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EAS EXPERIMENT ON 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 EXPERIMENT ON BOARD

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slide1

EAS EXPERIMENT

ON 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]

slide3

EAS EXPERIMENT

ON 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]

slide4

EAS EXPERIMENT ON BOARD OF THE AIRBUS A380

The idea is to use test flights of the airbus A380 to load its internal space by the Cosmic Ray detectors.

Altitude: 10 km, 250 g/cm2

Exposure: 5000 - 10,000 hours

Size: 70m x 6m (double decker)

Max. Weight: ~80 tons

slide5

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.

slide6

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

slide7

EAS EXPERIMENT ON BOARD OF THE AIRBUS A380

EAS simulations: electron densities @ 10 km

CORSIKA v 6.018 simulations

slide8

EAS EXPERIMENT ON BOARD OF THE AIRBUS A380

EAS simulations: Average gamma and electron densities @ 10 km

Differences proton/iron are similar for gammas and electrons

CORSIKA v 6.018 simulations

slide9

EAS EXPERIMENT ON BOARD OF THE AIRBUS A380

EAS simulations: Average EAS hadron densities @ 10 km

Distibutions for proton and iron are "parallel"

CORSIKA v 6.018 simulations

slide10

EAS EXPERIMENT ON BOARD OF THE AIRBUS A380

Iron EAS selection method

Figure presents

for 106, 107and 108GeV

separately for each EAS:

ratio of average electron density near to the core (1-5 m) to density

at 20-30 m from the core

vs.

Average density at 20-30 m

Iron EAS are regularly developed

proton EAS undergo large fluctuations

Iron are in blue

Protons are in red

slide11

EAS EXPERIMENT ON BOARD OF THE AIRBUS A380

Iron EAS selection method

Figure presents

for 106, 107and 108GeV

separately for each EAS:

ratio of average electron density near to the core (1-5 m) to density

at 20-30 m from the core

vs.

Average density at 20-30 m

Iron EAS are regularly developed

proton EAS undergo large fluctuations

Iron are in blue

Protons are in red

slide12

EAS EXPERIMENT ON BOARD OF THE AIRBUS A380

Detector unit

Weights:

scintillators 2 x 5 kg

carbon 226 kg

lead 283 kg

polyethylene 83 kg

TOTAL: about 700 kg / unit

Hadron interactions:

above lead - probability ~0.7

in lead - probability ~0.5

slide13

EAS EXPERIMENT ON BOARD OF THE AIRBUS A380

Hadron detection

Hadron and hadron energy would be register thanks to its

  • interaction inside a detector
  • secondary hadron multiplicity produced in that interaction

Secondary hadron interacting with (destroing) lead nucleus produces neutrons of MeV energy range (on average about 40 neutrons per 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.

slide14

EAS EXPERIMENT ON BOARD OF THE AIRBUS A380

Hadron detection

EAS hadrons interact in carbon and produce large number of hadrons in the detector

Hadrons produced in detector

by EAS hadrons

Hadron multiplicity

A=2.7, B=-0.03, C=0.167

D=-7, F=7.2, G=0.127

C.J.Almer et al. UA5 Collab.,Phys. Letters B, 167 (1986), 476

CORSIKA v 6.018 simulations

slide15

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.

slide16

EAS EXPERIMENT ON BOARD OF THE AIRBUS A380

Cosmic Ray spectra and limits

(example) (in numbers for 5000h)

the knee depends on:

Energy

760

84

7.8

0.7

0.06

Mass

910

150

24

3.6

0.5

Mass

1700

240

30

3.1

0.3

Energy

1700

240

30

3.1

0.3

Rigidity

910

150

23

3.1

0.3

Rigidity

1700

240

30

3.1

0.3

Energy

(GeV)

105

3.2x105

106

3.2x106

107

3.2x107

108

Expeted EAS number of CR iron origin

Expeted surviving proton number

slide17

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.

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