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tuning_the_s800_xdt [2017/05/26 16:06] pereira [Timing setup] |
tuning_the_s800_xdt [2017/05/26 21:58] pereira [CRDCs setup] |
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+ | * Check **[[s800 SpecTcl|Spectcl]]** window **S800_CRDCS_EFF.win** (see figure below) to verify the efficiency of the detectors. | ||
+ | * Start a new run recording data on disk | ||
+ | * Make a gate in spectrum **ic.sum** (top right plot) to select the Z region of interest, and call it **ic** | ||
+ | * Make a summing region around the " | ||
+ | * Stop the run and rescan data from disk | ||
+ | * Compare the number of event inside the 2D summing regions with the number of events inside the **ic** gate. Typically the former are very close to the later (nearly 100% efficiency for medium/high Z) | ||
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+ | {{: | ||
==== Timing setup ==== | ==== Timing setup ==== | ||
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* If necessary, adjust delays of Phillips TDC (in principle, the TACs delays don't need to be adjusted): | * If necessary, adjust delays of Phillips TDC (in principle, the TACs delays don't need to be adjusted): | ||
- | * Using the [[S800 DAQ tools# | + | * Using the [[S800 DAQ tools# |
* Connect the XFP and/or OBJ signals going to the Phillips TDC (via cables plugged to patch #66 and #67, respectively) to the scope | * Connect the XFP and/or OBJ signals going to the Phillips TDC (via cables plugged to patch #66 and #67, respectively) to the scope | ||
- | * Adjust the TDC delays of OBJ and/or XFP with respect to the TDC start, using the delay boxes connected to the CANBERRA CFD 454 in data U6 | + | * Adjust the TDC delays of OBJ and/or XFP with respect to the TDC start using the delay boxes connected to the CANBERRA CFD 454 in data U6 (~200 ns delay is good) |
- | * Be aware that the after adjusting OBJ and XFP delays | + | * Check the corresponding ToF spectra |
* Check the efficiencies of the Phillips TDC, TACs, and MTDC for the OBJ-FP and XFP-FP ToFs: | * Check the efficiencies of the Phillips TDC, TACs, and MTDC for the OBJ-FP and XFP-FP ToFs: |