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tuning_the_s800_xdt [2018/03/10 14:13]
pereira [FP scintillator setup]
tuning_the_s800_xdt [2019/03/13 21:22] (current)
pereira [Checking Particle ID and rate at S800 FP]
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   * Adjust MCFD threshold:   * Adjust MCFD threshold:
-      * Using the [[s800 daq tools#​Mesytec CFD gui|Mesytec CFD GUI]], open the configuration file **MCFD16.tcl** ​ in directory **/user/operations/daq/usb/Configs**+      * Using the [[s800 daq tools#​Mesytec CFD gui|Mesytec CFD GUI]], open the configuration file **MCFD16.tcl** ​ in directory **/user/s800/s800daq/Configurations**
       * The OBJ signal feeding this module is not patched out to data U6       * The OBJ signal feeding this module is not patched out to data U6
       * The OBJ signal from MCFD module goes to the Mesytec MTDC module and scaler (channel OBJ.MCFD.Scint) ​       * The OBJ signal from MCFD module goes to the Mesytec MTDC module and scaler (channel OBJ.MCFD.Scint) ​
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 {{:​wiki:​IC-raws.png?​500|IC.raw spectrum.}} {{:​wiki:​IC-raws.png?​500|IC.raw spectrum.}}
  
-        * Gains are controlled in **s800shpini.tcl** file in directory **s800/operations/daq/usb/Configs** (an example of the content of this file can be seen {{:​wiki:​s800shpini.pdf|here}}).+        * Gains are controlled in **s800shpini.tcl** file in directory **/user/s800/s800daq/Configurations** (an example of the content of this file can be seen {{:​wiki:​s800shpini.pdf|here}}).
             * First shaper is for ion chamber             * First shaper is for ion chamber
             * Typically, only coarse gains are used             * Typically, only coarse gains are used
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           * Width is narrower in match optics ​           * Width is narrower in match optics ​
           * Adjust anode HV to bring fuzzy maximum to around 600-700 channels (saturation of each pad at ~ 1000 ch)           * Adjust anode HV to bring fuzzy maximum to around 600-700 channels (saturation of each pad at ~ 1000 ch)
-          * These are good spectra to check if the pad thresholds are properly set. Thresholds are too low if you see that all pads are firing at low energies. If that's the case, increase the pad thresholds in files **s800crdcv1.tcl** and **s800crdcv2.tcl**,​ under directory **s800/operations/daq/usb/Configs** (contact device physicist for assistance, if needed).+          * These are good spectra to check if the pad thresholds are properly set. Thresholds are too low if you see that all pads are firing at low energies. If that's the case, increase the pad thresholds in files **s800crdcv1.tcl** and **s800crdcv2.tcl**,​ under directory **/user/s800/s800daq/Configurations** (contact device physicist for assistance, if needed).
  
       * Spectra **crdc1.anode_crdc1.tac** and **crdc2.anode_crdc2.tac** ​       * Spectra **crdc1.anode_crdc1.tac** and **crdc2.anode_crdc2.tac** ​
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       * Spectra **crdc1.pad_mult** and **crdc2.pad_mult** ​       * Spectra **crdc1.pad_mult** and **crdc2.pad_mult** ​
-          * They show the distribution of pad multiplicies ​(i.e. number of pads firing for each event). Typical average values are ~10-15. Significantly larger average multiplicities might indicate that the thresholds are set too low.+          * They show the distribution of pad multiplicities ​(i.e. number of pads firing for each event). Typical average values are ~10-15. Significantly larger average multiplicities might indicate that the thresholds are set too low.
  
 {{:​wiki:​CRDCS-example.png?​850|S800_CRDCS.win SpecTcl window}} {{:​wiki:​CRDCS-example.png?​850|S800_CRDCS.win SpecTcl window}}
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       * Measure the beam intensity again and calculate the average value       * Measure the beam intensity again and calculate the average value
       * In [[s800 SpecTcl|SpecTcl GUI]], click **Attach to File** and select data file **run-xxxx-xx.evt** in directory **/​user/​s800/​stagearea/​experiment/​runxxxx**,​ where xxxx stands for the run number       * In [[s800 SpecTcl|SpecTcl GUI]], click **Attach to File** and select data file **run-xxxx-xx.evt** in directory **/​user/​s800/​stagearea/​experiment/​runxxxx**,​ where xxxx stands for the run number
-      * Check the run time and live time from the corresponding scaler file in directory **/​user/​s800/​converged_daq/scalers**+      * Check the run time and live time from the corresponding scaler file in directory **/​user/​s800/​s800daq/scalers**
       * Calculate the rate and purity and compare with the value in the A1900 FP to determine the transmission       * Calculate the rate and purity and compare with the value in the A1900 FP to determine the transmission
  
tuning_the_s800_xdt.1520709193.txt.gz ยท Last modified: 2018/03/10 14:13 by pereira