Study of the night sky background for the EUSO-Balloon pathfinder in the JEM-EUSO mission / (Record no. 5301)

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fixed length control field 05302nam a22003497a 4500
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control field IT-CtSSC
005 - DATE AND TIME OF LATEST TRANSACTION
control field 20180128161036.0
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
fixed length control field 170113s2017 it a m 000 0 eng d
040 ## - CATALOGING SOURCE
Original cataloging agency IT-CtSSC
Transcribing agency IT-CtSSC
050 #4 - LIBRARY OF CONGRESS CALL NUMBER
Classification number QC484.8
082 #4 - DEWEY DECIMAL CLASSIFICATION NUMBER
Classification number 539.7
100 1# - MAIN ENTRY--PERSONAL NAME
Relator code aut
Personal name Anastasi, Gioacchino Alex
Fuller form of name (Gialex),
Dates associated with a name 1991-
245 10 - TITLE STATEMENT
Title Study of the night sky background for the EUSO-Balloon pathfinder in the JEM-EUSO mission /
Statement of responsibility, etc. Gioacchino Alex Anastasi ; relatore: Rossella Caruso ; controrelatore: Ivan De Mitri.
260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT)
Place of publication, distribution, etc. Catania :
Name of publisher, distributor, etc. Scuola Superiore di Catania,
Date of publication, distribution, etc. 2017.
300 ## - PHYSICAL DESCRIPTION
Extent 87 p. :
Other physical details ill. ;
Dimensions 25 cm.
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Source rdacontent
Content type term text
Content type code txt
337 ## - MEDIA TYPE
Source rdamedia
Media type term unmediated
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Source rdacarrier
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Carrier type code nc
502 ## - DISSERTATION NOTE
Dissertation note Tesi di diploma di 2° livello per la Classe delle Scienze Sperimentali
Degree type Diploma di 2° livello
Name of granting institution Scuola Superiore di Catania, Catania, Italy
Year degree granted 2017
Miscellaneous information A.A. 2016/2017
504 ## - BIBLIOGRAPHY, ETC. NOTE
Bibliography, etc Includes bibliographical references (p. 83-87).
505 0# - FORMATTED CONTENTS NOTE
Formatted contents note Introduction -- The cosmic rays and the techniques for the detection of the ultra high energy component -- The JEM-EUSO mission -- The diffuse night sky brightness -- Simulation of the night sky background in the JEM-EUSO mission -- Conclusion -- Bibliography.
518 ## - DATE/TIME AND PLACE OF AN EVENT NOTE
Date/time and place of an event note Tesi discussa il 13/01/2017.
520 3# - SUMMARY, ETC.
Summary, etc. The main goal of the present thesis is to provide a simulation of the diffuse night sky brightness that will constitute the background signal for the data collected during the JEM-EUSO space mission, starting from a preliminary analysis of the night sky background data collected by its EUSO-Balloon pathnder detector. The JEM-EUSO mission will be an observatory for the detection of ultra-high energy cosmic rays, extragalactic messengers of information about the Universe and its history. The ultra-high energy cosmic rays can be studied only through the observation of particle showers produce in their interaction with the Earth's atmosphere, using the fluorescence detection technique. In the first chapter the basics of the cosmic ray physics are addressed, describing shortly their propagation and acceleration from astrophysical sources to Earth and then focusing on the fluorescence technique used to reconstruct their characteristics from the detection of Extensive Air Showers. The second chapter deals with the description of the JEM-EUSO mission, introducing its scientic goals and its instruments, including three underway pathfinder experiments. In the third chapter the diffuse night sky brightness, the main background signal for the detection of fluorescence light from cosmic ray showers, is described. Despite the importance of this background, its implementation in the simulation of the JEM-EUSO experiment is still preliminary. Furthermore, the data already collected by the pathfinders are poorly exploited for this goal. Therefore the rst aim of the present thesis was to include a simulation of the night sky background in the JEM-EUSO software package. For this purpose I had to to study this software framework, briefly illustrated in the fourth chapter. The algorithm for the night sky background simulation has been successfully implemented and added to the software package. Although the operation is technically correct inside the JEM-EUSO software environment, it is not realistic: the outcome is what expected for a uniform flux of radiation (a good approximation for the night sky background) observed by an ideal detector with equal sensitivity for each pixel. That is not the case of the EUSO-Balloon instrument, as the detector presents a noticeable spread in the pixel response. Therefore a second issue arose: the requirement of taking into account for non homogeneous behaviour of pixels. The idea was to generate an algorithm for the determination of the pixel sensitivity on an event-by-event basis, through a statistical analysis of the temporal sequence of the FADC counts detected by each pixel. In this way each measurement of the diffuse night sky brightness could be used for an artificial "flat-fielding" of the detector. The developed algorithm was used on several events collected during the first EUSO-Balloon flight, to obtain the maps of pixel response shown in the forth chapter of the present thesis. In a first approximation, these results are in agreement with the measured maps of efficiency and of electronic noise presented at the last International Cosmic Ray Conference (2015) by the JEM-EUSO Collaboration. The success of this comparison represents a first validity check for the algorithm produced. The future goals are twofold. On the one hand, the implementation of the developed code inside the ocial release of the JEM-EUSO software package. On the other hand, it is foreseen an improvement of the algorithm for the pixel response and then proper validation tests. Indeed, it is forthcoming a proposal of this method to the JEM-EUSO Collaboration as a possible alternative for monitoring the detector performances when the normal calibration or "flat-fielding" methods are not available or can not be performed.
610 2# - SUBJECT ADDED ENTRY--CORPORATE NAME
Corporate name or jurisdiction name as entry element Fisicasci
650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name as entry element Nuclear astrophysics.
650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name as entry element Particles (Nuclear physics)
650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name as entry element Cosmic rays.
700 1# - ADDED ENTRY--PERSONAL NAME
Relator code ths
Personal name Caruso, Rossella.
700 1# - ADDED ENTRY--PERSONAL NAME
Relator code opn
Personal name De Mitri, Ivan.
912 ## - Local use
Cataloger initials G. G. N. Angilella
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Koha item type Tesi di Diploma, Master, PhD
Source of classification or shelving scheme
Holdings
Price effective from Date last seen Permanent Location Not for loan Date acquired Source of classification or shelving scheme Koha item type Barcode Lost status Damaged status Shelving location Withdrawn status Current Location Copy number Full call number
2017-01-142017-01-14Biblioteca Allievi 2017-01-13 Tesi di Diploma, Master, PhDAA003586  Sala B : Armadio Tesi Biblioteca Allievi1THS_2017 539.7 A534
2017-01-312017-01-31Biblioteca Allievi 2017-01-31 Tesi di Diploma, Master, PhDAA003596  Sala B : Armadio Tesi Biblioteca Allievi2THS_2017 539.7 A534