4a) 4th School and Workshop on Fusion Physics and Technology

Since 2002 the Association is organizing, on an annual basis, a meeting on Fusion Physics and Technology. This is an activity aiming at educating students (from diverse institutions and with diverse background) on basic aspects of Fusion Physics and Technology, of informing them of the scientific and technological advances on the subject (primarily, those related to the work of the research teams of the Association). Furthermore, it serves to bring together scientists and graduate students from all participating institutions, presenting seminars and posters on their recent research.

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During the reporting period, The Administrative Committee of the Research Unit of the Association and the University of Thessaly organized the “Fourth School and Workshop on Fusion Physics and Technology”, held in Volos from 18 to 22 April 2005. During this 5-day school, a series of lectures was given by distinguished visiting scholars (in alphabetical order: Balden M., Bartlett D., Bruhns H., Maget P., Pamela J., Papastergiou S., Tavassoli F.), as well as by the scientific personnel of the Association. In addition, two afternoon Poster sessions were devoted to the presentation of the current research activities of the participating Research Teams. The audience consisted of graduate students and young scientists (mostly, affiliated with the Research Unit), as well as students interested in participating in fusion activities. In order of presentation, the following talks were given:

Monday 18 April 2005

J. Vomvoridis, Introduction to controlled thermonuclear fusion

D. Bartlett (EC), The European Fusion Programme: motivation, status and outlook

Th. Grammenos and A. Grecos, Elements of Plasma Physics and Magnetohydromechanics

Gr. Haidemenopoulos, Materials in high temperatures

Tuesday 19 April 2005

Μ. Balden (IPP), The problematic choice of plasma-facing materials

F. Tavassoli (CEA), Present limits and improvements of structural materials for fusion reactors

I. Stamatelatos, Evaluation of low activation materials for fusion

J. Pamela (EFDA-JET), JET: overview of recent results and aims for 2005-2006 and beyond

Κ. Mergia, Fusion materials related research activities of the Hellenic Association

H. Bruhns (U. of Heidelberg), Concepts of fusion devices

Wednesday 20 April 2005

S. Papastergiou (ENEA), Spherical Tokamaks and the proto-sphera load assembly

M. Tsalas and N. Tsois, Plasma-surface interaction in fusion devices

G. Breyannis and D. Valougeorgis, Simulation of 3D isotropic MHD turbulence with kinetic schemes

Η. Bruhns (U. of Heidelberg), Energy policy and Energy systems for Europe

Thursday 21 April 2005

G. Throumoulopoulos, Ideal and resistive magnetohydrodymanics

P. Lalousis, Fluids and plasmas: The MHD Riemann problem

K. Hitzanidis, Transport phenomena in magnetically confined plasmas

P. Maget (CEA), Steady state tokamak plasma physics and MHD studies in Tore Supra

N. Vlachos, Turbulence models for CFD modelling of MHD flows

L. Vlahos, Non-linear development of instabilities in plasma

Friday 22 April 2005

I. Sarris, C. Dritselis and N. Vlachos, LES modelling of MHD liquid metal flows

A. Anastasiadis, Study of fusion processes with sand pile models

G. Poulipoulis, Tokamak steady states with anisotropic resistivity and toroidal flow

Y. Kominis, Phase space methods for analyzing gyrotron devices

D. Fidaros and N. Vlachos, CFD modelling of MHD flow in a cylinder with a rotating disk-wall

N. Pelekasis, MHD stability and bifurcation diagrams in Hartmann flows

I. Sandberg, Drift instabilities and turbulent structures in magnetically confined plasmas

Η. Isliker, Numerical solutions of partial differential equations with the pseudo-spectral method

G. Anastasiou and J. Vomvoridis, Interaction of a planar electronic beam with gaussian microwave field of a gyrotron

4b) Other Fusion-Related Educational Activities in Greece

During year 2005, a total of 16 graduate students were enrolled in the participating Universities, with fusion-related subjects. Of these, 4 students were participating in M.Sc. level programmes and 12 in Ph.D. programmes. Of the latter, 3 Ph. D. degrees were awarded during 2005.

In addition, the following courses were given by faculty members (affiliated with the Association) to students, for education and training in fusion-related disciplines, in the frame of their University Curricula (hours per week per semester):

• NTUA: Plasma Waves, 13  4 hours per semester (undergraduate),

• NTUA: Beams and High-Power Microwaves, 13  4 hours per semester (undergraduate),

• NTUA: Plasma Kinetic Theory, 13  3 hours per semester (graduate),

• U. of Athens: Plasma Physics, 13  4 hours per semester (undergraduate),

• U. of Ioannina: Introduction to Plasma Physics, 13  4 hours per semester times 2 semesters (undergraduate),

• U. of Ioannina: Energy Resources, 13  4 hours per semester (undergraduate) (one third of the course concerns Fusion),

• U. of Thessaly: Kinetic Theory and Non-equilibrium Flows, 14  3 hours per semester (graduate),

• U. of Thessaloniki: Plasma Physics, 13  4 hours per semester (undergraduate),

• U. of Thrace: Technology I, 13  4 hours per semester (undergraduate) (one third of the course covers Principles of Controlled Thermonuclear Fusion and Controlled Fusion Devices).

Of these courses, the Plasma courses, in addition to providing the general background material, contain fusion as a discrete entity, while the one on Beams and High-Power Microwaves focuses on the physics of fusion plasma heating devices.

4c) 2005 Expenditures and Personnel

The activities of the Association are funded (by about equal amounts) by the Fusion Programme of the European Union, by the General Secretariat of Research and Technology and by the participating Research Centres and University. The total expenditures of the Association in year 2005 are presented in the following table, rounded to kEuro (with the same figures for the previous two years, as well as the 2006 budget, for the purpose of comparison):

The personnel of the Association for year 2005 is presented in the following table (in Full-time equivalent), including both physics and technology):

4d) 2005 Publications

Part of the work of the Association has been presented in the following articles (ordered according to the work programme), which have appeared (or, have been accepted for publication) during year 2005: 

1. J. L. Vomvoridis, An overview of gyrotron-related work in Greece, RF 2005, 7th Workshop on High Energy Density and High Power RF; AIP Conference Proceedings, vol. 807, pp. 46-54, D. K. Abe and G. S. Nusinovich Eds., Kalamata, Greece, 13-17 June 2005.
2. G. E. Anastasiou and J. L. Vomvoridis, Self-consistent post-amplification of a gyrotron rf beam by a sheet electron beam, RF 2005, 7th Workshop on High Energy Density and High Power RF; AIP Conference Proceedings, vol. 807, pp. 279-284, D. K. Abe and G. S. Nusinovich Eds., Kalamata, Greece, 13-17 June 2005.
3. J. G. Pagonakis and J. L. Vomvoridis, Three-Dimensional self-consistent electrostatic simulations of gyrotron beam tunnel assemblies, RF 2005, 7th Workshop on High Energy Density and High Power RF; AIP Conference Proceedings, vol. 807, pp. 271-278, D. K. Abe and G. S. Nusinovich Eds., Kalamata, Greece, 13-17 June 2005.
4. G. P. Latsas, G. P. Anastasiou, Z. Ioannidis, and I. G. Tigelis, Studies on the electromagnetic spectrum of corrugated waveguides, RF 2005, 7th Workshop on High Energy Density and High Power RF; AIP Conference Proceedings, vol. 807, pp. 257-263, D. K. Abe and G. S. Nusinovich Eds., Kalamata, Greece, 13-17 June 2005.
5. K. A. Avramides, J. L. Vomvoridis, and C. T. Iatrou, Coaxial gyrotron cavities with resistive corrugated insert for powerful second-harmonic operation, RF 2005, 7th Workshop on High Energy Density and High Power RF; AIP Conference Proceedings, vol. 807, pp. 264-270, D. K. Abe and G. S. Nusinovich Eds., Kalamata, Greece, 13-17 June 2005. 
6. Y. Kominis, O. Dumbrajs, K. Α. Avramides, K. Hizanidis and J. L. Vomvoridis, Canonical perturbation theory for complex electron dynamics in gyrotron resonators, Physics of Plasmas 12, 113102 (2005).
7. Y. Kominis, K. Hizanidis and A. K. Ram, Transient dynamics of charged particles interacting with localized waves of continuous spectra, Physical Review Letters 96, 025002 (2006).
8. O. Dumbrajs, Y. Kominis, K. Α. Avramides, K. Hizanidis and J. L. Vomvoridis, Dynamics and output momentum spectrum under harmonic resonance in gyrotron resonators, RF 2005, 7th Workshop on High Energy Density and High Power RF; AIP Conference Proceedings, vol. 807, pp. 232-237, D. K. Abe and G. S. Nusinovich Eds., Kalamata, Greece, 13-17 June 2005.
9. Y. Kominis, O. Dumbrajs, K. Α. Avramides, K. Hizanidis and J. L. Vomvoridis, Canonical perturbation theory for complex electron dynamics in gyrotron resonators, Physics of Plasmas 12, 113102 (2005).
10. M. Tsalas, N. Tsois, V. Rohde, J. Neuhauser and the ASDEX Upgrade Team, Langmuir probe measurements in the lower x-point vicinity of the ASDEX Upgrade divertor, Journal of Nuclear Materials 337-339, p751 (2005).
11. S. Gunter et. al. (incl. M. Tsalas), Overview of ASDEX Upgrade results - development of integrated operating scenarios for ITER, Nuclear Fusion 45, pS98-S108 (2005).
12. M. Tsalas, N. Tsois, V. Bobkov, A. Herrman, H. W. Muller, J. Neuhauser, V. Rohde and the ASDEX Upgrade Team, Plasma drift velocity measurements near the ASDEX Upgrade lower x-point, 32nd EPS Conference on Plasma Physics, 25-29 June 2005, Tarragona, Spain.
13. H. W. Muller, V. Bobkov, V. Rohde, M. Maraschek, J. Neuhauser, A. Schmid, M. Tsalas and the ASDEX Upgrade Team, Plasma flow in the scrape-off layer of ASDEX Upgrade, 32nd EPS Conference on Plasma Physics, 25-29 June 2005, Tarragona, Spain.
14. D. P. Coster, A. Chankin, G. Conway, L. Horton, L. Kaveeva, C. Konz, J. Neuhauser, M. Reich, T. Ribeiro, V. Rozhansky, J. Schirmer, B. D. Scott, M. Tsalas, S. Voskoboynikov and the ASDEX Upgrade team, Edge simulations of an ASDEX Upgrade Ohmic shot, 32nd EPS Conference on Plasma Physics, 25-29 June 2005, Tarragona, Spain.
15. C. Tsironis and L. Vlahos, Anomalous particle transport and self-consistent wave evolution of magnetized electrons interacting with electron-cyclotron waves, 2nd IAEA Technical Meeting on the Theory of Plasma Instabilities, 2-5 March 2005, Trieste, Italy.
16. C. Tsironis and L. Vlahos, Nonlinear and self-consistent treatment of ECRH, 32nd EPS Conference on Plasma Physics, 25-29 June 2005, Tarragona, Spain.
17. I. E. Sarris, S. C. Kakarantzas, A. P. Grecos and N. S. Vlachos, MHD natural convection in a laterally and volumetrically heated square cavity, International Journal of Heat and Mass Transfer 48, 3443 (2005).
18. S. C. Kakarantzas, A. P. Grecos, N. S. Vlachos, I. E. Sarris, B. Knaepen, D. Carati Direct numerical simulation of an efficient configuration for fusion heat removal blankets, ECOS2006 - Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, Crete, Greeece, 12-14 July 2006.
19. I. Sandberg, Explicit threshold of the toroidal ion temperature gradient mode stability, Physics of Plasmas 12, 050101 (2005).
20. I. Sandberg, H. Isliker, V. P. Pavlenko, K. Hizanidis, and L. Vlahos, Fluid simulations of toroidal ion temperature gradient turbulence, Physics of Plasmas 13, 022311 (2006).
21. G. Breyiannis and D. Valougeorgis, Lattice kinetic simulations in three-dimensional MHD turbulence, to appear in Computers and Fluids (2006).
22. S. Naris, Gas flows in nano- and micro-configurations via upgraded kinetic type discrete velocity algorithms, Ph.D. Thesis, University of Thessaly, 2005 (in Greek).
23. N. Pelekasis, Bifurcation diagrams, linear stability analysis and dynamic simulations of free convection in a differentially heated cavity in the presence of a magnetic field, to appear in Physics of Fluids (2006).
24. I. E. Sarris, G. Zikos, A. P. Grecos and N. S. Vlachos, On the limits of validity of the low magnetic Reynolds number approximation in MHD natural convection heat transfer, to appear in Numerical Heat Transfer: Part B – Fundamentals (2006).
25. G. Breyiannis and D. Valougeorgis, Lattice kinetic schemes in toroidal geometry, 33rd Conference on Plasma Physics, Rome, 2006.
26. H. Tasso, G. N. Throumoulopoulos, Elliptic and hyperelliptic magnetogydrodynamic equilibria, 47th Annual Meeting of the APS Division of Plasma Physics, Denver 2005; Bulletin of the American Physical Society 50, 111 (2005).
27. G. Poulipoulis, G. N. Throumoulopoulos, H. Tasso, Axisymetric equilibria with anisotropic resistivity and toroidal flow, 47th Annual Meeting of the APS Divison of Plasma Physics, Denver 2005; Bulletin of the American Physical Society 50, 350 (2005).
28. G. Poulipoulis, G. N. Throumoulopoulos, H. Tasso, Axisymmetric equilibria with anisotropic resistivity and toroidal flow, to appear in Journal of Plasma Physics (2005).
29. G. Poulipoulis, G. N. Throumoulopoulos, H. Tasso, Toroidal flow-caused change in magnetic topology of equilibrium eigenstates, Physics of Plasmas 12, 042112 (2005).
30. E. A. Evangelidis and G. J. J. Botha, Relativistic Landau resonances, Journal of Geophysical Research 110, A02216 (2005).
31. E. A. Evangelidis and G. J. J. Botha, Angular Momentum Coupling in Tokamaks, Proceedings European Physical Society, Taragona 2005.
32. S. E. Sharapov, B. Alper, Y. F. Baranov, H. L. Berk, D. Borba, C. Boswell, B. N. Breizman, C. D. Challis, M. de Baar, E. De La Luna, E. A. Evangelidis, S. Hacquin, N. Hawkes, V. G. Kiptily, S. D. Pinches, P. Sandquist, I. Voisekhovich, N. P. Young, and JET EFDA contributors, Alfvén cascades in JET discharges with NBI-heating, European Fusion Development Agreement, JET 9th IAEA TCM on Energetic Particles, Takayama, 9 – 11 November 2005.

4e) 2005 Co-operations and Mobility Missions

Most of the work of the Association is performed in collaboration with other Associations. This is facilitated both by the eligibility of this work for preferential support, under the provisions for “Projects for enhancing the mutual cooperation between Associations”, as well as by the Mobility scheme of the Euratom Fusion Programme. During year 2005, the following missions were undertaken by personnel of the Association: