Type
Text
Type
Thesis
Advisor
Rao, Triveni, Deshpande, Abhay | Weinacht, Thomas | Hobbs, John Graf, Erle
Date
2012-08-01
Keywords
Physics
Department
Department of Physics (Scientific Instrumentation
Language
en_US
Source
This work is sponsored by the Stony Brook University Graduate School in compliance with the requirements for completion of degree.
Identifier
http://hdl.handle.net/11401/71228
Publisher
The Graduate School, Stony Brook University: Stony Brook, NY.
Format
application/pdf
Abstract
This thesis will discuss the purpose, theory, and fabrication procedure of a hermetically-sealed, diamond amplified cathode capsule as well as results and progress to date. The objective of this thesis is to develop a procedure to fabricate a successful capsule, in which a successful capsule can contain at least nanotorr pressure during leak checking and hold off at least 5000 V during voltage hold off measurements. The main purpose of the capsule is to create a secondary electron emitter which acts as a high brightness, low emittance source in electron guns for accelerator systems and can be easily transported from the fabrication site to electron guns. The diamond amplified cathode capsule uses the diamond amplifier concept to overcome current problems associated with photocathodes and drive lasers for high average current accelerator systems. The capsule contains primary electrons emitted from a cathode in an insulating spacer under vacuum. The primary electrons are accelerated across the spacer by a high voltage bias into a diamond. Secondary electrons are produced and emitted from the diamond, which results in a gain of two orders of magnitude. Material selections for the capsule were carefully chosen and described. Sample preparation and fabrication procedures for both the low and high temperature were developed. Leak checking and voltage hold off measurements were used to refine the fabrication procedure. These integrity checks were also used to quantitatively define a successful capsule. Future research will be focused in improving the success rates for the integrity checks, refining the sample preparation and fabrication process, and performing an emission measurement to calculate gain. | 116 pages
Recommended Citation
Gangone, Elizabeth Michelle, "Development of a Vacuum Encapsulated, Hermetically Sealed Diamond Amplified Cathode Capsule" (2012). Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions). 434.
https://commons.library.stonybrook.edu/stony-brook-theses-and-dissertations-collection/434