Muon Unscripted Testing: PSI¶
Introduction¶
These are unscripted tests for PSI data and introduce background corrections. For continous sources background corrections are very important. Fitting a flat background to the data (sometimes along with a exp decay), it is possible to remove the background from the data.
Loading Data Test¶
Open Muon Analysis
On the Home tab set the instrument to PSI
The load current run button should be greyed out
Load deltat_tdc_dolly_1529.bin from the unit test data using the Browse button
Set Rebin to Fixed and enter a value of 5
You will get 4 lines that all curve upwards
If you tick the Plot raw option the data will change
Auto Background Corrections Test¶
Go to the Corrections tab
For the
Background
selectAuto
The plots will now average around 0
- The values should be (approximatley):
Forw:
19.2
Back:
93.6
Left:
104.4
Rite:
77.2
Tick the
use Raw
box and the values will changeThe new values should be similar (within 1) to before
Flat Background Corrections Test¶
Change the
Select Function
toFlat Background
The curves will be curved upwards again and the table will report an error
The Corrections tab will show a red asterisk
Go to the Home tab
Untick
Time Zero
Switch the plot from
Asymmetry
toCounts
Set the
Time Zero
to be0
The plots will now show a large peak, prior to this is only background
Using the options at the bottom of the plot, set the x range from
0.0
to1.0
Go to the Corrections tab
Change the
Start X
to0.0
, it will automatically change to0.006
Change the
End X
to just before the peak in the plotThis will fit a flat background to the data before the peak
The results should be similar to before
Manual Background Corrections Test¶
Change the plot back to
Asymmetry
Change the
Background
toManual
Untick the
Apply parameter change to all domains
Change some of the background values, but leave some as they are
Go to the Home tab
Tick the
Time Zero
boxThe plots that you changed will drift away from zero at large times
The plots that you did not change will average around zero