Test pulses with data concentrator Kees Ligtenberg Lepcol meeting - PowerPoint PPT Presentation

Test pulses with data concentrator Kees Ligtenberg Lepcol meeting September 7, 2020 Kees Ligtenberg (Nikhef) Test pulses September 7, 2020 1 / 6

Digital test pulse Hitmap hitmap_chip8 hitmap_chip8 100 Row number 250 1600 1600 Entries Entries 96 96 Mean x Mean x 90 Mean y Mean y 96 96 Std Dev x Std Dev x 71.55 71.55 80 200 Std Dev y Std Dev y 71.55 71.55 70 60 150 50 40 100 30 50 20 10 0 0 0 50 100 150 200 250 Column number 100 test pulses per pixel, and all in data Kees Ligtenberg (Nikhef) Test pulses September 7, 2020 2 / 6

Analog test pulse Hitmap hitmap_chip8 hitmap_chip8 200 Row number 250 Entries Entries 3204 3204 Mean x Mean x 95.96 95.96 180 Mean y Mean y 95.92 95.92 71.55 71.55 Std Dev x Std Dev x 160 200 Std Dev y Std Dev y 71.55 71.55 140 120 150 100 80 100 60 50 40 20 0 0 0 50 100 150 200 250 Column number About 2 hits per test pulse (one pulse, and one after pulse), which is normal for this IKRUM setting Kees Ligtenberg (Nikhef) Test pulses September 7, 2020 3 / 6

Time over threshold of analog test pulse Time over threshold histogram tothis_chip8 tothis_chip8 Entries Entries 3204 3204 140 Mean Mean 62.92 62.92 Std Dev Std Dev 26.56 26.56 120 100 80 60 40 20 0 0 20 40 60 80 100 × Time over threshold [ 25 ns] The time over threshold should be low for this tpf, and there should be some distribution Kees Ligtenberg (Nikhef) Test pulses September 7, 2020 4 / 6

DAQ of noise Chip 8 and 9 Hitmap Hitmap × hitmap_chip8 hitmap_chip8 10 3 hitmap_chip9 hitmap_chip9 Row number Row number 250 250 7000 Entries Entries 3930830 3930830 Entries Entries 86931 86931 Mean x Mean x 33.45 33.45 Mean x Mean x 131.8 131.8 1200 Mean y Mean y 143.2 143.2 Mean y Mean y 132.6 132.6 6000 Std Dev x Std Dev x 32.79 32.79 Std Dev x 72.09 Std Dev x 72.09 200 200 Std Dev y Std Dev y 76.81 76.81 Std Dev y 72.33 Std Dev y 72.33 1000 5000 150 150 800 4000 600 3000 100 100 400 2000 50 50 200 1000 0 0 0 0 0 50 100 150 200 250 0 50 100 150 200 250 Column number Column number A strange pattern appears? Kees Ligtenberg (Nikhef) Test pulses September 7, 2020 5 / 6

ToT of noise with normal DAQ Time over threshold histogram tothis_chip8 tothis_chip8 Entries Entries 3930830 3930830 Mean Mean 29.12 29.12 60000 Std Dev Std Dev 23.88 23.88 50000 40000 30000 20000 10000 0 0 20 40 60 80 100 × Time over threshold [ 25 ns] Kees Ligtenberg (Nikhef) Test pulses September 7, 2020 6 / 6