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

Supervisor’s Foreword

Abstract

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

Acknowledgements

Contents

1 Introduction

References

2 Plasma Wall Transition Dynamics

2.1 Plasma Wall Interactions

2.2 Drift Wave Instability and Turbulence

2.3 Intermittent Edge Plasma Transport

2.4 Diagnostics for Edge Plasma Turbulence

References

3 Laser Light Scattering as Plasma Diagnostic

3.1 Laser Scattering

3.1.1 Rayleigh and Raman Scattering

3.2 Laser Absorption

References

4 Experimental Setup on PSI-2

4.1 PSI-2

4.2 Langmuir Probe

4.3 Fast Camera

References

5 Thomson Scattering Setup

5.1 Light Source and Beam Path

5.2 Triple Grating Spectrometer

5.2.1 iCCD Camera

5.2.2 Radiometric Calibration

5.2.3 Timing

5.2.4 Spatial Calibration

References

6 Data Analysis and Calibration

6.1 Spectral Calibration and Resolution

6.2 Absolute Calibration with Raman Scattering

6.3 Thomson Scattering

6.4 Photon Counting

6.5 Signal Processing

6.6 Conditional Average

References

7 Steady State Plasma Results

7.1 System Stability

7.2 Steady State Plasma Profiles

7.2.1 Argon Discharges

7.2.2 Neon and Helium Discharges

7.2.3 Deuterium Discharges

7.2.4 Discussion

References

8 Plasma Turbulence Results

8.1 Plasma Dynamics

8.1.1 Fourier and Mode Analysis

8.1.2 Statistical Analysis and Conditional Average

8.2 Conditionally Averaged Thomson Scattering

8.2.1 Coherent Oscillations in Argon Discharges

8.2.2 Intermittent Bursts in Deuterium Discharges

8.2.3 Discussion

8.3 Impact of Hot Plasma Filaments on PWI Processes

References

9 Summary and Conclusion

9.1 Outlook and Future Directions

Curriculum Vitae