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 [2023/08/18 17:59] pereira [Object scintillator setup] |
tuning_the_s800_xdt [2023/09/22 14:50] swartzj [CRDCs setup] |
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| * Use oscilloscope to look at analog signal patched out to data U4 | * Use oscilloscope to look at analog signal patched out to data U4 | ||
| - | * Check raising | + | * Check rise time and amplitude. Good signal: ~10 ns rise time; 400-500 mV amplitude |
| * Check if there are reflections (typically seen at ~300 ns after main peak) | * Check if there are reflections (typically seen at ~300 ns after main peak) | ||
| Line 91: | Line 91: | ||
| * Adjust biases so that unreacted beam are at 1/3 to 1/4 of dynamic range | * Adjust biases so that unreacted beam are at 1/3 to 1/4 of dynamic range | ||
| * Reaction product will typically be similar enough to unreacted beam particles | * Reaction product will typically be similar enough to unreacted beam particles | ||
| - | * Different particles with different energy | + | * Different particles with different energy |
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| {{: | {{: | ||
| Line 123: | Line 123: | ||
| * **[[hv bias#hv remote control|Bias]]** CRDCs | * **[[hv bias#hv remote control|Bias]]** CRDCs | ||
| * Look at anode signal on **[[electronics overview|scope]]** | * Look at anode signal on **[[electronics overview|scope]]** | ||
| - | * Patched to data-U6 on labeled connector | + | * Patched to data-U4 on labeled connector |
| * **200 – 500 mV** signals are good | * **200 – 500 mV** signals are good | ||
| * CRDC1 anode is noisier (digital noise) than CRDC2 | * CRDC1 anode is noisier (digital noise) than CRDC2 | ||
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| * 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** (see figure below), or, alternatively **S800_MEGASUMMARY.win** |
| * Spectra **crdc1.raws** and **crdc2.raws** | * Spectra **crdc1.raws** and **crdc2.raws** | ||
| - | * Each spectra | + | * Each spectrum |
| * The 224 pads are assembled along the dispersive direction | * The 224 pads are assembled along the dispersive direction | ||
| * 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 | ||
tuning_the_s800_xdt.txt · Last modified: 2023/09/22 15:15 by swartzj
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