reconstruction of total muon number in kascade grande n.
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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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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

determine composition with n e and n m

1·1017eV - 2 ·1017eV

Determine composition with Ne and Nm

Jurriaan van Buren for KASCADE-Grande Collaboration

kascade grande reconstruction
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

fiducial area
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

lateral density function for muons
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

reconstruction accuracy
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

reconstruction accuracy1
Reconstruction accuracy
  • Error ≈ 30% in region of full efficiency
  • In radius region of most events error ≈ 10%

Jurriaan van Buren for KASCADE-Grande Collaboration

first data
First data

Jurriaan van Buren for KASCADE-Grande Collaboration