Frontemare di Trieste
Istituto Nazionale di Fisica Nucleare
Sezione di Trieste

Noise Run Analysis - Part 1

General Information (11 September 2008)

During this run the ZS threshold was set to 3.0σ. Some noisy SINTEF ladders OFF.

RUNTrigger SequenceTrigger ModeFrequencyEvents
58151L2aBC4000 Hz2214
58148L2aBC40 Hz2014
58150L2aBC400 Hz2073

The reconstruction was performed with AliRoot v4-14-Release. The official OCDB files were used from AliEn. These files were produced from previous calibration runs.

The analysis of the SSD clusters revealed that we have the following number of golden clusters over all the events for the two runs:

RUNLayer 5Layer 6
581511652755
5814817681
5815010596

The OCDB files that were used for the reconstruction of these noise runs come from the run number 58141.

BadChannels-Run58141.gif

Results from the run 58148

The strip occupancy distribution improved considerably:

Run 58148 (some ladders off)Run 57977 (ladders on)
strip_occ_10sep_r58148.pngstrip_occ_9sep_r57977.png
Frequency that a strip fired for all the modules per event
40HZRun.gif\

The line shows the expected level for the ZS threshold used.

Number of clusters per module/number of events
Run58148-ClusterMap.gif\

Results from the run 58150

Frequency that a strip fired for all the modules per event
400HZRun.gif\

The line shows the expected level for the ZS threshold used.

Number of clusters per module/number of events
Run58150-ClusterMap.gif\

Results from the run 58151

Frequency that a strip fired for all the modules per event
4000HZRun.gif\

The line shows the expected level for the ZS threshold used.

Number of clusters per module/number of events
Run58151-ClusterMap.gif\

General Information (18th September 2008)

During this run the ZS threshold was set to 3.0σ. The run was taken with the updated timing settings as well as with the bad channel list created on the 17th of September (the newest version of this list).

RUNTrigger SequenceTrigger ModeFrequencyEvents
59951L2aBC233 Hz8388
59949L2aBC40 Hz8249

The reconstruction was performed with AliRoot v4-15-Release. The official OCDB files were used from AliEn. These files were produced from previous calibration runs.

The analysis of the SSD clusters revealed that we have the following number of golden clusters over all the events for the two runs:

RUNLayer 5Layer 6
599511182220
599491198422

The OCDB files that were used for the reconstruction of these noise runs come from the run number 59943.

Run59943-BadChannels.gif

Results from the run 59949

Number of clusters per module/number of events
Run59949-ClusterMap.gif\
Module ID
Run59949-ModuleId.gif\
Cluster size
Run59949-ClusterSize.gif\

Results from the run 59951

Number of clusters per module/number of events
Run59951-ClusterMap.gif\
Module ID
Run59951-ModuleId.gif\
Cluster size
Run59951-ClusterSize.gif\

General Information (23rd September 2008)

During this run the ZS threshold was set to 3.0σ.

RUNTrigger SequenceTrigger ModeFrequencyEvents
60438L2aBC233 Hz8322
60437L2aBC40 Hz8191

The reconstruction was performed with AliRoot v4-15-Release. The official OCDB files were used from AliEn. These files were produced from previous calibration runs.

The analysis of the SSD clusters revealed that we have the following number of golden clusters over all the events for the two runs:

RUNLayer 5 (No 5σ cut)Layer 6 (No 5σ cut)Layer 5 (With 5σ cut)Layer 6 (With 5σ cut)
604385357545941
604374717140029

The OCDB files that were used for the reconstruction of these noise runs come from the run number 60433.

Run60433-BadChannels.gif

Results from the run 60437

Run60437-ClusterMap-New.gif\
Number of clusters per module/number of events (1st row without and 2nd with the 5σ cut)
Run60437-ClusterMap.gif\
Run60437-ModuleId-New.gif\
Module ID (1st row without and 2nd with the 5σ cut)
Run60437-ModuleId.gif\
Run60437-ClusterSize-New.gif\
Cluster size (1st row without and 2nd with the 5σ cut)
Run60437-ClusterSize.gif\

Results from the run 60438

Run60438-ClusterMap-New.gif\
Number of clusters per module/number of events (1st row without and 2nd with the 5σ cut)
Run60438-ClusterMap.gif\
Run60438-ModuleId-New.gif\
Module ID (1st row without and 2nd with the 5σ cut)
Run60438-ModuleId.gif\
Run60438-ClusterSize-New.gif\
Cluster size (1st row without and 2nd with the 5σ cut)
Run60438-ClusterSize.gif\

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