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tuning_the_s800_xdt [2017/07/21 17:35]
pereira [CRDCs setup]
tuning_the_s800_xdt [2017/07/24 10:48] (current)
pereira
Line 136: Line 136:
  
       * Spectra **crdc1.raws** and **crdc2.raws** ​       * Spectra **crdc1.raws** and **crdc2.raws** ​
-          * Each spectra shows the multiple sampled ​signals from each pad  +          * Each spectra shows the pad signals ​averaged over the number of samples ​from the SCA (typically four
-          * 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).+
           * The 224 pads are assembled along the dispersive direction           * The 224 pads are assembled along the dispersive direction
           * Width of beam peak is proportional to A1900 p-acceptance in focus optics           * Width of beam peak is proportional to A1900 p-acceptance in focus optics
           * 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).
  
       * Spectra **crdc1.anode_crdc1.tac** and **crdc2.anode_crdc2.tac** ​       * Spectra **crdc1.anode_crdc1.tac** and **crdc2.anode_crdc2.tac** ​
tuning_the_s800_xdt.txt · Last modified: 2017/07/24 10:48 by pereira