Radial electric field studies in the plasma edge of ASDEX upgrade:
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
2012
|
| Schlagworte: | |
| Online-Zugang: | kostenfrei http://d-nb.info/1042899843/34 kostenfrei Inhaltsverzeichnis |
| Beschreibung: | X, 113 S. Ill., graph. Darst. |
| Format: | Langzeitarchivierung gewährleistet, LZA |
Internformat
MARC
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| 245 | 1 | 0 | |a Radial electric field studies in the plasma edge of ASDEX upgrade |c Eleonora Viezzer |
| 264 | 1 | |c 2012 | |
| 300 | |a X, 113 S. |b Ill., graph. Darst. | ||
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| 337 | |b n |2 rdamedia | ||
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| 502 | |a München, Univ., Diss., 2013 | ||
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Datensatz im Suchindex
| _version_ | 1804151454622023680 |
|---|---|
| adam_text | CONTENTS
1 INTRODUCTION 1
1.1 FUSION - AN OPTION FOR A SAFE
LONG-TERM ENERGY SUPPLY 1
1.2 H-MODE IN TOKAMAKS 2
1.3 EARLIER RESULTS AND SCOPE OF THIS THESIS 4
2 THEORETICAL BACKGROUND ON THE RADIAL ELECTRIC FIELD AT THE PLASMA EDGE
7
2.1 PARTICLE MOTION AND COLLI
SIONAL TRANSPORT IN A TOKAMAK 7
2.1.1 PARTICLE DRIFTS IN A MAGNETIC FIELD 7
2.1.2 COLLISIONAL TRANSPORT IN A FUSION PLASMA 9
2.2 THEORETICAL DESCRIPTION OF PLASMA FLOWS AND THE RADIAL ELECTRIC
FIELD 10
2.2.1 BASIC EQUATIONS AND AMBIPOLARITY CONDITION 10
2.2.2 NEOCLASSICAL POLOIDAL ROTATION 14
2.3 THE HIGH-CONFINEMENT MODE (H-MODE) 15
2.3.1 EDGE TRANSPORT BARRIER
(ETB) 15
2.3.2 EDGE LOCALIZED MODES (ELMS) 17
2.3.3 TURBULENCE SUPPRESSION IN SHEARED PLASMA FLOWS 18
3 EDGE DIAGNOSTICS AND EXPERIMENTAL TECHNIQUES AT ASDEX UPGRADE 21
3.1 MEASUREMENTS OF PLASMA PARAMETERS 21
3.1.1 CHARGE EXCHANGE RECOMBINATION
SPECTROSCOPY (CXRS) 22
3.1.2 DOPPLER REFLECTOMETRY 24
3.1.3 ELECTRON TEMPERATURE AND DENSITY MEASUREMENTS 26
3.2 RADIAL PLASMA SWEEP TECHNIQUE 29
3.3 PROFILE ALIGNMENT 29
4 THE EDGE CXRS DIAGNOSTICS AT ASDEX UPGRADE 33
4.1 CXRS MEASUREMENTS AT THE LOW-FIELD SIDE
OF AUG 33
4.1.1 TOROIDAL EDGE CXRS SYSTEM 33
4.1.2 POLOIDAL EDGE
CXRS SYSTEM 36
4.2 CXRS MEASUREMENTS AT THE HIGH-FIELD SIDE
OF AUG 38
4.3 CHARACTERIZATION AND CALIBRATION OF CXRS DIAGNOSTICS 40
4.4 VALIDATION OF CXRS MEASUREMENTS 46
4.5 CORRECTIONS TO CXRS MEASUREMENTS 46
HTTP://D-NB.INFO/1043864768
X
CONTENTS
4.5.1 CHARGE EXCHANGE
CROSS-SECTION EFFECT 47
4.5.2 CORRECTION DUE TO ZEEMAN SPLITTING 53
5 THE STRUCTURE OF THE EDGE RADIAL ELECTRIC FIELD AT ASDEX UPGRADE 55
5.1 DERIVATION OF THE RADIAL ELECTRIC FIELD AT THE PLASMA EDGE
OF ASDEX UPGRADE
. 55
5.2 VALIDATION OF THE RADIAL ELECTRIC FIELD MEASUREMENTS 58
5.2.1 COMPARISON OF DIFFERENT IMPURITY SPECIES 58
5.2.2 COMPARISON TO DOPPLER REFLECTOMETRY MEASUREMENTS 59
5.3 RADIAL ELECTRIC FIELD AT THE INNER AND
OUTER MIDPLANE 62
5.3.1 CXRS MEASUREMENTS AT THE HFS 62
5.3.2 ELECTROSTATIC POTENTIAL AT THE HFS AND COMPARISON TO THE LFS 66
6 CONNECTIONS BETWEEN THE RADIAL ELECTRIC FIELD AND THE EDGE TRANSPORT
BARRIER 69
6.1 COMPARISON OF E
R
TO THE MAIN ION PRESSURE GRADIENT
TERM 69
6.2 RADIAL ELECTRIC FIELD PROFILES IN DIFFERENT
CONFINEMENT REGIMES 72
6.3 INTERDEPENDENCES BETWEEN E
R
,
ITS SHEAR AND PEDESTAL PARAMETERS 73
6.4 TEMPORAL EVOLUTION OF E
R
DURING AN ELM CYCLE 79
6.5 EFFECT OF MAGNETIC PERTURBATIONS ON THE EDGE RADIAL
ELECTRIC FIELD 81
7 COMPARISON TO NEOCLASSICAL THEORY 87
7.1 PREVIOUS RESULTS FROM OTHER TOKAMAKS 87
7.2 EXPERIMENTAL TESTS OF POLOIDAL FLOWS AGAINST NEOCLASSICAL THEORY 88
7.2.1 POLOIDAL MAIN ION ROTATION VELOCITY 89
7.2.2 MEASURED IMPURITY FLOWS IN COMPARISON WITH NEOCLASSICAL
SIMULATIONS 91
7.3 SIMULATION OF LOW COLLISIONALITY PLASMAS 95
8 SUMMARY AND DISCUSSION 97
8.1 SUMMARY AND CONCLUSIONS 97
8.2 DIRECTIONS FOR FUTURE WORK 100
ACKNOWLEDGEMENTS 101
BIBLIOGRAPHY 103
LIST OF PUBLICATIONS 111
|
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| indexdate | 2024-07-10T00:55:05Z |
| institution | BVB |
| language | English |
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| physical | X, 113 S. Ill., graph. Darst. |
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| spelling | Viezzer, Eleonora Verfasser aut Radial electric field studies in the plasma edge of ASDEX upgrade Eleonora Viezzer 2012 X, 113 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier München, Univ., Diss., 2013 Langzeitarchivierung gewährleistet, LZA (DE-588)4113937-9 Hochschulschrift gnd-content Erscheint auch als Online-Ausgabe urn:nbn:de:bvb:19-161574 https://nbn-resolving.org/urn:nbn:de:bvb:19-161574 Resolving-System kostenfrei Volltext http://d-nb.info/1042899843/34 Langzeitarchivierung Nationalbibliothek http://edoc.ub.uni-muenchen.de/16157/ Verlag kostenfrei DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=026815113&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Viezzer, Eleonora Radial electric field studies in the plasma edge of ASDEX upgrade |
| subject_GND | (DE-588)4113937-9 |
| title | Radial electric field studies in the plasma edge of ASDEX upgrade |
| title_auth | Radial electric field studies in the plasma edge of ASDEX upgrade |
| title_exact_search | Radial electric field studies in the plasma edge of ASDEX upgrade |
| title_full | Radial electric field studies in the plasma edge of ASDEX upgrade Eleonora Viezzer |
| title_fullStr | Radial electric field studies in the plasma edge of ASDEX upgrade Eleonora Viezzer |
| title_full_unstemmed | Radial electric field studies in the plasma edge of ASDEX upgrade Eleonora Viezzer |
| title_short | Radial electric field studies in the plasma edge of ASDEX upgrade |
| title_sort | radial electric field studies in the plasma edge of asdex upgrade |
| topic_facet | Hochschulschrift |
| url | https://nbn-resolving.org/urn:nbn:de:bvb:19-161574 http://d-nb.info/1042899843/34 http://edoc.ub.uni-muenchen.de/16157/ http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=026815113&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
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