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Reconstruction of total muon number in KASCADE-Grande

Reconstruction of total muon number in KASCADE-Grande. Number of charged particles N ch. Number of muons N m. KASCADE-Grande. Area of 0.5km 2 370m 2 of detector surface Threshold of 5MeV for e/ g + m. KASCADE Array. 192 stations 622m 2 detector surface Threshold 230MeV for m.

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Reconstruction of total muon number in KASCADE-Grande

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  1. Reconstruction of total muon number in KASCADE-Grande

  2. Number of charged particles Nch Number of muons Nm KASCADE-Grande • Area of 0.5km2 • 370m2 of detector surface • Threshold of 5MeV for e/g+m KASCADE Array • 192 stations • 622m2 detector surface • Threshold 230MeV for m Jurriaan van Buren for KASCADE-Grande Collaboration

  3. 1·1017eV - 2 ·1017eV Determine composition with Ne and Nm Jurriaan van Buren for KASCADE-Grande Collaboration

  4. KASCADE-Grande reconstruction • Energy deposit of shower particles in scintillation detector • Additional contribution from the conversion of gamma component and hadrons • Lateral Energy Correction Function (LECF) gives average energy deposit per charged lepton • particle densities in detector • Fit of density distribution with Lateral Distribution Functions • shower core and first estimate of particle numbers Ne, (Nm) • arrival times to determine shower direction q, f • combined fit to obtain better results • derive muon number from KASCADE array muon detectors Jurriaan van Buren for the KASCADE-Grande Collaboration

  5. Fiducial area • false reconstructed shower cores at border of Grande Array • definition of fiducial area 600·600m2 • KASCADE Stations mostly between 275 – 625m • measure rm Dr<11m, 11m<Dr<30m, Dr>30m Jurriaan van Buren for KASCADE-Grande Collaboration

  6. Lateral density function for muons 1017eV, p + Fe, 22 ° Modified Lagutin function: with r0=430m NKG-function: with rmol=590m, s=1.2 Jurriaan van Buren for KASCADE-Grande Collaboration

  7. Reconstruction accuracy • Error of ≈ 30% in region of full efficiency • In radius region of most events error of ≈ 20% Jurriaan van Buren for KASCADE-Grande Collaboration

  8. Reconstruction accuracy • Error ≈ 30% in region of full efficiency • In radius region of most events error ≈ 10% Jurriaan van Buren for KASCADE-Grande Collaboration

  9. First data Jurriaan van Buren for KASCADE-Grande Collaboration

  10. Jurriaan van Buren for KASCADE-Grande Collaboration

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