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tuning_the_s800_xdt [2023/09/20 13:51] swartzj |
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) | ||
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* 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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* **[[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 |