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EAS EXPERIMENTON BOARD
OF THE AIRBUS A380 J. N. Capdevielle, F. Cohen, PCC, College de France
K. Jedrzejczak, B. Szabelska, J. Szabelski, T. Wibig The Andrzej Soltan Institute for Nuclear Studies, Cosmic Ray Laboratory, Lodz, Poland [email protected]
EAS EXPERIMENTON BOARD
OF THE AIRBUS A380 J. N. Capdevielle, F. Cohen, PCC, College de France
K. Jedrzejczak, B. Szabelska, J. Szabelski, T. Wibig The Andrzej Soltan Institute for Nuclear Studies, Cosmic Ray Laboratory, Lodz, Poland [email protected]
The idea is to use test flights of the airbus A380 to load its internal space by the Cosmic Ray detectors.
EAS EXPERIMENT ON BOARD OF THE AIRBUS A380
Altitude: 10 km, 250 g/cm2
Exposure: 5000 - 10,000 hoursSize: 70m x 6m (double decker)Max. Weight: ~80 tons
EAS EXPERIMENT ON BOARD OF THE AIRBUS A380
We want to register:●EAS ●single energetic hadrons (protons)
at the altitude of 10 km.
EAS: iron group energy spectrum can be determined up to about 107 GeV
single proton: energy spectrum up to about 106 GeV can be determined.
EAS EXPERIMENT ON BOARD OF THE AIRBUS A380
The detectors would register:●soft component (counts)●muons (counts)●Hadrons (energy weighted counts)
Detectors would be distributed over the upper passenger area
6 - 7 m
60 - 65 m
EAS EXPERIMENT ON BOARD OF THE AIRBUS A380
EAS simulations: electron densities @ 10 km
CORSIKA v 6.018 simulations
EAS EXPERIMENT ON BOARD OF THE AIRBUS A380
EAS simulations: Average gamma and electron densities @ 10 km
CORSIKA v 6.018 simulations
Differences proton/iron are similar for gammas and electrons
EAS EXPERIMENT ON BOARD OF THE AIRBUS A380
EAS simulations: Average EAS hadron densities @ 10 km
CORSIKA v 6.018 simulations
Distibutions for proton and iron are "parallel"
EAS EXPERIMENT ON BOARD OF THE AIRBUS A380
Iron EAS selection method
Iron EAS are regularly developed
Figure presentsfor 106, 107 and 108 GeVseparately for each EAS:ratio of average electron density near to the core (1-5 m) to densityat 20-30 m from the corevs.Average density at 20-30 m
Protons are in red Iron are in blue
proton EAS undergo large fluctuations
EAS EXPERIMENT ON BOARD OF THE AIRBUS A380
Iron EAS selection method
Iron EAS are regularly developed
Figure presentsfor 106, 107 and 108 GeVseparately for each EAS:ratio of average electron density near to the core (1-5 m) to densityat 20-30 m from the corevs.Average density at 20-30 m
Protons are in red Iron are in blue
proton EAS undergo large fluctuations
EAS EXPERIMENT ON BOARD OF THE AIRBUS A380
Detector unit
Weights:scintillators 2 x 5 kgcarbon 226 kglead 283 kgpolyethylene 83 kg TOTAL: about 700 kg / unit
Hadron interactions:above lead - probability ~0.7
in lead - probability ~0.5
EAS EXPERIMENT ON BOARD OF THE AIRBUS A380
Hadron detection
Secondary hadron interacting with (destroing) lead nucleus produces neutrons of MeV energy range (on average about 40 neutrons per interaction).
Hadron and hadron energy would be register thanks to its●interaction inside a detector●secondary hadron multiplicity produced in that interaction
Neutron detector (counters) can have efficiency of about 3% (i.e. Moderator and a few 3He counters). Example (average numbers):100 GeV vertical proton, interaction in carbon block probability 0.7,average hadron multiplcity 10,average number of neutrons 300,average number of 3He counters counts 12.
EAS EXPERIMENT ON BOARD OF THE AIRBUS A380
Hadron detection
Hadron multiplicity
CORSIKA v 6.018 simulations
EAS hadrons interact in carbon and produce large number of hadrons in the detector
Hadrons produced in detectorby EAS hadrons
A=2.7, B=-0.03, C=0.167D=-7, F=7.2, G=0.127C.J.Almer et al. UA5 Collab.,Phys. Letters B, 167 (1986), 476
EAS EXPERIMENT ON BOARD OF THE AIRBUS A380
Cosmic Ray spectra and limits (example)
CR spectra following: Jorg R. Horandel On the Knee in the Energy Spectrum of Cosmic Ray', astro-ph/0210453 20 Oct. 2002, assuming the knee at 2 x 106GeV/particles.
EAS EXPERIMENT ON BOARD OF THE AIRBUS A380
Cosmic Ray spectra and limits (example) (in numbers for 5000h)
Energy(GeV)105
3.2x105
106
3.2x106
107
3.2x107
108
Rigidity
1700240
303.10.3
Energy
1700240
303.10.3
Mass
1700240
303.10.3
Mass
910150
243.60.5
Rigidity
910150
233.10.3
Energy
760847.80.7
0.06
the knee depends on:
Expeted surviving proton number
Expeted EAS number of CR iron origin
EAS EXPERIMENT ON BOARD OF THE AIRBUS A380
Conclusions
Set of compact detectors distributed throughout passenger cabin of the Airbus A380 during its test flights would provide opportunity of Cosmic Ray registration with energies around the knee :
proton component (as registration of particles surviving without interaction + veto from the array) up to the knee region
heavy component energy spectra up to several times the knee energy with the discrimination between different models of mass compositions above the knee.
