Development of floating strip micromegas detectors:
Gespeichert in:
| 1. Verfasser: | |
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| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
2014
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| Schlagworte: | |
| Online-Zugang: | kostenfrei http://d-nb.info/1052015425/34 Inhaltsverzeichnis |
| Beschreibung: | XIV, 207 S. Ill., graph. Darst. |
| Format: | Langzeitarchivierung gewährleistet, LZA |
Internformat
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| 245 | 1 | 0 | |a Development of floating strip micromegas detectors |c Jonathan Bortfeldt |
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Datensatz im Suchindex
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|---|---|
| adam_text | DEVELOPMENT OF
FLOATING STRIP MICROMEGAS DETECTORS
DISSERTATION DER FAKULTAT FIIR PHYSIK
DER
LUDWIG-MAXIMILIANS-UNIVERSITAT MIINCHEN
VORGELEGT VON
JONATHAN BORTFELDT
GEBOREN IN KOLN
MIINCHEN, DEN 14.03.2014
HTTP://D-NB.INFO/1052911137
CONTENTS
1 INTRODUCTION 1
1.1 THE MICROMEGAS DETECTOR 1
1.1.1 FUNCTIONAL PRINCIPLE 1
1.1.2 PERFORMANCE AND CHALLENGES 2
1.1.3 CURRENT APPLICATIONS 3
1.2 THE LHC. THE ATLAS EXPERIMENT & UPGRADE PLANS WITH MICROMEGAS .... 4
1.2.1 THE ATLAS EXPERIMENT 5
1.2.2 NEW SMALL WHEEL UPGRADE 6
1.3 MEDICAL APPLICATION OF MICROMEGAS 7
1.3.1 ION BEAM THERAPY AND THE HEIDELBERG ION THERAPY CENTER 8
1.3.2 ION TRANSMISSION IMAGING 8
1.4 ON THE CONTENT OF THIS THESIS 10
2 FUNCTIONAL PRINCIPLE OF MICROMEGAS 13
2.1 INTERNAL SETUP 13
2.2 INTERACTION OF PARTICLES AND PHOTONS IN THE DETECTOR 14
2.2.1 CHARGED PARTICLES 14
2.2.2 PHOTONS 17
2.2.3 MULTIPLE SCATTERING OF CHARGED PARTICLES 19
2.3 DRIFT OF ELECTRONS AND IONS IN GASES 19
2.4 GAS AMPLIFICATION 21
2.5 SIGNAL FORMATION 24
2.6 MESH TRANSPARENCY 25
2.7 DISCHARGES 27
3 FLOATING STRIP MICROMEGAS 29
3.1 CURRENT MICROMEGAS TYPES 29
3.1.1 STANDARD MICROMEGAS 29
3.1.2 RESISTIVE STRIP MICROMEGAS 30
IX
X
CONTENTS
3.1.3 INGRID - INTEGRATED SILICON WAVER BASED MICROMEGAS 32
3.2 THE FLOATING STRIP PRINCIPLE 32
3.2.1 THE IDEA 32
3.2.2 REALIZATION - DISCRETE AND INTEGRATED FLOATING STRIP MICROMEGAS
... 33
3.3 DISCHARGE PERFORMANCE 34
3.3.1 EXPERIMENTAL INVESTIGATION OF DISCHARGES 34
3.3.2 LTSPICE DETECTOR MODEL 36
3.3.3 AVERAGE VOLTAGE DROP AFTER DISCHARGES 37
3.3.4 MICROSCOPIC STRUCTURES OF DISCHARGES 39
3.3.5 CONCLUSIONS 41
3.4 DESCRIPTION OF THE CONSTRUCTED FLOATING STRIP MICROMEGAS 41
3.4.1 6.4 X 6.4
CM
2
DETECTOR WITH DISCRETE CAPACITORS 42
3.4.2 6.4 X 6.4
CM
2
FLOATING STRIP MICROMEGAS DOUBLET WITH LOW MATERIAL
BUDGET 43
3.4.3 48 X 50 CM
2
INTEGRATED FLOATING STRIP MICROMEGAS 45
4 METHODS 47
4.1 READOUT ELECTRONICS 47
4.1.1 GASSIPLEX BASED READOUT ELECTRONICS 48
4.1.2 APV25 BASED SCALABLE READOUT SYSTEM 49
4.1.3 MERGING OF DATA ACQUIRED WITH DIFFERENT READOUT SYSTEMS 49
4.2 GAS MIXTURE AND PRESSURE CONTROL SYSTEM 51
4.3 SIGNAL AND CLUSTER RECONSTRUCTION 51
4.4 TRACK RECONSTRUCTION ALGORITHMS 55
4.4.1 THE CHAIN ALGORITHM 55
*4.4.2 HOUGH TRANSFORM ALGORITHM 56
*-~4.4.3 ANALYTIC TRACK FITTING 58
4.5 DETERMINATION OF SPATIAL RESOLUTION 58
4.5.1 THREE LAYER METHOD 58
4.5.2 GEOMETRIC MEAN METHOD 59
4.5.3 TRACK INTERPOLATION METHOD 60
4.5.4 COMPARISON OF THE THREE METHODS 60
4.6 DETECTION EFFICIENCY 61
4.7 DETECTOR ALIGNMENT 62
4.7.1 HIGH-PRECISION COORDINATE 63
4.7.2 DISTANCE 63
4.7.3 ROTATION AROUND THE 2-AXIS 64
CONTENTS XI
4.7.4 ROTATION AROUND THE Y-AXIS 65
4.8 SINGLE PLANE ANGLE RECONSTRUCTION - PTPC 65
4.8.1 THE METHOD 65
4.8.2 DATA POINT SELECTION AND WEIGHTING 66
4.8.3 DETERMINATION OF ANGULAR RESOLUTION 68
4.8.4 SYSTEMATIC UNCERTAINTIES OF THE METHOD 69
4.8.5 INVERTING THE METHOD - DETERMINATION OF ELECTRON DRIFT VELOCITIES
. . 73
4.8.6 DIRECT DETERMINATION OF ELECTRON DRIFT VELOCITIES 73
5 FLOATING STRIP MICROMEGAS CHARACTERIZATION MEASUREMENTS 77
5.1 MICROMEGAS BASED TRACK TELESCOPE IN HIGH-ENERGY PION AND MUON BEAMS
78
5.1.1 SETUP 78
5.1.2 PULSE HEIGHT BEHAVIOR 80
5.1.3 EFFICIENCY 81
5.1.4 SPATIAL RESOLUTION 85
5.1.5 DISCHARGE BEHAVIOR 87
5.1.6 SUMMARY 88
5.2 LARGE FLOATING STRIP MICROMEGAS IN HIGH-ENERGY PION BEAMS 88
5.2.1 SETUP 89
5.2.2 PULSE HEIGHT BEHAVIOR 91
. 5.2.3 EFFICIENCY 92
5.2.4 PRESSURE-INDUCED DRIFT GAP DEFORMATION 94
5.2.5 ANGULAR RESOLUTION 97
5.2.6 SPATIAL RESOLUTION 101
5.2.7 DISCHARGE BEHAVIOR 103
5.2.8 SUMMARY 104
5:3 COSMIC MUON TRACKING WITH A FLOATING STRIP MICROMEGAS IN HIGH-RATE
PROTON
BACKGROUND 105
5.3.1 SETUP 106
5.3.2 GAS GAIN AND MESH TRANSPARENCY 106
5.3.3 PROTON OCCUPANCY AND RATE 109
5.3.4 MUON TRACK RECONSTRUCTION 112
5.3.5 SPATIAL RESOLUTION 113
5.3.6 MUON EFFICIENCY 115
5.3.7 DISCHARGE BEHAVIOR 116
5.3.8 SUMMARY 117
5.4 ION BACKFLOW AND AGING MEASUREMENTS WITH A RESISTIVE STRIP
MICROMEGAS . . 118
XII CONTENTS
9
5.4.1 SETUP 118
5.4.2 ION BACK FLOW MEASUREMENT 119
5.4.3 SUMMARY 120
6 SPECIFIC APPLICATIONS OF FLOATING STRIP MICROMEGAS 121
6.1 FLOATING STRIP MICROMEGAS IN HIGH-RATE 20 MEV PROTON BEAMS 121
6.1.1 SETUP 122
6.1.2 PARTICLE RATE AND FLUX DETERMINATION 123
6.1.3 PULSE HEIGHT BEHAVIOR 124
6.1.4 EFFICIENCY 129
6.1.5 ANGULAR RESOLUTION 131
6.1.6 SPATIAL RESOLUTION 133
6.1.7 MEASUREMENT OF ELECTRON DRIFT VELOCITIES 135
6.1.8 DISCHARGE BEHAVIOR 136
6.1.9 SUMMARY 136
6.2 FLOATING STRIP MICROMEGAS TRACKING SYSTEM FOR HIGH-RATE PROTON AND
CARBON
BEAM DIAGNOSTICS 137
6.2.1 SETUP 138
6.2.2 ACCELERATOR AND BEAM CHARACTERIZATION 139
6.2.3 TRACK RECONSTRUCTION AND MULTI-HIT RESOLUTION 144
6.2.4 PULSE HEIGHT BEHAVIOR 146
6.2.5 EFFICIENCY 150
6.2.6 SPATIAL RESOLUTION 152
6.2.7 DISCHARGE BEHAVIOR 156
6.2.8 SUMMARY AND OUTLOOK 158
7 PERFORMANCE AND PROPERTIES OF MICROMEGAS 161
7.1 GAS T3AIN 161
7.2 MESH TRANSPARENCY 163
7.3 DETECTION EFFICIENCY 165
7.4 SINGLE PLANE ANGLE RECONSTRUCTION - PTPC 168
7.5 SPATIAL RESOLUTION 170
7.6 DISCHARGE BEHAVIOR 171
7.7 HIGH-RATE CAPABILITY 173
7.8 POSSIBLE IMPROVEMENTS 173
7.8.1 DETECTOR DESIGN 173
7.8.2 DETECTOR OPERATIONAL PARAMETERS 174
7.8.3 READOUT ELECTRONICS 174
CONTENTS XIII
8 SUMMARY 177
BIBLIOGRAPHY 181
A READOUT ELECTRONICS AND SERVICES 191
A.L GASSIPLEX BASED READOUT SYSTEM 191
A.2 APV25 BASED SCALABLE READOUT SYSTEM 192
A.3 FLEXIBLE SYSTEM FOR GAS MIXING AND PRESSURE CONTROL 193
B MATHEMATIC METHODS AND ALGORITHMS 195
B.L HOUGH TRANSFORM ALGORITHM 195
B.2 ANALYTIC LINE FIT AND ITS UNCERTAINTY 196
B.3 HISTOGRAM BINNING FOR TRANSFORMED VARIABLES 197
B.4 PROBABILITY FOR A RANDOM BACKGROUND HIT WITHIN AN ACQUISITION WINDOW
. . 199
C SUPPLEMENTARY MATERIAL - APPLICATIONS OF FLOATING STRIP MICROMEGAS 201
C.L TRACKING OF 20 MEV PROTONS WITH FLOATING STRIP MICROMEGAS 201
C.L.L ANGULAR RESOLUTION 201
C.L.2 SPATIAL RESOLUTION 201
C.L.3 DISCHARGE BEHAVIOR 205
C.2 CHARACTERIZATION OF HIGH-RATE PROTON AND CARBON BEAMS WITH FLOATING
STRIP
MICROMEGAS - DISCHARGE BEHAVIOR 206
|
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| spelling | Bortfeldt, Jonathan Verfasser aut Development of floating strip micromegas detectors Jonathan Bortfeldt 2014 XIV, 207 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier München, Univ., Diss., 2014 Langzeitarchivierung gewährleistet, LZA (DE-588)4113937-9 Hochschulschrift gnd-content Erscheint auch als Online-Ausgabe urn:nbn:de:bvb:19-169727 https://nbn-resolving.org/urn:nbn:de:bvb:19-169727 Resolving-System kostenfrei Volltext http://d-nb.info/1052015425/34 Langzeitarchivierung Nationalbibliothek DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=027449334&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Bortfeldt, Jonathan Development of floating strip micromegas detectors |
| subject_GND | (DE-588)4113937-9 |
| title | Development of floating strip micromegas detectors |
| title_auth | Development of floating strip micromegas detectors |
| title_exact_search | Development of floating strip micromegas detectors |
| title_full | Development of floating strip micromegas detectors Jonathan Bortfeldt |
| title_fullStr | Development of floating strip micromegas detectors Jonathan Bortfeldt |
| title_full_unstemmed | Development of floating strip micromegas detectors Jonathan Bortfeldt |
| title_short | Development of floating strip micromegas detectors |
| title_sort | development of floating strip micromegas detectors |
| topic_facet | Hochschulschrift |
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