Automatic commit. Thu Aug 30 20:03:12 WST 2012

[matches/honours.git] / thesis / thesis.tex

diff --git a/thesis/thesis.tex b/thesis/thesis.tex
index 3fe78e1..dadf7ac 100644 (file)
--- a/thesis/thesis.tex
+++ b/thesis/thesis.tex
@@ -299,9 +299,9 @@ I really think I should actually find plasmonic effects before writing too much
 
 \subsection{Secondary Electron Spectroscopy}
 
-Secondary Electron Spectroscopy encompasses a large group of techniques used for studying the electron spectra of surfaces and solids. In these methods a beam of primary electrons is directed at the surface of a solid. The interactions between primary electrons and the surface give rise to a flux of secondary electrons scattered from the surface. Analysis of this secondary electron flux gives information about the interaction between primary electrons and the surface.
+Secondary Electron Spectroscopy encompasses a large group of techniques used for studying the electron spectra of surfaces and solids. In these methods a beam of primary electrons is directed at the surface of a solid. The interactions between primary electrons and the surface give rise to an energy distribution of secondary electrons scattered from the surface. Analysis of this secondary electron distribution gives information about the interaction between primary electrons and the surface.
 
-\subsubsection{Electron-Surface Interactions}
+%\subsubsection{Electron-Surface Interactions}
 
 
 \subsubsection{Methods of Secondary Electron Spectroscopy}
@@ -316,11 +316,11 @@ Both Energy-resolved and Total Current methods can be performed
 
 Figure \ref{} shows a simplified schematic for the Total Current Spectroscopy experiments conducted during this study. Electrons are emitted from a cathode held at negative potential relative to the target. The electron beam is focused and accelerated onto the target by the electric field of an electron gun. A detector is used to measure the total current passing through the target.
 
-\subsubsection{Electron Optics}
 
-The electron gun used for this experiment was repurposed from an old Cathode-Ray Oscilloscope (CRO). Figure \ref{} shows a simplified diagram of the electron gun, whilst Figure \ref{} shows a photograph of the gun. 
 
+\subsubsection{Electron Optics}
 
+The electron gun used for this experiment was repurposed from an old Cathode-Ray Oscilloscope (CRO). Figure \ref{} shows a simplified diagram of the electron gun, whilst Figure \ref{} shows a photograph of the gun. 
 
 The full circuit diagram for the electron gun control circuit is shown in Appendix A.
 
@@ -333,9 +333,6 @@ The available power supplies at CAMSP only featured analogue inputs for external
 Although an external DAC/ADC box was already available for these purposes, initial tests showed that the ADCs on the box did not function. The decision was made to design and construct a custom DAC/ADC box, rather than wait up to two months for a commercial box to arrive. The design of the custom DAC/ADC box is discussed in detail in Appendix B, and the software written for the on-board microprocessor and the controlling computer are presented in Appendix C.
 
 
-
-
-
 \begin{itemize}
        \item Black-Au - 1e-2 mbar vacuum
        \item ``Shiny'' - 1e-6 / 1e-7
@@ -615,6 +612,14 @@ The requirement that the AVR Butterfly share a common ground with the controllin
 
 Although the RS-232 is relatively simple to implement, which makes it ideal for non-proprietry microprocessor applications, most modern computers no longer feature RS-232 COM ports. Although a computer with COM ports was available at CAMSP, due to the extreme unreliability of this computer, it was quickly replaced with a laptop that did not possess COM ports, and a commercial RS-232 to USB converter was used to interface with the laptop.
 
+
+
+\section*{Appendix C - Pressure Monitoring}
+
+Over time, it was noticed that the pressure in the chamber was variable. 
+
+
+
 \pagebreak
 \bibliographystyle{unsrt}
 \bibliography{thesis}