ProtoDUNE TPC data: TPC coherent noise ProtoDUNE data David Adams - - PowerPoint PPT Presentation

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ProtoDUNE TPC data: TPC coherent noise ProtoDUNE data David Adams BNL July 24, 2019 Updated 11:10 EDT History I have been studying TPC pedestals and noise Current reco Pedestal evaluated for each events using pedestal fitter Removes

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ProtoDUNE TPC data: TPC coherent noise

David Adams BNL July 24, 2019

ProtoDUNE data

Updated 11:10 EDT

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History

I have been studying TPC pedestals and noise Current reco

  • Pedestal evaluated for each events using pedestal fitter
  • Removes sticky code and fits Gaussian for each channel

– Mean is the pedestal; sigma is the noise

  • Followed by SC mitigation, tail removal, correlated noise removal

Natural to look at noise in two time domains

  • Fast noise: T < 3 ms
  • RMS of ADC minus pedestal or sigma of pedestal fit
  • Studied here
  • Slow noise: T > 3 ms
  • RMS of pedestal – mean over 1000 events
  • Shown in earlier talk

Time evolution

  • Many runs shown in previous talks
  • Have settled as run 5726 as “typical” for beam period
  • This is a cosmic run. Better for studying noise.
  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 2

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Fast noise options

Some options for evaluation fast noise (plots shown for all)

  • Sigma of pedestal fit (shown in previous talk)
  • RMS of ADC – pedestal
  • Large due to signal (cosmics, …), sticky codes (SC), tails from AC coupling
  • RMS in not-signal regions
  • Run signal finder and evaluate RMS using non-signal samples
  • Finder: threshold 30 ADC counts plus window (-10, 20) samples
  • SC mitigated: run SC mitigation before signal finding
  • Tail removed: also run exponential tail removal before signal finding
  • After correlated noise removal (new!)
  • Using both new and old signal finders

Here we look at two not-signal RMS options

  • Tail removal (including SC mitigation)
  • After correlated noise removal with internal signal finding (IROI)
  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 3

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Coherent noise

Evaluate coherent noise with contiguous samples

  • Start sum over samples until 50 are found and add entry
  • If signal is encountered, restart sum
  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 4

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New RMS calculation

Previous RMS was an average of RMS over events Now averaging squares for each event

  • So result is the same as calculating RMS over all samples in all events
  • Effect is to (properly) give higher weight to large fluctuations
  • Following plots compare old and new
  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 5

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Noise plots for run 5726

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

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APA 1

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

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Tail corrected RMS old

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

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Tail corrected RMS new

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

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Tail corrected 50-sample RMS

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 10

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IROI noise-removed RMS old

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

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IROI noise-removed RMS new

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

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IROI noise-removed 50-sample RMS

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 13

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APA 2

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

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Tail corrected RMS old

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

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Tail corrected RMS new

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

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Tail corrected 50-sample RMS

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

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IROI noise-removed RMS old

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

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IROI noise-removed RMS new

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

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IROI noise-removed 50-sample RMS

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

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APA 3

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 21

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Tail corrected RMS old

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 22

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Tail corrected RMS new

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 23

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Tail corrected 50-sample RMS

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 24

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IROI noise-removed RMS old

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 25

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IROI noise-removed RMS old

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

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IROI noise-removed 50-sample RMS

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

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APA 4

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

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Tail corrected RMS old

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

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Tail corrected RMS new

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

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Tail corrected 50-sample RMS

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 31

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IROI noise-removed RMS old

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 32

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IROI noise-removed RMS new

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 33

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IROI noise-removed 50-sample RMS

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 34

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APA 5

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

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Tail corrected RMS old

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 36

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Tail corrected RMS new

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 37

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Tail corrected 50-sample RMS

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 38

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IROI noise-removed RMS old

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 39

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IROI noise-removed RMS new

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 40

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IROI noise-removed 50-sample RMS

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 41

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APA 6

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

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Tail corrected RMS old

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

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Tail corrected RMS new

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 44

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Tail corrected 50-sample RMS

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 45

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IROI noise-removed RMS old

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 46

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IROI noise-removed RMS new

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 47

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IROI noise-removed 50-sample RMS

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 48

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Comments/conclusions

Settled on two reco stages to measure noise

  • Full correction except for CNR (correlated noise removal)
  • SC mitigated, tail removed
  • Same plus CNR

Look at single-sample and coherent noise

  • Coherent is 50 contiguous samples

Summary plots on following page

  • Sample and coherent noise noise levels are
  • 4.6 and 66 ADC count before CNR
  • 3.7 and 45 ADC count after CNR
  • With nominal calibration of 25 e, these values are
  • 115 and 1700 e before CNR
  • 90 and 1100 e after CNR
  • A few channels fall into tail in coherent plot
  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 49

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Noise summary plots

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 50

∼500 e ∼5000 e Tail

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Resolution tails

The 50-sample RMS plots have small tails

  • Due to a few channels with larger RMS
  • Following plots compare and different set of events
  • Similar problem for different channels
  • Single sample RMS is much more stable
  • Problem with pedestal evaluation, signal finder, …???
  • I will investigate
  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 51

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Events 1-999 sample RMS with CNR

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 52

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Events 1000-1999 sample RMS with CNR

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

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Events 1-999 coherent RMS with CNR

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

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Events 1000-1999 coherent RMS with CNR

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 55

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Extras

Run list Charge scale Paper

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 56

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Run list

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 57

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Data summary

Run Date GRL Comments 4644 24 Sep

  • Early run with 7 GeV beam and short tracks (short e lifetime).

4853 1 Oct

  • Noise (HV off).

5141 10 Oct 7

  • Physics. 7 GeV. First run in GRL.

5174 11 Oct 7

  • Physics. 7 GeV. Last GRL run with old ASIC offset.

5225 12 Oct 1

  • Physics. 1 GeV. Early GRL run with new ASIC offset.

5341 17 Oct 1

  • Physics. 1 GeV. 160 kV. Before replacing Heinzinger PS at 15:00

5380 17 Oct

  • Cosmics. After replacing Heinzinger PS at 15:00.

5452 23 Oct 2

  • Physics. 2 GeV.

5461 24 Oct

  • Cosmics (beam off).

5463 24 Oct

  • Cosmics. (beam off). Last cosmics before HV off on Oct 25. APA 4 missing.

5542 25 Oct

  • Pulser DAC=2. HV off.

5581 26 Oct

  • Cosmics (beam off). First cosmics after beam off on Oct 25.

Not used.

5585 26 Oct

  • Cosmics. Last cosmics before adding oil Oct 30.
  • Ind. noise falls.

5700 30 Oct

  • Cosmics (beam off). After adding oil and stabilizing HV cables.

Some planes noisy.

5726 1 Nov

  • Cosmics (beam off).

5770 2 Nov

  • Physics. 6 GeV.

5844 12 Nov

  • Physics. 1 GeV. Last run with beam (and in GRL).

5845 12 Nov

  • Cosmics. First run after beam.

Not used.

6118 10 Dec c

  • Cosmics. Begin cosmic data taking.
  • Ind. noise falls. APA 1 ped shift.

6141 11 Dec c

  • Cosmics. Last cosmic run before switching Heinzinger PS

.6157 12 Dec

  • Cosmics. First cosmic run after switching PS.

6202 14 Dec c Cosmics. 6228 18 Dec c

  • Cosmics. Last run with HV on in 2018.

6535 24 Jan

  • Cosmics. First 2019 cosmics? 7.5 ms readout. (Replaces 6350)

6872 22 Feb 1dis Cosmics. 8366 17 Jun

  • Test run taken with wire bias off and HV on.

8401 19 Jun c Cosmics. 8564 27 Jun c Cosmics.

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 58

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GRLs

Some GRLs

  • Along with symbols used on previous page
  • Beam runs
  • https://docs.google.com/spreadsheets/d/1O4o9_q8F-KynQltKDAfmco3e_s1eKItFkzZ4-g_Vls0/edit?usp=sharing
  • N = 1, 2, 7: Beam on at N GeV
  • After beam runs
  • https://docs.google.com/spreadsheets/d/1gPqQbPFoOZjDLPfPVHBfCrZz9g0IQoqWUUhFnKVx6aQ
  • c: Cosmic data
  • 1dis: CRT trigger with APA 1 grid disconnected
  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 59

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Charge scale

ADC scale

  • Results here are all at ADC scale
  • No charge calibration applied

Area scale

  • A charge calibration at area scale has been done
  • Used in default reco
  • But global rescale applied at end of dataprep for “2D deconvolution”
  • Typical protoDUNE scale is about 25 e/ADC count
  • è Noise level of 4 ADC counts is 100 e
  • Tick sum of charge in a collection pulse gives the collected charge

Height scale

  • Alternative calibration at height scale is possible
  • Height of fast pulse then gives the collected charge
  • Fast means charge collected in much less than one tick (500 ns)
  • This is the electron equivalent traditionally shown in noise plots
  • Multiply area scale by 5.58 to convert
  • 4 ADC count è 560 e

Which scale do we want for paper?

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 60

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ProtoDUNE TPC paper

Want to present noise levels in protoDUNE TPC paper

  • Some of the motivation for this and preceding talks:
  • How to evaluate the noise?

– Not-signal RMS after SC mitigation and tail removal? – And correlated noise removal? – Use new signal finder?

  • Which run or runs to use in evaluation?

– Run 5726? (cosmics during beam running) – Problem with run 6350 understood-–HV was low

  • Noise plot for paper
  • Histogram of noise level with one entry for each channel
  • Excluding or flagging bad channels
  • Separate histos for induction and collection?

– And for TPC and cryo sides?

  • D. Adams, BNL ProtoDUNE sim/reco TPC coherent noise

July 24, 2019 61