Curriculum Vitae

Date of birth: 6 August 1959
Place of birth: Zwolle, The Netherlands


Professional career:

1983-1987: Junior Scientist in the Theory Department of the FOM-Instituut voor Plasmafysica  (head of department: Prof. F. Engelmann)
Research topics included the theory and simulation of wave propagation and absorption at the electron cyclotron resonance and its harmonics, transport code simulations of tokamak discharges with electron cyclotron resonance heating (ECRH), theory and simulations of sawtooth and tearing mode instabilities in tokamaks, and the stabilization of tearing modes by local heating or current drive. This research was carried out in the framework and in support of the ECRH experiments carried out by a team of FOM scientists and engineers on the TFR tokamak in Fontenay aux Roses near Paris. During this period several months were spent on attachment at the CEA in Fontenay aux Roses and at JET, in Abingdon, United Kingdom.
1988-1998: (Senior) Scientist in the Theory Department of the FOM-Instituut voor Plasmafysica  (head of department: Prof. T.J. Schep)
The first six months of 1988 were spent on attachment at JET, Abingdon, United Kingdom. In this period a report was prepared on the possible application of ECRH in high density JET discharges. The TORAY ray tracing code was installed on JET computers. Research continued to be focussed on ECRH and ECCD, and on the stabilization of tearing modes by local ECCD. Several studies were carried out for NET and later for ITER on the application of ECCD for mode stabilization in future tokamak reactors. This work was performed in close collaboration with Dr. G.R. Smith, LLNL, Livermore, USA, and Dr. G. Giruzzi, FOM and CEA, Cadarache, France. A Fokker-Planck code was developed and applied to ECCD calculations and non thermal electron studies with applications to the ECRH and ECCD experiments on the RTP tokamak at the FOM-Instituut. Part of this work was carried out by A.G. Peeters as a PhD student under my supervision (copromotor). Throughout this period close collaboration existed with the Experimental Department of the Institute concerning the experiments on RTP. In later years the research activities were broadened to include the theory and simulation of non-linear plasma dynamics and turbulence. In particular, drift vortices in the Hasegawa-Mima equation and various topics in electron magnetohydrodynamics (EMHD) were studied. For these studies different numerical codes were written, particle in cell and pseudo-spectral, respectively. The latter code was developed partly during a three month attachment at the Theoretische Physik I (Prof. K. Spatschek) of the Heinrich Heine University in Duesseldorf, Germany, in 1997. In May 1998 I was invited to visit the Institute for Aplied Physics in Nizhny Novgorod, Russia. The purpose of this visit was a collaboration with Dr. M.D. Tokman on fundamental aspects of the theory of wave propagation, and a number of lectures for the students of the IAP.
During this period, I have been copromotor on two occasions (TUE and UU), and have been a member of the promotion committee on one additional occasion (UU).
1994,1995, and 1997:
I have taught the course on Theoretical Plasma Physics (one semester, 2 lecture hours per week) for third or final year undergraduate, and first year graduate students at the University of Utrecht.
1999-2000: Senior Scientist in the Experimental Plasma Physics Department (head of department: Prof. F.C. Schueller)
In the department I am responsible for scientific co-ordination of the FOM experiments on TEXTOR within the Trilateral Euregio Cluster (TEC) collaboration. For this reason, I am on attachment at the Institut fuer Plasmaphysik (IPP) of the Forschungszentrum Juelich, Germany, for the period of 1999-2003. The emphasis of my own researches remains on ECRH, and ECCD, and on MHD mode stabilization. Apart from this, the researches on non-linear plasma dynamics are continued in collaboration with the Theory Department. Finally, I am participating in experiments on sawteeth and neoclassical tearing modes of the JET MHD-Task Force under the European Fusion Development Agreement (EFDA).
1999-2005: Member of the organization committee of the 4th through 7th biannual Carolus Magnus Summer School on Plasma Physics and Fusion Energy.
For the 4th school I served as scientific secretary and for the 7th school I served as chairman of the organization committee. The school’s aim is to provide PhD students working in the field of plasma physics for controlled thermonuclear fusion with a broad background in fusion plasma physics covering such diverse topics as kinetic theory, MHD equilibrium and instabilities, anomalous transport, diagnostic techniques, and plasma wall interactions. In line with the trends in fusion research in later years the topic of materials research for fusion has been added. From the very beginning of the school I have been associated with it as a lecturer.

2001-April 2002: Senior scientistis in the Electron Cyclotron Wave Physics group.
FOM “Rijnhuizen” underwent a major reorganization in which a group for Electron Cyclotron Wave Physics (ECW group) was formed within the Plasma Physics Department. The ECW group is responsible for the design, implementation, and operation of the FOM-ECRH systems on TEXTOR. The scientific work of the group concentrates on applications of ECRH and ECCD, in particular, for feedback control of instabilities and for current profile control and heating in reversed shear, advanced tokamak discharges (PhD project under my daily super vision).
Apart from my responsibilities in the ECW group, I remain responsible for the coordination of the FOM experiments under TEC.
May 2002-April 2007: Group leader of the ECW physics group.
During this period a major milestone was reached in the operation of the FOM-ECRH system at TEXTOR by the completion of the acceptance test of the new 140 GHz gyrotron (10 s, 800 kW on a stone load). Since then the 140 GHz gyrotron has been used for a variety of experiments, while the old 110 GHz remains operational only as the high power source for the Collective Thomson Scattering experiments in collaboration with the Risø CTS-team. I obtained the funding for a three year Dutch-Russian collaboration which apart from the ECW physics and technology groups at FOM-Rijnhuizen, involves scientists from the Institute of Applied Physics (RAS) in Nizhny Novgorod, Nizhny Novgorod University, and the Kurchatov Institute in Moscow. This project involves the physics of wave propagation, heating and current drive. As one of the results of this project a joint experiment on parametrically induced transparency is being planned involving the Nizhny Novgorod groups, the Risø CTS-team, and scientist from the Institute for Plasma Physics in Milano.
Currently the main focus of the ECW group is the control of MHD instabilities and plasma performance by localized heating and current drive. For this purpose a novel feedback control system is under development with at its heart an electron cyclotron emission diagnostic viewing along the same line of sight as the high power ECRH wave beam.
During this period I have supervised the work of three PostDocs and a PhD student.


April 2007-2009: As of the 1st of April 2007 the ECW group (largely based in Jülich) has been merged with the ECW technology group (based at the Institute in Nieuwegein) under the new leadership of Dr. M. De Baar.
Within the newly formed Tokamak Physics group I remain responsible for the theoretical research programme on ECRH and its applications and for the experimental research programme on ECRH on the TEXTOR tokamak in Jülich.

From 2010: Group leader for Computational Plasma Physics - High Temperature.
The mission of the CPP-HT Group is
- to develop the theory of burning plasma in the core of a fusion reactor including the effects of fast particles, MHD stability, and the heating and current drive applied for its start-up and control,
- to develop the tools for the integrated modelling of the burning plasma core and its control, and to collaborate with the Computational Plasma Physics - LT (CPP-LT) Group on the grand challenge of integrated tokamak modelling
- to provide theoretical and modelling support to the Tokamak Physics and Plasma Diagnostics Groups in the Fusion Physics Department.