Identifying cosmic ray induced cascade events with IceTop
IceCube is the largest neutrino detector in the world. It consists of an array of photomultiplier tubes installed throughout a cubic kilometre of ice below the surface at the South Pole. These photomultiplier tubes detect the Cherenkov radiation from neutrino-nucleon interactions. IceTop is the surf...
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ftunivcanter:oai:ir.canterbury.ac.nz:10092/14940 2023-05-15T18:23:16+02:00 Identifying cosmic ray induced cascade events with IceTop Munawar, Kiran 2017 application/pdf http://hdl.handle.net/10092/14940 https://doi.org/10.26021/8983 English en eng University of Canterbury http://hdl.handle.net/10092/14940 http://dx.doi.org/10.26021/8983 All Rights Reserved https://canterbury.libguides.com/rights/theses Theses / Dissertations 2017 ftunivcanter https://doi.org/10.26021/8983 2022-09-08T13:42:13Z IceCube is the largest neutrino detector in the world. It consists of an array of photomultiplier tubes installed throughout a cubic kilometre of ice below the surface at the South Pole. These photomultiplier tubes detect the Cherenkov radiation from neutrino-nucleon interactions. IceTop is the surface component of IceCube neutrino observatory and is used to study Cosmic Ray Extensive Air Showers (EAS). The goal of IceCube is to investigate astophysical neutrinos. However the majority of events recorded by IceCube are background events caused by cosmic rays interacting in the Earth's atmosphere. This thesis is concerned with developing a technique to veto the background events from the IceCube experimental data using the IceTop surface array. Four original studies were performed. In the rst study the output of a cosmic-ray air shower simulation code was compared with real events detected by IceCube and IceTop. It was found that the simulation code performed well, although in some cases the actual number of hits detected in IceTop ws greater than predicted. However as far as assessing the ability of IceTop as a veto this means our estimates will be conservative which would mean that the veto would be more e ective than estimated. In the second study the cosmic-ray simulation code was used to investigate the scope of background events which might be able to vetoed using the IceTop array and the energies and zenith angles where the veto would be e ective were given. The appropriate time window for deciding whether an IceTop hit was related to an event detected in the IceCube detector was investigated in the third study and was found to be -500 ns to 800 ns relative to the timing of the IceCube event. In the fourth study, the nal sample of a published IceCube cascade analysis was examined to determine whether there were any related hits in the IceTop array. Other/Unknown Material South pole University of Canterbury, Christchurch: UC Research Repository South Pole |
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University of Canterbury, Christchurch: UC Research Repository |
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ftunivcanter |
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English |
description |
IceCube is the largest neutrino detector in the world. It consists of an array of photomultiplier tubes installed throughout a cubic kilometre of ice below the surface at the South Pole. These photomultiplier tubes detect the Cherenkov radiation from neutrino-nucleon interactions. IceTop is the surface component of IceCube neutrino observatory and is used to study Cosmic Ray Extensive Air Showers (EAS). The goal of IceCube is to investigate astophysical neutrinos. However the majority of events recorded by IceCube are background events caused by cosmic rays interacting in the Earth's atmosphere. This thesis is concerned with developing a technique to veto the background events from the IceCube experimental data using the IceTop surface array. Four original studies were performed. In the rst study the output of a cosmic-ray air shower simulation code was compared with real events detected by IceCube and IceTop. It was found that the simulation code performed well, although in some cases the actual number of hits detected in IceTop ws greater than predicted. However as far as assessing the ability of IceTop as a veto this means our estimates will be conservative which would mean that the veto would be more e ective than estimated. In the second study the cosmic-ray simulation code was used to investigate the scope of background events which might be able to vetoed using the IceTop array and the energies and zenith angles where the veto would be e ective were given. The appropriate time window for deciding whether an IceTop hit was related to an event detected in the IceCube detector was investigated in the third study and was found to be -500 ns to 800 ns relative to the timing of the IceCube event. In the fourth study, the nal sample of a published IceCube cascade analysis was examined to determine whether there were any related hits in the IceTop array. |
format |
Other/Unknown Material |
author |
Munawar, Kiran |
spellingShingle |
Munawar, Kiran Identifying cosmic ray induced cascade events with IceTop |
author_facet |
Munawar, Kiran |
author_sort |
Munawar, Kiran |
title |
Identifying cosmic ray induced cascade events with IceTop |
title_short |
Identifying cosmic ray induced cascade events with IceTop |
title_full |
Identifying cosmic ray induced cascade events with IceTop |
title_fullStr |
Identifying cosmic ray induced cascade events with IceTop |
title_full_unstemmed |
Identifying cosmic ray induced cascade events with IceTop |
title_sort |
identifying cosmic ray induced cascade events with icetop |
publisher |
University of Canterbury |
publishDate |
2017 |
url |
http://hdl.handle.net/10092/14940 https://doi.org/10.26021/8983 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
http://hdl.handle.net/10092/14940 http://dx.doi.org/10.26021/8983 |
op_rights |
All Rights Reserved https://canterbury.libguides.com/rights/theses |
op_doi |
https://doi.org/10.26021/8983 |
_version_ |
1766202829658128384 |