Proton Calorimetry/Meetings/2021/04/28

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== Minutes for UCL Proton Calorimetry Meetings, 28th April == === Present === '''Simon Jolly''', '''Raffaella Radogna''', '''Saad Shaikh''' === [[ELogs/SaadShaikh|Saad Shaikh]] === *Met with Simon last week to take detector measurements: **Measured stack thickness and recorded sheet order for UCLH beam test. **Briefly tested cross-talk with UCLH setup – little to none observed. *Investigated source of noise "pulsing" observed during UCLH beam test, results record in [http://www.hep.ucl.ac.uk/pbt/wiki/Proton_Calorimetry/Experimental_Runs/2021/Apr22 this page]. **Pulsing largely due to external electronic noise from 50Hz mains. **CMOS sensor amplifies external noise. **Grounding detector enclosure significantly reduces noise, even in lab conditions. *Software developments: **Added argument to all plotting routines to set y-scale range. Setting to 0 sets the default range. **Added argument to averaged replay script to set the averaging rate (separate to frame rate). **Added argument to stepped replay script to choose which measurement to start from and the number of measurements to replay. Last measurement persists on screen. **Live plot and fit can now accept background and shoot-through measurements to plot calibrated data. ***Calibrated data written to file accessed by Bortfeld page on web GUI. *Completed analysis of photodiode data from [http://www.hep.ucl.ac.uk/pbt/wiki/Proton_Calorimetry/Experimental_Runs/2021/Apr15 UCLH beam test], results discussed in [http://www.hep.ucl.ac.uk/pbt/wikiData/presentations/2021/SS210428_UCLH.pptx this presentation]. **Due to signficant electronic noise, better not to do background subtraction. **Best fit results came by not performing any correction of pulsing observed from electronic noise. **Fit results similar for high and low current results. Should be able to do direct comparisons with CMOS sensor. **Wrote macro to read reference curves from UCLH. Emailed Andy asking for required x-axis offset to compare with measurements made in detector. *Will analyse CMOS sensor data for next week.

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