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tuning_the_s800_xdt [2017/04/08 13:42] pereira [Dispersion Matching Mode] |
tuning_the_s800_xdt [2017/06/17 14:37] pereira [FP scintillator setup] |
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==== FP scintillator setup ==== | ==== FP scintillator setup ==== | ||
+ | |||
+ | * Make sure that S800 DAQ is in [[s800 daq tools# | ||
* Set trigger to “s800 trigger” | * Set trigger to “s800 trigger” | ||
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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) | ||
+ | |||
+ | {{: | ||
==== Timing setup ==== | ==== Timing setup ==== | ||
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* For each ToF, SpecTcl will search the hit number that fits in the selected region. The new MTDC ToF parameters are **s800.fp.vmetdc.mtdc_rf**, | * For each ToF, SpecTcl will search the hit number that fits in the selected region. The new MTDC ToF parameters are **s800.fp.vmetdc.mtdc_rf**, | ||
- | * If necessary, adjust delays: | + | * If necessary, adjust delays |
- | * Using the [[S800 DAQ tools# | + | * Using the [[S800 DAQ tools# |
- | * Select | + | * Connect |
- | * Adjust the TDC delays of OBJ and XFP 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) |
- | * Adjust | + | * Check the corresponding ToF spectra in SpecTcl to confirm that the timings are properly |
- | * In principle, | + | |
* 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: | ||
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* Deselect experiment trigger | * Deselect experiment trigger | ||
* SAVE TO FILE | * SAVE TO FILE | ||
- | * Stop and start **[[s800 daq tools#Run Control Window|RunControl]]** to assert new trigger condition | + | * Begin a new run on [[#Readout GUI|Readout GUI]] to assert new trigger condition |
* Select **[[s800 SpecTcl|Spectcl]]** window **S800_DISPMATCH.win** | * Select **[[s800 SpecTcl|Spectcl]]** window **S800_DISPMATCH.win** |