Cosmic ray spectrum from 250 TeV to 10 PeV using IceTop - INSPIRE

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Cosmic ray spectrum from 250 TeV to 10 PeV using IceTop

IceCube

Collaboration

•

M.G. Aartsen
(
- Canterbury U.
)

Jun 9, 2020

18 pages

Published in:

Phys.Rev.D 102 (2020) 122001

Published: Dec 3, 2020

e-Print:

2006.05215 [astro-ph.HE]

DOI:

10.1103/PhysRevD.102.122001

Experiments:

ICECUBE

View in:

ADS Abstract Service

reference search40 citations

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Abstract: (APS)

We report here an extension of the measurement of the all-particle cosmic-ray spectrum with IceTop to lower energy. The new measurement gives full coverage of the knee region of the spectrum and reduces the gap in energy between previous IceTop and direct measurements. With a new trigger that selects events in closely spaced detectors in the center of the array, the IceTop energy threshold is lowered by almost an order of magnitude below its previous threshold of 2 PeV. In this paper we explain how the new trigger is implemented, and we describe the new machine-learning method developed to deal with events with very few detectors hit. We compare the results with previous measurements by IceTop and others that overlap at higher energy and with HAWC and Tibet in the 100 TeV range.

Note:

21 pages, 17 captioned figures, 8 tables

Experiments in gravity, cosmology, cosmic rays
IceCube: surface
cosmic radiation: spectrum
energy: threshold
energy: high
trigger
overlap
HAWC
gap

References(57)

Figures(26)

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