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Air-Shower Measurements with KASCADE-Grande

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Air-Shower Measurements with KASCADE-Grande 2036-22 International Workshop: Quantum Chromodynamics from Colliders to Super-High Energy Cosmic Rays 25 - 29 May 2009 Air-shower measurements with KASCADE-Grande Andreas Haungs Kernforschungszentrum Karlsruhe G.M.B.H. Germany Air-shower measurements with KASCADE-Grande Andreas Haungs [email protected] QCD workshop, Trieste-Italy, May 09 Andreas Haungs 1 Cosmic Rays around the knee(s) EeV Knee PeV 2nd Knee ? Ralph Engel, 2004 LOPES KASCADE -Grande QCD workshop, Trieste-Italy, May 09 Andreas Haungs 2 What is the origin of the (first) knee? various theories: Diffusion Acceleration Interaction Unknown effects of Escape from our Reach of maximum interactions at the air- Galaxy by diffusion energy at the shower development E(knee) ~ Z acceleration E(knee) ~ Z E(knee) ~ A QCD workshop, Trieste-Italy, May 09 Andreas Haungs 3 extensive air showers Differences in the shower development give hints to primary energy and mass QCD workshop, Trieste-Italy, May 09 Andreas Haungs 4 Measurement Techniques of Air Showers energy ? mass ? direction ? interaction ? ! large number of observables ! multi- detector system QCD workshop, Trieste-Italy, May 09 Andreas Haungs 5 Experiment: KASCADE-Grande = KArlsruhe Shower Core and Array DEtector + Grande and LOPES Measurements of air showers in the energy range E0 = 100 TeV - 1 EeV QCD workshop, Trieste-Italy, May 09 Andreas Haungs 6 KASCADE : multi-parameter measurements - energy range 100 TeV – 80 PeV - up to 2003: 4!107 EAS triggers - large number of observables: ! electrons ! muons (@ 4 threshold energies) ! hadrons QCD workshop, Trieste-Italy, May 09 Andreas Haungs 7 KASCADE set-up Multi-Detector-Setup ! Aim: measure as much as possible observables of the air-shower! QCD workshop, Trieste-Italy, May 09 Andreas Haungs 8 KASCADE – event example QCD workshop, Trieste-Italy, May 09 Andreas Haungs 9 KASCADE set-up Multi-Detector-Setup ! Aim: measure as much as possible observables of the air-shower ! QCD workshop, Trieste-Italy, May 09 Andreas Haungs 10 HE Muon Measurements at KASCADE • Central Detector muon facility thresh Eµ = 2400 MeV 2.4GeV !Muon Density measurements "# !Lateral distributions !Model tests (muon energy spectrum) 2.4/0.23 2.4GeV 0.23GeV R" = "# / "# • Muon Tracking Detector thresh Eµ = 800 MeV MUON TRACKING DETECTOR !Measurement of radial and tangential ABSORBER angles "#,$# !Muon production height 2,4 m !Lateral distributions 5,4 m !Model tests (pseudorapidity) 200 m )( ) %# = &ln('/2) '(= pt /pll = sqrt(" *$ ) CENTRAL DETECTOR ARRAY Andreas Haungs 11 CLUSTER 13 m 200 m first: analysis of basic observable - Total muon number and electron number ! mass estimator - high-energy local muon density ! energy estimator KASCADE : Astroparticle Physics 16 373 2002 • KNEE CAUSED BY DECREASING FLUX OF LIGHT ELEMENTS • Do we need hadronic interaction models? ! yes, for normalization of absolute energy and mass scale!! QCD workshop, Trieste-Italy, May 09 Andreas Haungs 12 Concept KASCADE Disententanglement of the threefold problem: E, A, interaction Measure shower parameters as much as possible Multi-detector system to get redundant information QCD workshop, Trieste-Italy, May 09 Andreas Haungs 13 KASCADE : energy spectra of single mass groups Measurement: KASCADE array data 900 days; 0-18o zenith angle 0-91m core distance lg Ne > 4.8; u tr lg N# > 3.6 n f ! 685868 events o ld in g Searched: E and A of the Cosmic Ray Particles Given: Ne and N# for each single event ! solve the inverse problem tr with y=(Ne,N # ) and x=(E,A) QCD workshop, Trieste-Italy, May 09 Andreas Haungs 14 KASCADE Unfolding procedure - kernel function obtained by Monte Carlo simulations (CORSIKA) - contains: shower fluctuations, efficiencies, reconstruction resolution KASCADE collaboration, Astroparticle Physics 24 (2005) 1-25, astro-ph/0505413 QCD workshop, Trieste-Italy, May 09 Andreas Haungs 15 KASCADE results - same unfolding but based on two different interaction models: - SIBYLL 2.1 and QGSJET01 (both with GHEISHA 2002) all embedded in CORSIKA SIBYLL QGSJet KASCADE collaboration, Astroparticle Physics 24 (2005) 1-25, astro-ph/0505413 QCD workshop, Trieste-Italy, May 09 Andreas Haungs 16 KASCADE : sensitivity to hadronic interaction models „light“ edge QCD workshop, Trieste-Italy, May 09 ge „heavy“ ed Andreas Haungs 17 KASCADE: sensitivity to hadronic interaction models SIBYLL QGSJet QCD workshop, Trieste-Italy, May 09 18 KASCADE results: confirmation - same unfolding but based on two different low energy interaction models and different zenith angle ranges: - GHEISHA 2002 and FLUKA (both with QGSJET01) - 0-18o, 18-25.9o, 25.9-32.3o (all with QGSJET01/FLUKA) - Less dependence for unfolding based on different low energy hadronic interaction models - Weak dependence on zenith angular binning (not significant) KASCADE collaboration, Astroparticle Physics (2009), accepted QCD workshop, Trieste-Italy, May 09 Andreas Haungs 19 Hadronic Interactions: Problems • Extrapolation of cross-sections to ultra-high energies • Secondary particle multiplicity in high-energy interactions • Extrapolation of kinematics to the extreme forward region (diffractive part of X-sections) rapidity distribution p-Air cross-section Ulrich 07 multiplicities [ CORSIKA (Heck et al) FZKA report 6019 ] QCD workshop, Trieste-Italy, May 09 Andreas Haungs 20 Hadrons in EAS! Hadronic interaction models and Energy flow in collider experiments LHC (Ecms =17 TeV) 17 Elab~ 10 eV e s r e v s n a r t l ta to " Direct access by hadrons QCD workshop, Trieste-Italy, May 09 Andreas Haungs 21 hadrons in air shower cores J. Engler et al., Nucl. Instr. Meth. A 427 (1999) 528 QCD workshop, Trieste-Italy, May 09 Andreas Haungs 22 hadrons in air shower cores: test of hadronic interaction models KASCADE observables per individual EAS: from detector array: general shower parameters from calorimeter: • number of reconstructed hadrons (Eh>100GeV) Nh • sum of the reconstructed hadronic energy +Eh max • energy of the leading hadron Eh • parameters of the spatial hadron distributions ,,.... QCD workshop, Trieste-Italy, May 09 Andreas Haungs 23 KASCADE data analyses: shower observable correlations Example: hadrons vs. muons Investigated many correlation of observables of all three particle components Electromagnetic Muonic Hadronic By using full simulations (including detector response) QCD workshop, Trieste-Italy, May 09 Andreas Haungs 24 KASCADE data analyses: shower observable correlations Example: hadrons vs. muons correlation of observables: no hadronic interaction model describes data consistently ! ! tests and tuning of hadronic interaction models ! ! close co-operation with theoreticians (CORSIKA including QGSJET, SIBYLL, FLUKA, GHEISHA,…..) QCD workshop, Trieste-Italy, May 09 Andreas Haungs 25 Shower observable correlations: QGSJET 01 Model tests with composition Ne-N µ analysis Number of hadrons vs. number of muons -)(distribution QCD workshop, Trieste-Italy, May 09 Andreas Haungs 26 Shower observable correlations: SIBYLL 2.1 Model tests with composition Ne-N µ analysis Number of hadrons vs. number of muons -)(distribution Inconsistencies at the level of 10% to 20% QCD workshop, Trieste-Italy, May 09 Andreas Haungs 27 KASCADE : test of new hadronic interaction models EPOS 1.61 „light“ edge QCD workshop, Trieste-Italy, May 09 ge „heavy“ ed Andreas Haungs 28 KASCADE: new hadronic interaction model: EPOS - unfolding based EPOS 1.61 and FLUKA (with CORSIKA 6.6) -) very proton dominant, but knee caused by light primaries -) no iron needed !EPOS predict too many muons or too less electrons (for KASCADE) KASCADE collaboration, ICRC 2007; J.Phys G (2008), in print QCD workshop, Trieste-Italy, May 09 Andreas Haungs 29 KASCADE – Test of EPOS 1.6 with hadrons +Eh –Nµ +Eh –Nh EPOS delivers not enough # energy per hadron too small hadronic energy to the ground # EPOS 1.6 is NOT CONSISTENT with KASCADE observations! QCD workshop, Trieste-Italy, May 09 Andreas Haungs 30 Shower observable correlations: Model tests J. Phys. G: Nucl. Part. Phys. 25 (1999) 2161 J. Phys. G: Nucl. Part. Phys. 34 (2007) 2581 J. Phys. G: Nucl. Part. Phys. (2009) 035201 •EPOS 1.6 is not compatible with KASCADE measurements •QGSJET-II has some deficiencies •QGSJET 01and SIBYLL 2.1still most compatible models ! New models are welcome for cross - tests with KASCADE data QCD workshop, Trieste-Italy, May 09 Andreas Haungs 31 Calibration of the KASCADE hadron calorimeter at the CERN SPS with hadrons up to 350 GeV S. Plewnia et al., Nucl. Instr. & Meth. A 566 (2006) 422 S. Plewnia et al., 29th ICRC, Pune 6 (2005) 17 QCD workshop, Trieste-Italy, May 09 Andreas Haungs 32 Unusual events? Hadrons measured in the calorimeter at an accelerator and in air showers Fluctuations in shower development, unusual events, long-flying component " In agreement with simulations 9 TeV QCD workshop, Trieste-Italy, May 09 Andreas Haungs 33 primary proton flux from hadron measurements primary proton flux x hadr "" 0 exp(&!. ) !i hadron spectrum at sea level Single hadron: EAS did not trigger array QCD workshop, Trieste-Italy, May 09 Andreas Haungs 34 primary proton flux from hadron measurements Average number of interactions when a single hadron was detected at KASCADE (simulations). QCD workshop, Trieste-Italy, May 09 Andreas Haungs 35 primary proton flux from hadron measurements QCD workshop, Trieste-Italy, May 09 Andreas Haungs 36 Spatial distribution: test of transverse momentum pt in hadronic interaction T. Antoni et al., 2 pt Phys. Rev. D 71 (2005) 072002 max d4 ½pt CORSIKA/QGSJET 01 QCD workshop, Trieste-Italy, May 09 Andreas
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