DUNE status D. Duchesneau - Context Project - Indico

DUNE status
 D. Duchesneau

  Context
  Project
 o LBNF
 o DUNE experiment
 o Schedule and TDR
  Physics
  Large scale Prototypes
  Summary

 Toulouse, September 19th , 2019
25/06/2019 D. Duchesneau / DUNE status 1

Cadre théorique: Matrice MNSP et oscillation à 3 ν
 3
 (MNSP: Maki-Nakagawa-Sakata-Pontecorvo) ν α = ∑ Uαjν j
 Formalisme de base Matrice de mélange: j=1
 Uαj est la matrice
 de mélange

 Reactor + LBL (app)
 cij= cos(θij); sij= sin(θij) + 2 phases de Majorana
 ∆mij2 L
 −i Δmij2 L
 probabilité Pνα →νβ = ∑ij U αjU β*jU α*iU βi e 2E
 ≈ sin 2 2θij sin 2 ( )
 d ’oscillation 4E
 6 paramètres accessibles:
 • 3 angles mesurés + 2 différences de masse,
 • 1 phase de violation CP encore non mesurée 2

Hiérarchie de masse des ν et violation CP

 Hiérarchie de masse: nouveaux projets
  atmosphériques (ex: Orca, HyperK)
  Réacteurs (JUNO, 20kton LSc, 60 km)
  Faisceau Long baseline ν (> 1000 km)
  US => DUNE avec TPC Argon Liquide

 Violation CP:
 quête en cours (T2K et NOvA) mais nécessite des nouveaux projets
  Faisceaux ν Long baseline (>100 km)
  US => DUNE / TPC argon liquide / 1300 km
  Japon => Water Cerenkov / 295 km (T2K => HyperK)

 Ces 2 questions peuvent être abordées avec faisceaux conventionnels en étudiant les
 oscillations → et  →  

 3

Oscillation probability in the 3 ν flavours schema with matter effect

 a = ±2 2GF N e Eν

 DUNE neutrino oscillation strategy:
 Measure neutrino spectra at 1300 km in wide-band beam
 4

international collaboration
 1106 collaborators from 184 institutions
 in 31 countries

1.2 – 2.4 MW
40 kton FD mass

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Far detector: Liquid Argon TPC technology
Homogeneous massive target and ionization detector

 Principle: 3D imaging in
 a large volume Liquid
 Argon TPC
 • very pure LAr (3.5 m)

 • UV scintillation light
 (5000 photons/mm @128
 nm) for t0
 • Primary ionization in LAr:
 1 m.i.p ~ 20000 e- on 3 mm

 •→ 3D reconstruction with
 ~1 mm resolution

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Physics milestones vs Exposure kt-MW-years
 Staging scenario with equal running in neutrino and antineutrino modes:

 • Year1(2026): 20-kt FD,1.2 MW beam
 • Year2(2027): 30-kt FD
 • Year4(2029): 40-kt FD
 • Year7(2032): 2.4 MW beam

 (sin22θ13 = 0.084 +/- 0.003)
 1° θ23 resulution (θ23 = 42°)

 MH at 5σ (worst point)

 10° resolution (δCP = 0)
 CPV at 3σ (δCP = + π/2)

 CPV at 5σ (δCP = + π/2)
 CPV at 3σ (δCP = - π/2)

 CPV at 5σ (δCP = - π/2)

 Reactor θ13 resolution

 CPV at 3σ 75% of δCP
 CPV at 5σ 50% of δCP

 (US P5 requirement)
 45 60 100 210 230 290 320 550 850
2 years 5 years Exposure [kt-MW-years]
 3 years 7 years 10 years

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Observation of early time
 development yields sensitivity to
 neutrino mass ordering and
 details of SNB model.

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PROTOTYPING

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ProtoDUNEs at CERN Two LAr TPC technology foreseen for DUNE far detector modules

Prototypes to validate:
• Technological characteristics ProtoDUNE-DP
• Production and installation procedures
• Design and performance
Demonstrate long-term operation stability

 ProtoDUNE-SP

 EHN1 building
 The feasibility of both technologies at large scale is being tested with the ProtoDUNE detectors
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ProtoDUNE-SP Exposed to H4 (SP) testbeam at CERN,
 momentum-dependent beam composition contains , ±, , , ±

 First test beam data took in Sep-Dec 2018

 ProtoDUNE
 SP@CERN
 6.9mx7.2mx6m
 Active volume

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ProtoDUNE-DP (NP02) Dual phase:
Components and operating conditions Electronics C 5 mm

 15 mm
 R
 P
 5 mm

 Charge Readout Planes (CRP)

 6m Field Cage

 Cathode -300 kV: 6m drift => drift time = 3.7 µs
 Electron lifetime goal at 7 ms
 (corresponding to 40 ppb of impurities)

 Ground grid
 6m
 6m
 Photomultipliers
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Detector contributions from french institutes: APC, IPNL, LAPP, CEA
 CRPs

 CRPs

 Cryogenic FE electronics and DAQ

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Summary: In nearly 1 year time: From an empty cryostat to a fully integrated detector

 Charge
 Readout
 Planes (CRP)

 Field Cage

 Cathode
Nov. 2017
 Ground grid
 23/02/2019
 27/02/2019
 Photomultipliers

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ProtoDUNE-DP final installation and cryostat closure Manhole plug installation
June 13th 2019
Last checks before closing
 HV
 extender

 Field
 cage

 CRP

 Manhole
 cathode
 Ground
 grid

 PMT

 The extraction of one of the
 Camera view
 last 2 persons from the cryostat

 Pressure test at 200 mbar was done
 to verify the cryostat deformation =>
 in the expected range
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Cryostat Filling: 760 tons of LAr

 From 6/07 to 9/08:
 • 38 trucks of 20 tons
 • 40cm/day

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ProtoDUNE-DP Detector commissioning started immediately: after several weeks of adjustements and work with cryo team
Charge Readout Planes and electronics : cosmic tracks recorded in Dual Phase mode
 µ decay candidate
 Gallery of tracks (13/9)
 CRP1 view 1 (random trigger, 400 us
 CRP2 view 0 lifetime)
 CRP2 view 0

 LAr Purity evolution with time

 Zoom on same
 CRP2 view 0 CRP2 view 1 track details
 observed from
 the two
 CRP1 view 0 CRP1 view 1 perpendicular
 views

 Cryogenic intervention with
 recirculation in the filter stopped

Photon system
 • 36 8” cryogenic PMTs fully characterized
 • Wavelength-shifter: PEN / TPB coating on PMT
 • Voltage divider base + single HV-signal cable + ext. splitter
 • Light calibration system: LED & fiber based
 • DAQ system (external)

 First electrolumniscence signals (S1 + S2)
• Data taken: GAr, LAr filling, LAr full • Data under different detector conditions (drift,
 volume in different field conditions amplification, extraction) being analyzed
• All PMTs are operative • All PMTs see S2 electroluminescence signals
• Low noise:

DUNE Planning Milestones
  July 2017: DUNE Far Site Ground breaking
 – Start of the two DUNE FD cavern construction
  2018 – 2022: ProtoDUNE SP and DP at CERN including a phase 2
  Late 2019: DUNE FD TDR approved
 • Early 2020: DUNE International project baseline
 – Finalize various milestones, including the LBNF
 • Aug. 2024 – May 2025: 1st 10 kt FD Installation
 • Aug. 2025 – May 2026: 2nd 10 kt FD Installation
 • ~2027: ND/LBNF beam Ready

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Thank You

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