Goal

• Neutrino event selection in Dual Phase geometry for Physics TDR.

Current involvement: Christoph Alt, Dominic Brailsford, Alex Radovic, Dorota Stefan, Robert Sulej, Leigh Whitehead Speaker: Dorota Stefan (CERN/NCBJ)

1

Current work on: o New Dual Phase detector workspace. o Neutrino flux. o Noise simulation: data based model. o Neutrino simulation and reconstruction. o Prepare for training. In addition: o Update on global views for Single Phase.

Outline

2

New geometry workspace Christoph

gas phase

LAr

X

Y

Z

• The size of the 2x4 DP workspace is comparable to the size of 1x2x6 SP workspace. • Detector coordinates: X: [-809.97, 700.27] cm Y: [-401.12, 401.12] cm Z: [-100.12, 1204.12] cm Includes: LAr (liquid) + steel membrane in y and z LAr (liquid + gas) + steel membrane in x

3

Neutrino flux Dominic

Position of GENIE vertex X [cm]

Position of GENIE vertex Y [cm] Position of GENIE vertex Z [cm]

path: pnfs/dune/persistent/users/dbrailsf/flux/dune10kt_dphase_workspace4x2/gsimple/v2_8_6d/opt_03/

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n [3.7 GeV/c] + 40Ar e- [0.3 GeV/c] + n + p + p++p0

Wire

Dri

ft

LArSoft + G4

Hit finding implemented by Christoph

ne CC event in DP, example

5

Neutrino simulation

• Simulation still running. Ready: nue (1M), nu (1M), nutau(1M), to be done: anue (1M), anu (1M), anutau (1M).

• Path (up to G4 stage): Fermilab /pnfs/dune/persistent/users/dstefan/v06_53_00/g4/

CERN /eos/experiment/neutplatform/dune/mcproddisk/

• Detsim stage + hits: when the noise simulation ready.

6

Data preparation for training

• The same fiducial cut as in Single Phase FD.

• Two projections instead of three.

• Collection views only:

o Use raw waveform for hit finding

• No wrapped wires:

o Much easier to make a global view

o Hit disambiguation not needed.

• Noise model from WA105 data, after coherent noise and slow fluctuations removal.

signal/noise processing in 3x1x1 dual-phase prototype data

7

In next days, this week

1. Add realistic noise model.

2. Simulation up to the detsim stage.

3. Testing hit finding in the noisy conditions, tuning parameters of the fitting.

4. Simulation up to the reco stage.

Then:

1. Training (use similar architecture as for Single Phase? Discuss / try around physics week).

2. Make selection efficiency plots.

8

• Concatenated multi-tpc events (global view)

o not trivial for SP induction planes….

o now can handle all combinations: top-bottom APA’s, crossing APA / CPA

• ADC scaled+saturated to 1-byte/pixel, configurable downsampling in drift direction

o aim to contain ~1-2M events in main memory and likely some more on disc.

• Now move to setting up recurrent CNN to locate primary vertex

Robert

9

Data preparation for primary vertex finding (ADC based) for SP first