Methods to improve and understand the sensitivity of high purity germanium detectors for searches of rare events:
Gespeichert in:
| 1. Verfasser: | |
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| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
2012
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| Schlagworte: | |
| Online-Zugang: | Volltext https://nbn-resolving.org/urn:nbn:de:bvb:91-diss-20120731-1109980-1-0 Inhaltsverzeichnis |
| Beschreibung: | V, 149 S. Ill., graph. Darst. |
Internformat
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| 100 | 1 | |a Volynets, Oleksandr |e Verfasser |4 aut | |
| 245 | 1 | 0 | |a Methods to improve and understand the sensitivity of high purity germanium detectors for searches of rare events |c Oleksandr Volynets |
| 264 | 1 | |c 2012 | |
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Datensatz im Suchindex
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| adam_text | IMAGE 1
TABLE OF CONTENTS
INTRODUCTION 1
1 NEUTRINOS 3
1.1 HISTORICAL OVERVIEW 3
1.2 NEUTRINOS IN THE STANDARD MODEL AND BEYOND 4
1.3 NEUTRINO OSCILLATIONS 5
1.3.1 NEUTRINO FLAVOUR MIXING 5
1.3.2 EXPERIMENTAL APPROACHES 6
1.4 MEASUREMENTS OF NEUTRINO MASSES 8
1.5 DOUBLE BETARDECAY 10
1.5.1 EXPERIMENTAL CONSIDERATIONS 13
1.5.2 EXPERIMENTS FOR OI//3/3 SEARCH IN 76 GE 16
2 T H E G E R D A EXPERIMENT 19
2.1 LOCATION AND APPARATUS 19
2.2 DETECTORS AND RUN CONFIGURATIONS 21
2.3 FIRST RESULTS AND CURRENT STATUS 22
3 GERMANIUM DETECTORS 2 5
3.1 INTERACTION OF PARTICLES WITH MATTER 25
3.2 GERMANIUM DETECTORS CHARACTERISTICS 28
3.3 SIGNAL FORMATION 29
3.4 CRYSTAL STRUCTURE 30
3.5 TEST FACILITIES FOR GERMANIUM DETECTORS A T THE MPI 32
4 POSSIBLE BACKGROUND SOURCES IN G E R D A AND FUTURE EXPERIMENTS 3 7
4.1 MONTE CARLO SIMULATION 37
4.2 CONTAMINATION OF ALUMINUM IN DETECTOR METALIZATION 40
4.3 CALCULATION OF BACKGROUND INDICES 42
4.4 RESULTS 42
4.5 SUMMARY 45
I
HTTP://D-NB.INFO/1032411937
IMAGE 2
TABLE OF CONTENTS
5 PULSE SHAPE ANALYSIS USING NEURAL NETWORK 4 7
5.1 SYSTEMATIC STUDIES WITH SIMULATED PULSES 48
5.1.1 SIMULATION AND DATA SETS 48
5.1.2 EVENT DISTRIBUTIONS OF THE SIMULATED TRAINING SETS 49
5.1.3 NEURAL NETWORK TRAINING 50
5.1.4 RESULTS OF NEURAL NETWORK EVALUATION 51
5.1.5 SUMMARY 56
5.2 APPLICATION TO GERDA CALIBRATION DATA 56
5.3 APPLICATION TO GERDA BACKGROUND DATA 60
5.4 SUMMARY AND CONCLUSIONS 65
6 TEMPERATURE DEPENDENCE O F PULSE LENGTHS 6 7
6.1 EXPERIMENTAL SETUP 67
6.2 EVENT SELECTION 68
6.3 SIMULATED PULSES 69
6.4 MODEL EXPECTATION 70
6.5 EXTRACTION OF MEASURED PULSES 73
6.6 RESULTS 75
6.7 DISCUSSION 79
6.8 SUMMARY 85
7 DETERMINATION O F T H E CRYSTAL AXES IN SEGMENTED DETECTORS 8 7
7.1 EXPERIMENTAL SETUP 88
7.2 AZIMUTH ANGLE SCAN 89
7.2.1 METHOD DESCRIPTION 89
7.2.2 EXTRACTION OF THE AXES ORIENTATION 90
7.2.3 SYSTEMATIC UNCERTAINTIES 90
7.2.4 RESULTS 92
7.3 OCCUPANCY ANALYSIS 93
7.3.1 METHOD DESCRIPTION 93
7.3.2 SIMULATION 93
7.3.3 CROSSTALK AND EVENT SELECTION 94
7.3.4 EXTRACTION OF OCCUPANCIES 95
7.3.5 EXTRACTION OF THE AXIS ORIENTATION 99
7.3.6 SYSTEMATIC UNCERTAINTIES 99
7.3.7 RESULTS 104
7.3.8 DISCUSSION OF UNCERTAINTIES IN THE MOBILITY 107
7.4 SUMMARY 108
8 LOCALIZATION O F T H E SOURCE POSITION 111
8.1 EXPERIMENTAL SETUP AND SIMULATION 112
8.2 EVENT SELECTION 113
8.3 DIRECTION METHOD 114
8.4 ABSOLUTE COORDINATE METHOD 118
II
IMAGE 3
TABLE OF CONTENTS
8.5 UNCERTAINTIES AND DISCUSSION 124
8.6 SUMMARY 125
SUMMARY AND CONCLUSIONS 127
A CROSSTALK 131
B OPTIMIZATION AND PARALLELIZATION O F OCCUPANCY CALCULATION 137
C DERIVATION O F T H E CONE INTERSECTION W I T H A SPHERE 141
BIBLIOGRAPHY 143
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| physical | V, 149 S. Ill., graph. Darst. |
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| spelling | Volynets, Oleksandr Verfasser aut Methods to improve and understand the sensitivity of high purity germanium detectors for searches of rare events Oleksandr Volynets 2012 V, 149 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier München, Techn. Univ., Diss., 2012 Reinststoff (DE-588)4177599-5 gnd rswk-swf Germaniumdetektor (DE-588)4329492-3 gnd rswk-swf Empfindlichkeit (DE-588)4127339-4 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Germaniumdetektor (DE-588)4329492-3 s Reinststoff (DE-588)4177599-5 s Empfindlichkeit (DE-588)4127339-4 s DE-604 Erscheint auch als Online-Ausgabe urn:nbn:de:bvb:91-diss-20120731-1109980-1-0 http://mediatum.ub.tum.de/node?id=1109980 Verlag kostenfrei Volltext https://nbn-resolving.org/urn:nbn:de:bvb:91-diss-20120731-1109980-1-0 Resolving-System DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=025241125&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Volynets, Oleksandr Methods to improve and understand the sensitivity of high purity germanium detectors for searches of rare events Reinststoff (DE-588)4177599-5 gnd Germaniumdetektor (DE-588)4329492-3 gnd Empfindlichkeit (DE-588)4127339-4 gnd |
| subject_GND | (DE-588)4177599-5 (DE-588)4329492-3 (DE-588)4127339-4 (DE-588)4113937-9 |
| title | Methods to improve and understand the sensitivity of high purity germanium detectors for searches of rare events |
| title_auth | Methods to improve and understand the sensitivity of high purity germanium detectors for searches of rare events |
| title_exact_search | Methods to improve and understand the sensitivity of high purity germanium detectors for searches of rare events |
| title_full | Methods to improve and understand the sensitivity of high purity germanium detectors for searches of rare events Oleksandr Volynets |
| title_fullStr | Methods to improve and understand the sensitivity of high purity germanium detectors for searches of rare events Oleksandr Volynets |
| title_full_unstemmed | Methods to improve and understand the sensitivity of high purity germanium detectors for searches of rare events Oleksandr Volynets |
| title_short | Methods to improve and understand the sensitivity of high purity germanium detectors for searches of rare events |
| title_sort | methods to improve and understand the sensitivity of high purity germanium detectors for searches of rare events |
| topic | Reinststoff (DE-588)4177599-5 gnd Germaniumdetektor (DE-588)4329492-3 gnd Empfindlichkeit (DE-588)4127339-4 gnd |
| topic_facet | Reinststoff Germaniumdetektor Empfindlichkeit Hochschulschrift |
| url | http://mediatum.ub.tum.de/node?id=1109980 https://nbn-resolving.org/urn:nbn:de:bvb:91-diss-20120731-1109980-1-0 http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=025241125&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
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