www.consorzio-cometa.it Consorzio COMETA - Progetto PI2S2 UNIONE EUROPEA NEMO Monte Carlo Application on the Grid NEMO Monte Carlo NEMO Monte Carlo Application on the Grid Application on the Grid R. Calcagno R. Calcagno for the NEMO Collaboration for the NEMO Collaboration Grid Open Day at Lns Grid Open Day at Lns Catania 2008 January 23 Catania 2008 January 23
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www.consorzio-cometa.it
Consorzio COMETA - Progetto PI2S2UNIONE EUROPEA
NEMO Monte Carlo Application on the Grid
NEMO Monte Carlo NEMO Monte Carlo Application on the GridApplication on the Grid
R. CalcagnoR. Calcagno for the NEMO Collaborationfor the NEMO Collaboration
Grid Open Day at LnsGrid Open Day at LnsCatania 2008 January 23Catania 2008 January 23
Grid Open Day at Laboratori Nazionali del Sud, 2008 January 23 2
The NEMO project
Shore stationShore stationShore stationShore station
R&D for the design and construction of a km3 high energy neutrino detector
Grid Open Day at Laboratori Nazionali del Sud, 2008 January 23 3
Neutrino astronomy: detector concept
neutrino
muon
Cherenkov light
~5000 PMTatmospheric muon
depth>3000m
Detection of Cherenkov light in transparent natural media (water or ice)
neutrino
Grid Open Day at Laboratori Nazionali del Sud, 2008 January 23 4
Neutrino detection: signal and background
Search for muon tracks from neutrino interactions
Earth is used as shield to cut off the downgoing atmospheric µ
background
Upgoing tracks can unambigously be attributed to
neutrinos
The predicted neutrino fluxes are weak and it is necessary to take
into account the expected background noise.
One of the main sources of background are the atmospheric
muon generated by the interaction of cosmic rays with
the atmosphere.
Simulation of this background needs a huge number of
MonteCarlo events.
Grid Open Day at Laboratori Nazionali del Sud, 2008 January 23 5
NEMO proposed km3 telescope
main EO cablemain Junction Box
secondary JB
“tower”
km3 size square array of detection structures ( “towers“ )
Grid Open Day at Laboratori Nazionali del Sud, 2008 January 23 6
Code Chain
Corsika Music Km3 Modk40 Femsim Reco
Code chain for atmospheric muon simulation are:
Grid Open Day at Laboratori Nazionali del Sud, 2008 January 23 7
Simulation
• Corsika code simulates the interaction of cosmic rays with the atmosphere and the propagation of the generated showers.Muons are propagated up to the sea level.
• Km3 simulates the light emission, the propagation in water,and the detection by the PMTs. In order to simulate the light radiation is necessary a parameterization which depends on the muon energy lost in the trace segment and on the optical water properties. PMT hits are simulated.
• Music simulates the muon propagation in the sea water.
Grid Open Day at Laboratori Nazionali del Sud, 2008 January 23 8
Simulation
• FemSim simulates the working operation of the electronic devices
• Reco performs the reconstruction of the muon track direction
• Modk40 adds hits due to optical background that in salt water is due 40K
Grid Open Day at Laboratori Nazionali del Sud, 2008 January 23 9
Simulation Codes Structure
Simulation codes are performed in sequential way: the output of the first code is the input of the second one, the output for the second one is the input of the
third one and so on
Moreover, many files are necessary to the code chain to
run (detector geometry file, input parameter files, tables …)
Simulation codesI n p u t
O u t p u t
I n p u t
O u t p u t
I n p u t
O u t p u t
CORSIKA
MUSIC
KM3
O u t p u t
I n p u t
O u t p u t
I n p u t
O u t p u t
I n p u t RECO
MOD40
FEMSIM
Grid Open Day at Laboratori Nazionali del Sud, 2008 January 23 10
Grid Application
Background Monte Carlosimulation needs a wide
statistic and big processing time, therefore GRID is the
ideal tool to simulate this huge amount of events.
I n p u t
O u t p u t
I n p u t
O u t p u t
I n p u t
O u t p u t
I n p u t
O u t p u t
I n p u t
O u t p u t
I n p u t
O u t p u t
CORSIKA
MUSIC
RECO
KM3
MOD40
FEMSIM
Grid Open Day at Laboratori Nazionali del Sud, 2008 January 23 11
Grid Application
O u t p u t
O u t p u t
O u t p u t
O u t p u t
O u t p u t
O u t p u t
I n t p u t
I n t p u t
I n t p u t
I n t p u t
I n t p u t
I n t p u t CORSIKA
MUSIC
KM3
MOD40
FEMSIM
RECO
O u t p u t
O u t p u t
O u t p u t
O u t p u t
O u t p u t
O u t p u t
I n t p u t
I n t p u t
I n t p u t
I n t p u t
I n t p u t
I n t p u t CORSIKA
MUSIC
KM3
MOD40
FEMSIM
RECO
O u t p u t
O u t p u t
O u t p u t
O u t p u t
O u t p u t
O u t p u t
I n t p u t
I n t p u t
I n t p u t
I n t p u t
I n t p u t
I n t p u t CORSIKA
MUSIC
KM3
MOD40
FEMSIM
RECO
The developed application is a trivial parallel execution of simulation codes on the Grid.
...
Grid Open Day at Laboratori Nazionali del Sud, 2008 January 23 12
Implementation
• The first of Code Chain is Corsika
O u t p u t
CORSIKA
Input file size < 10MB...
Inputs
EGSDAT4_.15 esegui_100.sh
corsika_flat.exe EGSDAT4_3.
EGSDAT4_1.QGSDAT01
EGSDAT4_.05 EGSDAT4_3.
EGSDAT4_.4 EGSDAT4_25.
NUCNUCCSinputs_v2_100
Grid Open Day at Laboratori Nazionali del Sud, 2008 January 23 13
Upload on SE
A virtual directory is created on the storage element (SE)
The output file is downloaded
The upload of Corsika file is performed on a SE and is recorded on the LFC Catalog
CORSIKA
CORSIKA
SE
O u t p u t
WN
CORSIKA
The submitted job transfers the input files from the SE to the WN
Grid Open Day at Laboratori Nazionali del Sud, 2008 January 23 14
Upload on SE: User
SE
SE
Catalog File
SEU I
Grid Open Day at Laboratori Nazionali del Sud, 2008 January 23 15