Fraction of range out and energy loss

Introduction

In order to investigate fraction of ranged out muon and energy loss inside the IceCube detector, I used CORSIKA iron data with IC22 configuration (with SIBYLL).

Fraction of range out muon number in the IceCube detector

I have checked the number of muon ranged out in the IceCube detector. The condition of NDOM>=80 is applied.

Substantial number of muons die out in the detector. Many (low energy) muons range out for vertical muon bundles (~90%), while less muons range out inside the detector for inclinded muon bundles since low energy muons are already ranged out before reaching to the detector.

Fraction of range out muon number

Fraction of range out muon number (cos(ZA)>0.7)

Fraction of range out muon number (cos(ZA)<0.7)

Fraction of total energy loss in the IceCube detector

I have checked the total energy loss in the IceCube detector. The condition of NDOM>=80 is applied.

Quite high fraction of energy is lost inside the detector since muon bundles consists of many low enrgy muons.

The energy loss in the detector is larger for vertical muon bundles compared to inclinded ones since low energy muons are ranged out for inclind muon bundles.

Fraction of total energy loss

Fraction of total energy loss (cos(ZA)>0.7)

Fraction of total energy loss (cos(ZA)<0.7)

Keiichi Mase