scholarly journals Observing ultra-high energy cosmic rays with prototypes of Fluorescence detector Array of Single-pixel Telescopes (FAST) in both hemispheres

2019 ◽  
Author(s):  
Toshihiro Fujii ◽  
Max Malacari ◽  
John Farmer ◽  
Justin Albury ◽  
Jose A Bellido ◽  
...  
Keyword(s):  
Cosmic Rays ◽  
High Energy ◽  
Detector Array ◽  
Ultra High Energy ◽  
Fluorescence Detector ◽  
High Energy Cosmic Rays ◽  
Single Pixel

scholarly journals THE MASS COMPOSITION OF ULTRA HIGH ENERGY COSMIC RAYS

2013 ◽  
Vol 53 (A) ◽  
pp. 698-702
Author(s):  
Aurelio F. Grillo
Keyword(s):  
Cosmic Rays ◽  
Particle Physics ◽  
High Energy ◽  
Pierre Auger Observatory ◽  
Mass Composition ◽  
Ultra High Energy ◽  
Fluorescence Detector ◽  
High Energy Cosmic Rays ◽  
The Status ◽  
Composition Measurements

The status of the Mass Composition measurements of Ultra High Energy Cosmic Rays is presented, with emphasis on the results from the Fluorescence Detector of the Pierre Auger Observatory. Possible consequences of the present measurements are discussed, both on the particle physics and astrophysics aspects.

scholarly journals Measurement of the cosmic ray spectrum with the Pierre Auger Observatory

2019 ◽  
Vol 209 ◽  
pp. 01029
Author(s):  
Daniela Mockler
Keyword(s):  
Cosmic Rays ◽  
Cosmic Ray ◽  
High Energy ◽  
Pierre Auger Observatory ◽  
Detector Array ◽  
Data Sets ◽  
Fluorescence Detector ◽  
High Energy Cosmic Rays ◽  
Systematic Uncertainties ◽  
Surface Detector

The flux of ultra-high energy cosmic rays above 3×1017 eV has been measured with unprecedented precision at the Pierre Auger Observatory. The flux of the cosmic rays is determined by four different measurements. The surface detector array provides three data sets, two formed by dividing the data into two zenith angle ranges, and one obtained from a nested, denser detector array. The fourth measurement is obtained with the fluorescence detector. By combing all four data sets, the all-sky flux of cosmic rays is determined. The spectral features are discussed in detail and systematic uncertainties are addressed.

scholarly journals Simulation of the optical performance of the Fluorescence detector Array of Single-pixel Telescopes

2019 ◽  
Vol 210 ◽  
pp. 05014
Author(s):  
Miroslav Pech ◽  
Justin Albury ◽  
Jose A. Bellido ◽  
John Farmer ◽  
Toshihiro Fujii ◽  
...  
Keyword(s):  
Low Cost ◽  
High Energy ◽  
Detector Array ◽  
Large Field ◽  
Spherical Mirror ◽  
Optical Performance ◽  
Large Area ◽  
Fluorescence Detector ◽  
High Energy Cosmic Rays ◽  
Single Pixel

The Fluorescence detector Array of Single-pixel Telescopes (FAST) is a proposed large-area, next-generation experiment for the detection of ultra-high energy cosmic rays via the atmospheric fluorescence technique. The telescope’s large field-of-view (30 ×30) is imaged by four 200 mm photomultiplier-tubes at the focal plane of a segmented spherical mirror of 1.6 m diameter. Two prototypes are installed and taking data at the Black Rock Mesa site of the Telescope Array experiment in central Utah, USA. We present the process used for optimization of the optical performance of this compact and low-cost telescope, which is based on a simulation of the telescope’s optical point spread function.

scholarly journals Precision measurements of the properties of cosmic rays at the highest energies

2019 ◽  
Vol 216 ◽  
pp. 01010
Author(s):  
Jörg R. Hörandel
Keyword(s):  
Cosmic Rays ◽  
Surface Area ◽  
High Energy ◽  
Pierre Auger Observatory ◽  
Precision Measurements ◽  
Detector Array ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays ◽  
Detection Capabilities

The Pierre Auger observatory is presently being upgraded to enlarge its detection capabilities for ultra-high-energy cosmic rays. Part of this upgrade is a radio detector array, aimed to cover a surface area of 3000 km2 to measure the properties of the highestenergy cosmic rays. The plans for this radio upgrade are outlined.

scholarly journals Precision measurements of cosmic rays up to the highest energies with a large radio array at the Pierre Auger Observatory

2019 ◽  
Vol 210 ◽  
pp. 06005 ◽  
Author(s):  
Jörg R. Hörandel ◽  
Keyword(s):  
Cosmic Rays ◽  
Surface Area ◽  
High Energy ◽  
Pierre Auger Observatory ◽  
Precision Measurements ◽  
Detector Array ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays ◽  
Detection Capabilities

The Pierre Auger Observatory is presently being upgraded to enlarge its detection capabilities for ultra-high-energy cosmic rays. Part of this upgrade is a radio detector array, aimed to cover a surface area of 3000 km2 to measure the properties of the highest-energy cosmic rays. The plans for this radio upgrade are outlined

scholarly journals Planck Neutrinos as Ultra High Energy Cosmic Rays

2020 ◽  
Vol 29 (1) ◽  
pp. 40-46
Author(s):  
Dmitri L. Khokhlov
Keyword(s):  
Black Holes ◽  
Cosmic Rays ◽  
Standard Model ◽  
Active Galactic Nuclei ◽  
Planck Scale ◽  
Galactic Nuclei ◽  
High Energy ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays ◽  
The Standard Model

AbstractThe studied conjecture is that ultra high energy cosmic rays (UHECRs) are hypothetical Planck neutrinos arising in the decay of the protons falling onto the gravastar. The proton is assumed to decay at the Planck scale into positron and four Planck neutrinos. The supermassive black holes inside active galactic nuclei, while interpreted as gravastars, are considered as UHECR sources. The scattering of the Planck neutrinos by the proton at the Planck scale is considered. The Planck neutrinos contribution to the CR events may explain the CR spectrum from 5 × 1018 eV to 1020 eV. The muon number in the Planck neutrinos-initiated shower is estimated to be larger by a factor of 3/2 in comparison with the standard model that is consistent with the observational data.

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