Difference between revisions of "HV adjustment"
From Hall A Wiki
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# [https://hallaweb.jlab.org/wiki/index.php/HV_calculation_base_on_Gain_Curves Calculate the desired voltages for each scintillator based on the Gain Curves.] | # [https://hallaweb.jlab.org/wiki/index.php/HV_calculation_base_on_Gain_Curves Calculate the desired voltages for each scintillator based on the Gain Curves.] | ||
# Take a measurement with the calculated voltages. | # Take a measurement with the calculated voltages. | ||
| − | # Find the ADC peaks. | + | # Find the ADC peaks ([https://hallaweb.jlab.org/wiki/index.php/Punch_Through_Points punch through] or [https://hallaweb.jlab.org/wiki/index.php/HAND_Gain_calibration_with_known_energy_deposit%2C_H%28e%2Ce%27p%29 elastic]). |
# Run this script with updated information for the included scripts. | # Run this script with updated information for the included scripts. | ||
# Apply the new voltages, and check the ADC channel. | # Apply the new voltages, and check the ADC channel. | ||
Revision as of 11:30, 17 November 2010
High Voltage adjustment software
During the summer and fall 2010, measurements of gain curves for HAND scintillators were performed in Testlab. Due to the lack of delay cables, electronic units, fastbus crates etc. The measurements were spit in groups of 12 (out of 112). Almost all measurement were done with same electronics (amplifiers, discriminators...). However, In the Hall we will be using different cables and different electronics. This can cause some disagreement with the measured gain curves.
For this reason following software was prepared. The Algorithm for using this script is following:
- Calculate the desired voltages for each scintillator based on the Gain Curves.
- Take a measurement with the calculated voltages.
- Find the ADC peaks (punch through or elastic).
- Run this script with updated information for the included scripts.
- Apply the new voltages, and check the ADC channel.
- Make additional iterations if needed
