1. Measurement of the muon content in air showers at the Pierre Auger ObservatoryMarko Zavrtanik, Danilo Zavrtanik, Lili Yang, Serguei Vorobiov, Darko Veberič, Marta Trini, Samo Stanič, Ahmed Saleh, Gašper Kukec Mezek, Andrej Filipčič, Laura Collica, 2015, objavljeni znanstveni prispevek na konferenci Opis: The muon content of extensive air showers is an
observable sensitive to the primary composition and to
the hadronic interaction properties. We present here
different methods which allow us to estimate the muon number
at the ground level and the muon production depth by
exploiting the measurement of the longitudinal, lateral and
temporal distribution of particles in air showers recorded at
the Pierre Auger Observatory. The results, obtained at about
10[sup]19 eV (E[inf]CM ∼ 140 TeV center-of-mass energy for
proton primaries), are compared to the predictions
of LHC-tuned hadronic interaction models with different primary
masses and suggest a deficit in the muon content at the
ground predicted by simulations. The Pierre Auger Observatory
uses water-Cherenkov detectors to measure particle
densities at the ground and therefore has a good
sensitivity to the muon content of air showers. Moreover, due
to its hybrid design, the combination of muon measurements with
other independent mass composition analyses such as Xmax
provides additional constraints on hadronic interaction models.
Najdeno v: ključnih besedah
Povzetek najdenega: ...Pierre Auger Observatory,
ultra-high energy cosmic rays,
muons, mass composition,
hadronic interactions...
Ključne besede: Pierre Auger Observatory, ultra-high energy cosmic rays, muons, mass composition, hadronic interactions
Objavljeno: 03.03.2016; Ogledov: 1430; Prenosov: 115
 Polno besedilo (298,46 KB) |
2. The AMIGA Muon Counters of the Pierre Auger Observatory: Performance and Studies of the Lateral Distribution FunctionMarko Zavrtanik, Danilo Zavrtanik, Lili Yang, Serguei Vorobiov, Darko Veberič, Marta Trini, Samo Stanič, Ahmed Saleh, Gašper Kukec Mezek, Andrej Filipčič, Brian Wundheiler, 2015, objavljeni znanstveni prispevek na konferenci Opis: The AMIGA enhancement (Auger Muons and Infill for the Ground
Array) of the Pierre Auger Observatory consists of a 23.5 km2
infill area where air shower particles are sampled by water-
Cherenkov detectors at the surface and by 30 m2 scintillation
counters buried 2.3 m underground. The Engineering Array of
AMIGA, completed since February 2015, includes 37 scintillator
modules (290 m2) in a hexagonal layout. In this work, the muon
counting performance of the scintillation detectors is analysed
over the first 20 months of operation. Parametrisations of the
detector counting resolution and the lateral trigger
probability are presented. Finally, preliminary results on the observed muon lateral distribution function (LDF) are discussed.
Najdeno v: ključnih besedah
Povzetek najdenega: ...The AMIGA enhancement (Auger Muons and Infill for the Ground
Array) of the...
Ključne besede: Pierre Auger Observatory, AMIGA (Auger Muons and Infill for the Ground Array) muon
counters, muon lateral distribution function (LDF)
Objavljeno: 03.03.2016; Ogledov: 1455; Prenosov: 86
Polno besedilo (499,33 KB) |
3. Measurement of the water-Cherenkov detector response to inclined muons using an RPC hodoscopeMarko Zavrtanik, Danilo Zavrtanik, Lili Yang, Serguei Vorobiov, Darko Veberič, Marta Trini, Samo Stanič, Ahmed Saleh, Gašper Kukec Mezek, Andrej Filipčič, Pedro Assis, 2015, objavljeni znanstveni prispevek na konferenci Opis: The Pierre Auger Observatory operates a hybrid detector
composed of a Fluorescence Detector and a Surface Detector
array. Water-Cherenkov detectors (WCD) are the building blocks
of the array and as such play a key role in the detection of
secondary particles at the ground. A good knowledge of the
detector response is of paramount importance to lower
systematic uncertainties and thus to increase the capability
of the experiment in determining the muon content of the
extensive air showers with a higher precision.
In this work we report on a detailed study of the detector
response to single muons as a function of their trajectories
in the WCD. A dedicated Resistive Plate Chambers (RPC)
hodoscope was built and installed around one of the detectors.
The hodoscope is formed by two stand-alone low gas flux
segmented RPC detectors with the test water-Cherenkov detector
placed in between. The segmentation of the RPC detectors is of
the order of 10 cm. The hodoscope is used to trigger and
select single muon events in different geometries. The signal
recorded in the water-Cherenkov detector and performance
estimators were studied as a function of the trajectories of
the muons and compared with a dedicated simulation.
An agreement at the percent level was found, showing that the
simulation correctly describes the tank response.
Najdeno v: ključnih besedah
Ključne besede: Pierre Auger Observatory, Water-Cherenkov detectors, detector calibration, inclined cosmic ray muons, Resistive Plate Chambers (RPC) hodoscope
Objavljeno: 03.03.2016; Ogledov: 1651; Prenosov: 98
Polno besedilo (1,27 MB) |
4. Muon counting using silicon photomultipliers in the AMIGA detector of the Pierre Auger observatoryMarko Zavrtanik, Danilo Zavrtanik, Lili Yang, Serguei Vorobiov, Darko Veberič, Marta Trini, Samo Stanič, Ahmed Saleh, Gašper Kukec Mezek, Andrej Filipčič, A. Aab, 2017, izvirni znanstveni članek Najdeno v: ključnih besedah
Povzetek najdenega: ...air showers (EAS), EAS muon content,
Auger Muons and Infill for the Ground Array (AMIGA),...
Ključne besede: Pierre Auger Observatory, ultra-high energy cosmic rays (UHECR), extensive air showers (EAS), EAS muon content, Auger Muons and Infill for the Ground Array (AMIGA), scintillation modules for muon counting, silicon photomultipliers (SiPM)
Objavljeno: 08.03.2017; Ogledov: 1255; Prenosov: 1
Polno besedilo (1,12 MB) |
