Automatic commit. Fri Sep 28 00:00:03 WST 2012

[matches/honours.git] / research / TCS / 2012-09-27 / readme

diff --git a/research/TCS/2012-09-27/readme b/research/TCS/2012-09-27/readme
index 695ca20..43b7883 100644 (file)
--- a/research/TCS/2012-09-27/readme
+++ b/research/TCS/2012-09-27/readme
@@ -30,7 +30,7 @@ Today (27th)
 # Heating Voltage (across power supply) = 1.537
 
 Changes are negligable. => The surface has changed somehow over time
- - Batteries of ammeter are also quite low though. Will replace and take new measurements.
+ - Batteries of ammeter are also quite low though. Will replace.
 
 - Curves now show 2 steep increases in current; 2 different surfaces in the beam?
   - Si was originally cleaned very well. Only 1 steep increase in graphs on 20th, although possibly part of a second
@@ -48,18 +48,29 @@ Changes are negligable. => The surface has changed somehow over time
   - Very slight shift in curve, but still clearly the same shape
 
 - Keep gun properties the same; measure TCS of stainless steel to see what curve looks like
+  - Whilst rotating sample holder, note pattern of 5 spots in a line on the Si surface
+    - Preeeetty sure they weren't there before... wtf 
+
   - Immediately note: Order of magnitude less current for stainless steel
     - But, rotating the sample holder to ~300 deg = x10 current compared to 320 deg
       - Ie: More current when sample surface is not perpendicular to axis of gun
         - ??? Beam deflected horizontally by Earth's B field?
       - Put to 320 deg; use same orientation as for Si
   - Curve looks "unfocused"; no plateau
+    - Or maybe plateau is too far to the right to see on the scale 0-17V
     - First curve looks noisy. Subsequent curve looks smoother
     - Leave for 10 mins. Curves show trend; higher max, and further to the right (higher E) as time goes on
 
  - Test for response of Stainless steel sample to large steps in DAC level.
-   - Sample shows "charging problem" ie: exponential decay on steps
+   - Sample shows "charging problem" ie: exponential decay/rise on steps
  - Repeat for Si
+   - Same effect
+ - Will see if the effect still occurs when Au is evaporated onto the surface(s)
 
+ - Try and get rid of the "double peak" increase in Si by focusing gun.
+   - Analysis suggests Vd = -0.6 is better than previously used Vd = 0.38; only one steep increase this time
+   - Will use that from now on
+   - First: Take sweeps on Si, whilst having lunch
 
-
+- Evaporate Au onto Si
+  - pressure monitored in 1416.pressure.dat