Memphys megaton mass physics detector n vassilopoulos lal on behalf of memphys collaboration
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MEMPHYS MEgaton Mass PHYSics Detector N. Vassilopoulos / LAL on behalf of MEMPHYS Collaboration. without LAGUNA aspects (L.Mosca) without R&D on PMTs (J.E. Campagne) without Fréjus Site aspects (M. Russo). emphasis: software developments and MEMPHYNO prototype design. 65m. 60m.

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MEMPHYS MEgaton Mass PHYSics Detector N. Vassilopoulos / LAL on behalf of MEMPHYS Collaboration

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Memphys megaton mass physics detector n vassilopoulos lal on behalf of memphys collaboration

MEMPHYS MEgaton Mass PHYSics DetectorN. Vassilopoulos / LAL on behalf of MEMPHYS Collaboration

without LAGUNA aspects (L.Mosca)

without R&D on PMTs (J.E. Campagne)

without Fréjus Site aspects (M. Russo)

emphasis: software developments and MEMPHYNO prototype design


Memphys underground laboratory and detector

65m

60m

MEMPHYS: Underground Laboratory and Detector

  • underground water Cherenkov at Fréjus (Alps), Modane, France

  • total fiducial mass: 440 kton or 550 kton: 3 or 4 cylindrical modules 65X65 m

    • size limited by light attenuation length (λ~80m) and pressure on PMTs

    • readout : ~3 x 81k 12″ PMTs, 30% cover (# PEs = 40%cover with 20″ PMTs)

  • possibility of an additional shaft for Liquid Argon and/or liquid scintillator detector of 100kton

Laboratoire Souterrain de Modane

http://2www.apc.univ-paris7.fr/APC_CS/Experiences/MEMPHYS/

arXiv: hep-ex/0607026

Contacts: J.E. Campagne and M. Mezzetto


Memphys fr jus layout

MEMPHYS: Fréjus layout

Excavation reaches near current Lab. 2013

excavation will start

in 2008


Memphys fr jus schedule

MEMPHYS: Fréjus schedule

2007

2012

2017

2020

depends of course on LAGUNA (European decisions)

and NNN world coordination


Memphys photodetection

MEMPHYS: Photodetection

  • 12″ PMTs x ~80000 per shaft, 30% coverage  readout plan:

    • ASIC: readout integrated electronics circuit as close to detector

    • operate with a common high voltage and thus need of variable gain to equalize PMT response

    • high speed discriminator to auto trigger on single photoelectron

    • digitization of charge ADC & of time of arrival over 12 bits to provide large dynamic range and nano-second accuracy

    • digital data out: power wires

  • PMm2 R&D project: integrated circuit & complete module studies and construction

sketch of 4x4 12″ PMTs module

voltages applied through the same cable

Electronics as close as possible to PMTs


Memphys physics

MEMPHYS: Physics

  • Proton decay

  • SuperNovae neutrinos

    • core-collapse understanding, explore violent phenomena in the universe SN trigger, star formation in the early universe  Diffuse SN

  • Neutrino Astrophysics

  •  oscillation measurements with  beams

materiel taken from (see also for further details)

A. Tonazzo’s talk at NOW06:

MEMPHYS non oscillating Physics,

http://www.ba.infn.it/~now/now2006/

materiel taken from J. E. Campagne et al.,

Physics potential of the CERN-MEMPHYS

oscillation project, JHEP04(2007)003


Memphys proton decay

MEMPHYS: Proton Decay


Memphys sn rates at mton detector

MEMPHYS: SN rates at Mton detector


Memphys real time movie of shock waves effects

MEMPHYS: “real time” movie of shock waves effects

0.4 Mton, galactic SN (10kpc) for invert beta decay

Fogli et al. hep-ph/0412046


Memphys sn trigger

MEMPHYS: SN trigger


Memphys difusse sn v s

MEMPHYS: Difusse SN v’s


Cern memphys oscillation measurements with beams

CERN-MEMPHYS: Oscillation measurements with  beams

  • θ13discovery reach and sensitivity to CP Violation

CERN

Fréjus


Cern memphys oscillation measurements with beams main results

CERN-MEMPHYS: Oscillation measurements with  beams main results

βB beam’s ions/year reduced by 2:

performance is strongly depended on ion

production

  • discovery reach of sin22θ13≈ 5 x 10-3 3σ irrespectively of the actual value of δCP

  • max CP violation (for δCP = π/2, 3π/2) can be discovered at 3σ down to sin22θ13≈ 2(9) x 10-4 for βB (SPL)

  • also, ATM + SPL/βB provides sensitivity to mass hierarchy at 2σsin22θ13 >≈ 0.02-0.03


Memphys mass hierarchy from atmosperic n s

MEMPHYS: Mass Hierarchy from atmosperic n s

If D-CHOOZ finds a non zero value for sin22θ13 then a megaton water cherenkov detector can make a distinction between the two hierarchies, R. Gandhi et al., hep-phy/07071723


Memphys megaton mass physics detector n vassilopoulos lal on behalf of memphys collaboration

MEMPHYS: MC Present Status

  • Event Generator:

    • NUANCE for n beam, n Atmospheric & Proton Decay

  • Simulation (based on Geant4):

    • Interface with the OpenScientist v16r0 framework (G. Barrand/LAL-APC) provided using distribution kits including Geant4 & CLHEP & AIDA-IO implementation to RIO (also HDF5, XML)

    • 3 modes of running in the same framework:

      • Interactive Viewing, Batch processing, AIDA_ROOT analysis

    • event info from MC, primary + non-Optical photons track infos

    • hits: each PM maintain a list of arrival time of optical photons detected (i.e. photo-cathod efficiency)

transparency by J. E. Campagne


Memphys megaton mass physics detector n vassilopoulos lal on behalf of memphys collaboration

p0 2g

g

m-

p

nm(2GeV)

2km WC Geometry

10% de gČ

1% de gČ

0.1% de gČ

transparency by J. E. Campagne


Memphys megaton mass physics detector n vassilopoulos lal on behalf of memphys collaboration

nm→m-→e-

Only detected op. photons

1600ns

Interactive histogram to identify the e Michel optical photons…

transparency by J. E. Campagne

MEMPHYS v7


Memphys megaton mass physics detector n vassilopoulos lal on behalf of memphys collaboration

natmospheric (1-10GeV)

transparency by J. E. Campagne

MEMPHYS v7


Memphys megaton mass physics detector n vassilopoulos lal on behalf of memphys collaboration

MEMPHYS: Simulation Studies for a small scale Prototype MEMPHYNOThomas Patzak, Eddy Richard, Alessandra Tonazzo / APC-PARISJean-Eric Campagne, Nikos Vassilopoulos / LAL-ORSAY

  • tests with radioactive sources (monoenergetic, point-like) and cosmic muons (direction selected with hodoscope) on surface

  • measure background level @ underground site

  • MEMPHYS simulation & visualization code

  • 2x2x2m³ water volume

  • 2 different PMTs’ modules simulated at bottom side :

    4x4 12in PMTs = ~35% coverage (for one side

  • purposes :

    • full test of electronics and acquisition chain

    • trigger threshold studies

    • self-trigger mode

  • volume ~10 t

  • at least one matrix of 16 PMTs with DAQ system

    (developed by PMm2 project, J.E.Campagne et al.)

  • install at APC, then at Fréjus lab: max available space: 3x3x3 m3

pictures for detected

optical photons

electron 10 MeV, pz / p = -1, vtx : centre

muon 1 GeV, pz / p = -1, vtx : top centre


Memphys memphyno e studies

MEMPHYS: MEMPHYNO e-, μ- studies

PEs per PMT

OPs’ arrival times

# of PMTs per electron

e- 20MeV

μ- 1GeV

muons generated over the detector’s surface with pz / p = -1

10k per energy electrons generated at the detector’s centre with random direction

Table: MEMPHYNO’s PEs per MeV per electron


Memphyno electrons 10 mev vertex finding

MEMPHYNOelectrons 10 MeV: vertex finding

  • primary vertex fit based only on each PMT’s timing info: ti PMT = ti + TOFi => ti = ti PMT – TOFi

    , where TOFi = (n / c) x D, D = distance between each PMT and grid’s coordinates

  • maximize estimator E a la SK to find the true vertex of electron :

direction

solid up to 450 around –z

dashed up to 250 around –z

best fit

estimator for all grid points vs

distance from true vertex

electrons generated at the detector’s centre

for the primary fit :

grid analysis (5cm spacing) in MEMPHYNO

good resolution for downwards electrons in x-y plane where is the PMTs’ module (shown)

resolution becomes worse as pz/p increases due to one PMTs’ module : best for perpendicular electrons

direction

solid up to 450 around –z

dashed up to 250 around –z

best fit


Memphyno muons 1 gev

MEMPHYNO muons 1 GeV

μ

light propagation effect of OPs :

  • check correlation of PMT time with distance between muon’s exit point and detection PMT’s coordinates

pz/p = -1

pz/p = -1

pz/p = -1

entry/exit: centre

entry/exit: middle

entry/exit: edges

pz/p < 0

  • pz/p = -1 : later produced OPs are detected first

  • pz/p < 0 : relation not clean

diagonal

trajectory


Memphyno simulation work

MEMPHYNO simulation work

  • any detector layout parametrization and analysis

  • ring reconstruction and PMT analysis graphics tools

one detector design example & plots

by E. Richard Stagiaire @APC-PARIS

  • first steps towards event reconstruction & PID


Memphys conclusions since nnn06

MEMPHYS: conclusions, since NNN06

  • the physics case is still strong, some new studies

  • LAGUNA has been approved and will finance more site studies in Fréjus as well as further steps with analysis code and physics studies, in collaboration with LENA and GLACIER

  • the photodetector R&D is in progress (PMm2)

  • a new MC based in GEANT4 is in construction, studies in :

    • vertex finding

    • light propagation

  • a prototype MEMPHYNO is in the design phase to be constructed in 2008-2009. It will provide studies on:

    • DAQ

    • self triggering

    • threshold studies

  • work on simulation, mechanical design, PMT R&D at APC & LAL


Thanks

Thanks


Memphys megaton mass physics detector n vassilopoulos lal on behalf of memphys collaboration

MEMPHYS: Fréjus feasibility study


Memphys fr jus summary

MEMPHYS: Fréjus summary


Memphys proton decay p e 0

MEMPHYS: Proton Decay, p  e+0

  • search for p  e+0 (3 showering event), efficiency ~ 43%

  • predictions: p~1034-1036 yrs

  • bdg:

  •  p > 1.6x1033yrs by SK

  •  p > 1.6x1035yrs at 90% CL for 5Mt.yr

    by MEMPHYS

    MEMPHYS coverage 30% with 12”PMTs is equivalent to coverage 40% with 20”PMTs in terms of #PE.

    MEMPHYS relies on the study by UNO, adapting the results

H2O is best for this channel


Memphys proton decay p k

MEMPHYS: Proton Decay, p  K

  • search for p  K (K+below cherenkov threshold so the channel is detected via the decay products of K+ )

    • K, monoenergetic  + 6.3 MeV prompt- from capture

    • K +0 with 

  • predictions: p~3x1033-3x1034 yrs

  • p > 2.3x1033yrs by SK

  • p~ 2x1034yrs for 5Mt.yr by MEMPHYS

H2O not as good as LAr, Lsint


Memphys sn in water erenkov detectors

MEMPHYS: SN νin water Čerenkov detectors


Memphys sn and 13 information

MEMPHYS: SN and θ13 information


Memphys sn neutronization burst

MEMPHYS: SN neutronization burst


Memphys sn shockwave information

MEMPHYS: SN shockwave information


Cern memphys oscillation measurements with beams sensitivity to the mass hierarchy

CERN-MEMPHYS: Oscillation measurements with  beams sensitivity to the mass hierarchy


Memphys oscillation measurements with beams sensitivity to octant of 23

MEMPHYS: Oscillation measurements with  beamssensitivity to octant of θ23


Memphys megaton mass physics detector n vassilopoulos lal on behalf of memphys collaboration

MEMPHYS: MC analyses

by J. E. Campagne


Memphyno muons 1 gev1

MEMPHYNO: muons 1 GeV

  • # of PMTs per muon, # of PEs per PMT, opticalphotons’ arrival times :

blacksheet reflective

blacksheet reflectivity=0

10k muons generated over the detector’s surface with pz / p = -1


Memphyno further simulation work

MEMPHYNO further simulation work

  • any detector layout parametrization and analysis

One detector example

by E.Richard Stagiaire @APC

  • ring reconstruction and PMT analysis graphics tools


Memphyno detector analysis tools for memphys memphyno

MEMPHYNOdetector analysis tools for MEMPHYS/MEMPHYNO

Plots by E.Richard

Stagiaire @APC

V

V

  • first steps towards event reconstruction & PID


Memphys memphyno analyses tools

MEMPHYS: MEMPHYNO analyses & tools

Analyses:

  • vertex finding for electrons

  • light propagation effects for muons

    Tools:

  • ring reconstruction and PMT analysis graphics tools


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