tuning_the_s800_xdt
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| Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
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tuning_the_s800_xdt [2015/10/27 16:43] pereira [FP scintillator setup] |
tuning_the_s800_xdt [2015/10/29 12:49] pereira [Timing setup] |
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| - | * Select **[[s800 SpecTcl|Spectcl]]** window **S800_IC.win** | + | * Select **[[s800 SpecTcl|Spectcl]]** window **S800_IC.win** |
| * Adjust pad gains | * Adjust pad gains | ||
| Line 126: | Line 127: | ||
| * Count rate is a little higher than on scintillator due to noise or thresholds | * Count rate is a little higher than on scintillator due to noise or thresholds | ||
| - | * Check **[[s800 SpecTcl|Spectcl]]** window **S800_CRDCS.win** (see figure below) to verify the good performance of the detectors. (The spectra for each CRDC can be checked separatelly in windows **s800_CRDC1.win** and **S800_CRDC2.win**) | + | * Check **[[s800 SpecTcl|Spectcl]]** window **S800_CRDCS.win** in directory **/ |
| * Spectra **crdc1.raws** and **crdc2.raws** (top and middle spectra in the leftmost (first) column) | * Spectra **crdc1.raws** and **crdc2.raws** (top and middle spectra in the leftmost (first) column) | ||
| Line 165: | Line 166: | ||
| * 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 | + | * 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 " |
| * 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). | + | * 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). |
| * 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 spectra should never be empty because the matching window is sufficiently wide (around 4000 ns) | * The MTDC spectra should never be empty because the matching window is sufficiently wide (around 4000 ns) | ||
| {{: | {{: | ||
| + | |||
| + | * Due to the multi-hit capability of the MTDC, we need to select the " | ||
| + | * Use the spectra **TOF.MTDC_RF**, | ||
| + | * Using the cursor mouse, check the lower and higher limits defining the region in the MTDC ToF spectra with the " | ||
| + | * Go to the **Variables** page in SpecTcl GUI and assign the limits to the following variables: | ||
| + | * s800.fp.vmetdc.mtdc_objlow and s800.fp.vmetdc.mtdc_rfhigh for RF-XFP | ||
| + | * s800.fp.vmetdc.mtdc_objlow and s800.fp.vmetdc.mtdc_rfhigh for OBJ-XFP | ||
| + | * s800.fp.vmetdc.mtdc_xfplow and s800.fp.vmetdc.mtdc_xfphigh for XFP-XFP | ||
| + | * 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: | ||
| Line 180: | Line 190: | ||
| * Adjust the TDC delays of E1 up, down using the Delay GUI | * Adjust the TDC delays of E1 up, down using the Delay GUI | ||
| * In principle, the TACs delays don't need to be adjusted | * In principle, the TACs delays don't need to be adjusted | ||
| - | |||
| ==== Checking Particle ID and rate at S800 FP ==== | ==== Checking Particle ID and rate at S800 FP ==== | ||
| Line 186: | Line 195: | ||
| * Select SpecTcl window **S800_PID.win** in directory **/ | * Select SpecTcl window **S800_PID.win** in directory **/ | ||
| * The three columns correspond to the PID determined with the **RF-FP** ToF (left), **OBJ-FP** (center), and **XFP-FP** (right) | * The three columns correspond to the PID determined with 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 PID spectra using the Phillips TDC |
| - | * The second row corresponds to the MTDC with just the first hit included | + | * The second row corresponds to PID spectra using the MTDC with __just |
| - | * The third row corresponds to the ORTEC TACs. Note that there is not **RF-FP TAC** | + | * The third row corresponds to PID spectra using the MTDC gated on the " |
| + | * The fourth row corresponds to PID spectra using the ORTEC TACs. Note that there is not **RF-FP TAC** | ||
| * You might need to adjust the limits of the spectra to get a good resolution | * You might need to adjust the limits of the spectra to get a good resolution | ||
tuning_the_s800_xdt.txt · Last modified: 2023/09/22 15:15 by swartzj
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