in the RF gun's cavity. Finally, we discuss the application experiments conducted at the facility to produce soft x-rays via inverse Compton scattering (ICS), and to generate uniformly filled ellipsoidal bunches and temporally-shaped electron beams from the Cs 2Te photocathode.
Panuganti, Sriharsha, "Investigations and applications of field- and photo-emitted electron beams from a radio frequency gun" (2015). Graduate Research Theses & Dissertations. 3662.
Northern Illinois University
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