The Dynamics of Electrons in Linear Plasma Devices and Its Impact on Plasma Surface Interaction (eBook)

Supervisor’s Foreword 6
Abstract 8
List of PublicationsPapersS. Elgriw, M. Hubeny, A. Hirose and C. Xiao, Effect of resonant magnetic perturbations on edge plasma parameters in the STOR-M tokamak, Radiat. Eff. Defects S., in press (2018)M. Rack, D. Höschen, D. Reiter, B. Unterberg, J. W. Coenen, S. Brezinsek, O. Neubauer, S. Bozhenkov, G. Czymek, Y. Liang, M. Hubeny, Ch. Linsmeier, and the Wendelstein 7-X Team, Probe manipulators for Wendelstein 7-X and their interaction with the magnetic topology, Plasma Sci. Technol., Vol. 20, No. 5 (2018)M. Hubeny, B. Schweer, D. Lugenhölscher, U. Czarnetzki, B. Unterberg, Thomson scattering of plasma turbulence on PSI-2, Nucl. Mater. Energy, Vol. 12, pp. 1253–1258 (2017)X. Jiang, G. Sergienko, N. Gierse, M. Hubeny, A. Kreter, S. Brezinsek, Ch. Linsmeier, Design and development of a LIBS system on linear plasma device PSI-2 for in situ real-time diagnostics of plasma-facing materials, Nucl. Mater. Energy, Vol. 12, pp. 1224–1230 (2017)N. Gierse, M. Z. Tokar, S. Brezinsek, T. F. Giesen, M. Hubeny, A. Huber, V. Philipps, A. Pospieszczyk, G. Sergienko, J. Wegner, Q. Xiao, U. Samm, Ch. Linsmeier and the TEXTOR Team Time resolved imaging of laser induced ablation spectroscopy (LIAS) in TEXTOR and comparison with modeling Physica Scripta, Vol. 167, 014034 (2016)A. Terra, G. Sergienko, M. Hubeny, A. Huber, Ph. Mertens, V. Philipps and the TEXTOR Team, High heat-flux self-rotating plasma-facing component: Concept and loading test in TEXTOR, Journal of Nuclear Materials, Vol. 463, pp. 1252–1255 (2015)O. Mitarai, Y. Ding, M. Hubeny, et al., Plasma current sustainment after iron core saturation in the STOR-M tokamak, Fusion Eng. Des., Vol. 89, pp. 2467–2471 (2014)M. Dreval, M. Hubeny, et al., Plasma confinement modification and convective transport suppression in the scrape-off layer using additional gas puffing in the STOR-M tokamak, Plasma Phys. Contr. F., Vol. 55, 035004 (2013)S. Elgriw, C. Xiao, M. Hubeny, et al., Studies of Resonant Magnetic Perturbations in the STOR-M Tokamak, 39 th EPS Conference (2012)TalksM. Hubeny et al., Turbulence evaluation at PSI-2 by fast visible imaging, DPG 2014, BerlinM. Hubeny et al., Turbulence evaluation at PSI-2 by fast visible imaging, TEC-Meeting 2014, GhentM. Hubeny et al., Turbulence evaluation at PSI-2, DPG 2015, BochumM. Hubeny et al., Thomson Scattering of Plasma Turbulence at PSI-2, PMIF 2015, JülichM. Hubeny et al., Thomson Scattering of Plasma Turbulence on PSI-2, Gaseous Electronic Conference (GEC) 2016, BochumPostersM. Hubeny et al., Thomson Scattering of Plasma Turbulence on PSI-2, Plasma-Surface-Interactions (PSI) 2016, RomeM. Hubeny et al., Time-resolved Thomson Scattering of Plasma Filaments in PSI-2, Plasma-Facing Materials and Components (PFMC) 2017, Neuss 10
Acknowledgements 12
Contents 13
1 Introduction 15
References 21
2 Plasma Wall Transition Dynamics 23
2.1 Plasma Wall Interactions 24
2.2 Drift Wave Instability and Turbulence 26
2.3 Intermittent Edge Plasma Transport 28
2.4 Diagnostics for Edge Plasma Turbulence 31
References 32
3 Laser Light Scattering as Plasma Diagnostic 36
3.1 Laser Scattering 36
3.1.1 Rayleigh and Raman Scattering 42
3.2 Laser Absorption 44
References 45
4 Experimental Setup on PSI-2 46
4.1 PSI-2 46
4.2 Langmuir Probe 48
4.3 Fast Camera 51
References 53
5 Thomson Scattering Setup 54
5.1 Light Source and Beam Path 54
5.2 Triple Grating Spectrometer 57
5.2.1 iCCD Camera 59
5.2.2 Radiometric Calibration 59
5.2.3 Timing 62
5.2.4 Spatial Calibration 64
References 65
6 Data Analysis and Calibration 66
6.1 Spectral Calibration and Resolution 66
6.2 Absolute Calibration with Raman Scattering 70
6.3 Thomson Scattering 73
6.4 Photon Counting 74
6.5 Signal Processing 79
6.6 Conditional Average 81
References 82
7 Steady State Plasma Results 84
7.1 System Stability 84
7.2 Steady State Plasma Profiles 89
7.2.1 Argon Discharges 90
7.2.2 Neon and Helium Discharges 92
7.2.3 Deuterium Discharges 93
7.2.4 Discussion 94
References 96
8 Plasma Turbulence Results 98
8.1 Plasma Dynamics 98
8.1.1 Fourier and Mode Analysis 101
8.1.2 Statistical Analysis and Conditional Average 107
8.2 Conditionally Averaged Thomson Scattering 114
8.2.1 Coherent Oscillations in Argon Discharges 114
8.2.2 Intermittent Bursts in Deuterium Discharges 118
8.2.3 Discussion 122
8.3 Impact of Hot Plasma Filaments on PWI Processes 124
References 129
9 Summary and Conclusion 131
9.1 Outlook and Future Directions 134
Curriculum Vitae 136