Nov. 19 , 2018 1 Introduction Dynamic Range Goal: Find the - - PowerPoint PPT Presentation

Maritza Delgado, Alexander Himmel, Deywis Moreno.

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• Nov. 19 , 2018

Introduction

Goal: Find the maximum number of true photons with different time windows and quantum efficiency.

• Data

generated by module SPCounter_module.cc, based

• n

SimPhotonCounter_module.cc.

• Sample: Beam Neutrinos

prodgenie_nu_dune10kt_1x2x6_323_20171227T183346_merged1.root

• The first step was to identify the maximum number of true photons by each

Optical Detector per event from PhotonsLite.

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Dynamic Range

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• The second step was to do each histogram of maximum number of true

photons, considering:

• Different time Windows:

+ 1ns + 6ns + 12ns + 1µs + 3µs

• The scale factors calculation with the quantum efficiency of each

effective detector areas of 15, 30, 45, and 60 cm2.

• The third step was to determine the maximum number of true photons in

the scale ADC (10 ADC/PE).

• The last step was to identify 99% of the events, and fraction of saturated

events.

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Area (cm2) QE QE/4 /0.03 15 0,01063 0,088583 30 0,021231 0,176925 45 0,031847 0,265392 60 0,042462 0,35385

*One Optical Detector have 4 Channels. *0.03 is the ScintPreScale parameter

The scale factor was determined using the effective detector areas and QE values.

https://indico.fnal.gov/event/16848/contribution/4/material/slides/0.pdf

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TIME 1ns 6ns 12 ns 1µs 3µs Maximum Photons (ADC) 11563 66600 95000 228000 332500 Max Photons 99% (ADC) 1562 9000 12500 30000 43750

99% (3µs)

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TIME 1ns 6ns 12 ns 1µs 3µs Maximum Photons (ADC) 23125 133000 185000 456000 647500 Max Photons 99% (ADC) 3125 17500 25000 60000 87500

99% (3µs)

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TIME 1ns 6ns 12 ns 1µs 3µs Maximum Photons 35150 199500 277500 678000 971250 Max Photons 99% 4625 26250 37500 92500 131250

99% (3µs)

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TIME 1ns 6ns 12 ns 1µs 3µs Maximum Photons (ADC) 45950 266000 370000 906500 1295000 Max Photons 99% (ADC) 6250 35000 50000 123500 175000

99% (3µs)

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1ns 6ns 12ns 1us 3us >12bits 0.2% 3.3% 6% 19% 23% >14bits 0% 0.3% 0.5% 2.5% 5% >16bits 0% 0.06% 0.06% 0.3% 0.3% >18bits 0% 0% 0% 0% 0.06%

12bits= 4096 14 bits = 16384 16 bits = 65536 18bits = 262144

Saturated events

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12bits= 4096 14 bits = 16384 16 bits = 65536 18bits = 262144

1ns 6ns 12ns 1us 3us >12bits 0.4% 10% 13% 28% 34% >14bits 0.06% 1% 2% 8% 13.4% >16bits 0% 0.06% 0.2% 1% 1.8% >18bits 0% 0% 0% 0.06% 0.1% Saturated events

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12bits= 4096 14 bits = 16384 16 bits = 65536 18bits = 262144

1ns 6ns 12ns 1us 3us >12bits 1.3% 15% 20% 38% 42% >14bits 0.06% 2.2% 4% 14% 19% >16bits 0% 0.18% 0.3% 1.9% 3.3% >18bits 0% 0% 0.06% 0.1% 0.3% Saturated events

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12bits= 4096 14 bits = 16384 16 bits = 65536 18bits = 262144

1ns 6ns 12ns 1us 3us >12bits 1.8% 19.4% 24% 42.2% 48.5% >14bits 0.2% 3.5% 6.2% 18.8% 23.4% >16bits 0% 0.3% 0.5% 2.8% 5.2% >18bits 0% 0% 0.06% 0.3% 0.35% Saturated events

Conclusions.

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+ It is important to analyze how many true photons arrive at the optical detector in different time windows, and to control a possible saturation of the electronics. + Physics requirements: dynamic range needs to be sufficiently high that no more than 10% of events have channels which saturate. * The digitalization (6ns , 12ns) need 14 bits of dynamic range. * The integration electronics (1µs, 3µs) need 16 bits of dynamic range. + Next step is to identify if is possible reconstruct energy with saturating Channels.

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Esp Especially ly to to Al Alex ex Hi Himmel el and and Dew ewis Mor Moreno.

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0.2% Saturated events in 16 bits.