Investigations and Applications of Field- and Photo-emitted Electron Beams from a Radio Frequency Gun

Thesis/Dissertation · Sat Aug 01 00:00:00 EDT 2015

DOI:https://doi.org/10.2172/1221339· OSTI ID:1221339

Panuganti, SriHarsha ^[1]

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1. Northern Illinois Univ., DeKalb, IL (United States)

Production of quality electron bunches using e cient 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 eld emission inside an RF gun installed at Fermilab's High Brightness Electron Source Laboratory (HBESL). Speci cally, we study and characterize second-order nonlinear photoemission from a Cesium Telluride (Cs₂Te) semiconductor photocathode, and eld emission from carbon based cathodes including diamond eld 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 lled ellipsoidal bunches and temporally shaped electron beams from the Cs₂Te photocathode.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1221339
• Report Number(s): FERMILAB-THESIS-2015-14
• Country of Publication: United States
• Language: English

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