tuning_the_s800_xdt
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tuning_the_s800_xdt [2015/10/21 13:57] pereira |
tuning_the_s800_xdt [2015/10/21 16:50] pereira [Unreacted beam] |
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| * Ensure that the S800 spectrograph magnets are tuned to the right rigidity | * Ensure that the S800 spectrograph magnets are tuned to the right rigidity | ||
| - | * Verify that the beam blocker (labeled I255 Slits) in the S3 Barney | + | * Verify that the beam blocker (labeled I255 Slits) in the S3 page of Barney |
| - | * Expected " | + | * Expected " |
| * Ensure that CRAD04 (typically connected to object scintillator) is enabled with a rate limit of **20 kHz** (CRAD04 looks at E1 up FP scintillator) | * Ensure that CRAD04 (typically connected to object scintillator) is enabled with a rate limit of **20 kHz** (CRAD04 looks at E1 up FP scintillator) | ||
| Line 54: | Line 54: | ||
| * Adjust MCFD threshold: | * Adjust MCFD threshold: | ||
| + | * Open configuration file **MCFD16.tcl** in **/ | ||
| * The OBJ signal feeding this module is not patched out to data U6 | * The OBJ signal feeding this module is not patched out to data U6 | ||
| * The OBJ signal from MCFD-16 module goes to the Mesytec MTDC32 module and scaler (channel OBJ.MCFD.Scint) | * The OBJ signal from MCFD-16 module goes to the Mesytec MTDC32 module and scaler (channel OBJ.MCFD.Scint) | ||
| - | * Adjust | + | |
| + | | ||
| + | * Save new threshold in configuration file **MCFD16.tcl** | ||
| Line 111: | Line 113: | ||
| * Patched to data-U6 on labeled connector | * Patched to data-U6 on labeled connector | ||
| * **200 – 500 mV** signals are good | * **200 – 500 mV** signals are good | ||
| + | * CRDC1 anode is noisier (digital noise) than CRDC2 | ||
| * Bias CRDC1 and CRDC2. Typical starting values: | * Bias CRDC1 and CRDC2. Typical starting values: | ||
| * For He-3 @ ~130 MeV/u: CRDC1 (Anode=1120 V, Drift=1000 V); CRDC2 (Anode=1120 V; Drift=1000 V) | * For He-3 @ ~130 MeV/u: CRDC1 (Anode=1120 V, Drift=1000 V); CRDC2 (Anode=1120 V; Drift=1000 V) | ||
| Line 122: | Line 125: | ||
| * 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** 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** |
| * 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 129: | Line 132: | ||
| * 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 (the ADC for each pad saturates | + | * Adjust anode HV to bring fuzzy maximum to around 600-700 channels (saturation of each pad at ~ 1000 ch) |
| * Spectra **crdc1.anode_crdc1.tac** and **crdc2.anode_crdc2.tac** (top and middle spectra in the second column) | * Spectra **crdc1.anode_crdc1.tac** and **crdc2.anode_crdc2.tac** (top and middle spectra in the second column) | ||
| Line 145: | Line 148: | ||
| | | ||
| * Spectra **crdc1.xg** and **crdc2.xg** (bottom spectra in first and second columns) | * Spectra **crdc1.xg** and **crdc2.xg** (bottom spectra in first and second columns) | ||
| - | * It shows the position of the beam in the dispersive direction, evaluated by calculating the " | + | * It shows the position of the beam in the dispersive direction, evaluated by calculating the " |
| * Spectra **crdc1.tac** and **crdc2.tac** (bottom spectra in third and fourth columns) | * Spectra **crdc1.tac** and **crdc2.tac** (bottom spectra in third and fourth columns) | ||
| - | * They correspond to the non-dispersive position of the beam in the CRDCs. | + | * They correspond to the non-dispersive position of the beam in the CRDCs. |
| {{: | {{: | ||
| Line 155: | Line 158: | ||
| === Timing setup === | === Timing setup === | ||
| + | |||
| + | rview: | ||
| + | |||
| + | * There are three electronic " | ||
| + | * MTDC: | ||
| + | * The OBJ and XFP signals comes from the MCFD module | ||
| + | * The OBJ signal into the MCFD comes from the detector via S3 patch panel #94 (going to the target area) | ||
| + | * The XFP signal into the MCFD module comes from data-U6 patch panel #70, which is connected to the CANBERRA 454 CFD XFP output in data U6 | ||
| + | * The MTDC timing signals do not require external delay adjustments because the matching window is sufficiently wide | ||
| + | * Tennelec TACs: | ||
| + | * The OBJ and XFP signals do not go through the MCFD module | ||
| + | * The OBJ stop signal comes from data-U6 patch panel #62, which is connected to the CANBERRA 454 CFD OBJ output in data U6. The corresponding CFD input is connected to data-U6 patch panel #54 | ||
| + | |||
| + | * The XFP stop signal comes from data-U6 patch panel #70, which is connected to the CANBERRA 454 CFD OBJ output in data U6. The corresponding CFD input receives the signal via patch panel to data U1 | ||
| + | |||
| + | |||
| + | * | ||
| + | * the detector via S3 patch panel #94 (going to the target area) | ||
| + | * The XFP signal into the MCFD module comes from data-U6 patch panel #70, which is connected to the CANBERRA 454 CFD output in data U6 | ||
| + | * The MTDC timing signals do not require external delay adjustments because the matching window is sufficiently wide | ||
| + | |||
| + | |||
| + | |||
| + | * Phillips TDC: | ||
| + | * The OBJ and XFP signals do not go through the MCFD module | ||
| + | * The OBJ stop signal comes from data-U6 patch panel #67. | ||
| + | * | ||
| + | * The XFP signal into the MCFD module comes from data-U6 patch panel #70, which is connected to the CANBERRA 454 CFD output in data U6 | ||
| + | |||
| + | * The full range of the TACs and Phillips TDC is ~400 ns | ||
| + | * | ||
| * See [[http:// | * See [[http:// | ||
tuning_the_s800_xdt.txt · Last modified: 2023/09/22 15:15 by swartzj
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