X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=thesis%2Fappendices%2FappendixA.tex;h=43f2b86d64e840990d85997cb364b693fcbda13d;hb=1c9618e52bd8dad6a84c698967800beee8378f24;hp=1a8d089d1826e5dd36e50bc90c4712fed16cbdb0;hpb=70a96cca12cb006506461d26cd112bab179fe74c;p=matches%2Fhonours.git

diff --git a/thesis/appendices/appendixA.tex b/thesis/appendices/appendixA.tex
index 1a8d089d..43f2b86d 100644
--- a/thesis/appendices/appendixA.tex
+++ b/thesis/appendices/appendixA.tex
@@ -97,11 +97,7 @@ Ideally, the electron gun should produce a constant emission current for fixed e
 
 A measurement point was included for the total leak current through most of the gun electrodes. 
 
-\subsection{The Ammeters}
 
-An ideal ammeter has no input resistance. In reality, it is not the current that is measured, but the voltage accross a fixed input resistor. This voltage can either be amplified, or the resistance increased, for measuring a smaller current.
-
-The 602 and 610B electrometers both provide a large range of scales and amplifier settings for current measurement. Using a low scale setting increases the input impedance, which increases the potential drop accross the ammeter. However, using a large amplifier gain increases noise; hence there is a trade off. For the 602 and 610B electrometers, a significant drift (typical +5\% of scale in 10min) in the zero level was also observed at high amplifier gains, whilst low gains appeared more stable (+10\% noted after 2 days).
 
 \section{Data Aquisition and Automation}