User Tools

Site Tools


tuning_the_s800_xdt

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
Next revision Both sides next revision
tuning_the_s800_xdt [2019/03/13 21:20]
pereira
tuning_the_s800_xdt [2023/07/24 17:51]
swartzj
Line 182: Line 182:
  
   * Select SpecTcl window **S800_TOF.win**    * Select SpecTcl window **S800_TOF.win** 
-      * The three columns correspond to the **RF-FP** ToF (left), **OBJ-FP** (center), and **XFP-FP** (right) +      * The three columns correspond to the **RF-FP** ToF (left), **OBJ-FP** (center), and **XFP-FP** (right). 
-      * The first (top) row corresponds to the Phillips TDC+      * The first (top) row corresponds to the Phillips TDC.
       * The second row corresponds to the MTDC with all the hits included. Note that in a unreacted-beam setting, the first hit typically provides the "good" ToF (i.e. start and stop signals come from the same event)        * The second row corresponds to the MTDC with all the hits included. Note that in a unreacted-beam setting, the first hit typically provides the "good" ToF (i.e. start and stop signals come from the same event) 
-      * The third row corresponds to the MTDC with only the first hit +      * The third row corresponds to the MTDC with only the first hit. 
-      * The fourth row corresponds to the ORTEC TACs. Note that there is not **RF-FP TAC** +      * The fourth row corresponds to the ORTEC TACs. Note that there is not **RF-FP TAC**. 
-      * The two spectra in the fifth row corresponds to the MTDC summary spectra of OBJ-FP and XFP-FP ToFs (zoomed in). The spectra show the ToF (vertical axis) vs. hit number (horizontal axis). Note that in unreacted-beam setting, the first hit typically provides the "good" ToF (i.e. start and stop signals come from the same event). This is not the case in a reaction setting, where the rates in the XFP and OBJ detectors are much higher than in the FP SCI +      * The two spectra in the fifth row correspond to the MTDC summary spectra of OBJ-FP and XFP-FP ToFs (zoomed in). The spectra show the ToF (vertical axis) vs. hit number (horizontal axis). Note that in an unreacted-beam setting, the first hit typically provides the "good" ToF (i.e. start and stop signals come from the same event). This is not the case in a reaction setting, where the rates in the XFP and OBJ detectors are much higher than in the FP SCI 
       * An empty ToF spectrum means that either the delays are not right (and need to be adjusted) or the spectrum range is too narrow        * An empty ToF spectrum means that either the delays are not right (and need to be adjusted) or the spectrum range is too narrow 
       * The MTDC delays should never need to be adjusted because the matching window is sufficiently wide (around 4000 ns)       * The MTDC delays should never need to be adjusted because the matching window is sufficiently wide (around 4000 ns)
Line 235: Line 235:
       * 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.txt · Last modified: 2023/09/22 15:15 by swartzj