|
HOME
ESR
EXPERIMENTS
LABS etc
|
|
E121
E127
E132
E125
E143
laser_cooling_2021
E142
Ê128
E146
E0052
E0018
E0028
E0038
E0075
E0203_E0018
E0052_2025
|
| LIBELLE 2025 |
Not logged in |
 |
|
|
|
Message ID: 20
Entry time: Fri May 9 18:34:08 2025
|
| Author: |
Konstantin |
| Category: |
DAQ |
| Subject: |
Important diagnoses of analysis parameters |
|
|
The filling of some histograms in the go4 analysis framework is controlled by the SetParameters.C and SetConditions.C files.
The WinC conditions are applied to all histograms under the folder "Analysis/Histograms/0_Raw/Scaler"
Important note: Particularly dangerous is the "WinC" condition (Attachment 2), which tests whether an unexpected (high) number of hits was recorded in a single event. An exemplary raw spectrum of the 1MHz reference is shown in Attachment 3. In Attachment 4 the same spectrum is overlayed with two WinC conditions (red and green). While the red condition would reject every hit for further analysis, the green window would allow every recorded hit to be processed in further analysis steps.
The WinS conditions are applied to all histograms under the folder "Analysis/Histograms/3_TDC/Bins/accumulated". They define the phase interval relative to the bunching HF, within which hits are processed in the histograms under "Analysis/Histograms/4_LaserSteps"
In the SetParameters.C file the most important settings are:
|
pfRevolutionFrequency | Must coincide with the revolution frequency (Not the bunching frequency!) | |
piCSReductionFactor | Setting of the rate divider, which is applied before feeding into the VUPROM as stop trigger of the TDC channels | |
pfDwellTime | Number of laser shots accumulated within one laser step | |
piSoftwaregateLength | Defines how many common stops are used to fill "Analysis/Histograms/4_LaserSteps/signal" | |
piNOfLaserSteps | Must coincide with the number of laser steps in Medusa
|
The parameter pfRevolutionFrequency and piCSReductionFactor define the display behavior of the time-resolved spectra. If you expect to observe bunches, check them. Another indicator for an erroneous selection is that the interval of the Q-Switch (laser shot) deviates from 1/30Hz = 33ms. The corresponding histogram can be found at "Analysis/Histograms/1_Diag/QSwitch/Q_Switch_interval" |
|
|
|
|
|
|
|
|
|
|