Allah Rakha – Fusion Group

Oral talk at the leading European Fusion Theory Conference

October 23, 2019

In the second week of October, our group member Dr. Allah Rakha participated in the 18^th European Fusion Theory Conference (EFTC), which is one of the world leading fusion theory conferences, and delivered an oral talk titled ‘Shear Alfvén wave continuum spectrum with bifurcated helical core equilibria’.

In his discourse, he presented the modelling results of Alfvén continuum calculations due to helical core equilibria in the ASDEX Upgrade tokamak plasmas, which he had obtained using stellarator community 3D numerical tools. This year, the conference took place at Ghent University, Belgium on October 7-10, 2019.

Our recent Nuclear Fusion journal paper on the modelling of ASDEX Upgrade tokamak plasmas

September 12, 2019September 24, 2020

View from the ASDEX Upgrade Control Room.

Our journal article entitled “Shear Alfvén wave continuum spectrum with bifurcated helical core equilibria” has been published in the peer-reviewed Nuclear Fusion journal. Jointly published by IAEA and IOP Publishing, Nuclear Fusion is one of the renowned journals specializing in fusion plasmas.

The paper reports on the first modelling results aimed at understanding low-frequency Alfvén eigenmodes called beta induced Alfvén eigenmodes (BAEs) observed during monster sawtooth crashes in ASDEX Upgrade tokamak plasmas and their comparison with the experimental observations.

Research stay at Max-Planck Institute for Plasma Physics (IPP), Garching, Germany

February 28, 2019February 28, 2019

Our PhD student Allah Rakha is back at BSC after successfully completing a six-month research stay at the Max-Planck Institute for Plasma Physics (IPP), Germany. IPP is a leading institute in Europe for both theoretical and experimental studies of fusion plasmas, equipped with two state-of-the-art fusion experimental devices, the ASDEX Upgrade (AUG) tokamak and the world’s largest stellarator Wendelstein 7-X.

Our new journal paper in Nuclear Fusion

January 25, 2019September 24, 2020

TJ-II stellarator at the Laboratorio Nacional de Fusión (LNF), CIEMAT, Madrid, Spain (Foto: http://www.fusion.ciemat.es)

Our journal article entitled “Modelling of beam-driven Alfvén modes in TJ-II plasmas” has been accepted for publication in Nuclear Fusion. Nuclear Fusion is one of the renowned journals in our field.

The paper reports on our modelling results aimed at understanding a certain type of energetic-particle-driven instabilities called Alfvén modes in TJ-II stellarator plasmas and their comparisons with experimental results. In particular, we have modelled Alfvén eigenmodes in TJ-II discharges with a dynamically changing magnetic configuration when both steady and chirping modes are observed. The modelled mode frequencies and radial locations are found to be consistent with the experimental findings. We also have drawn important conclusions on the properties of the energetic particles that are resonant with the modes.

The journal article can be found via this link.

Presentation of our research results at 45th EPS Conference on Plasma Physics

July 13, 2018July 13, 2018

The 45th European Physical Society Conference on Plasma Physics took place in Prague, Czech Republic, from the 2nd to the 6th of July, 2018. It is the largest annual conference in the field organized in Europe. This year the conference attracted a record number of more than 850 registered participants throughout the world. Our group leader Prof. Mervi Mantsinen chaired the magnetic confinement fusion plasma section of the Program Committee.

Presentation on TJ-II Alfvénic instabilities at Fast Ions Physics workshop

April 20, 2018April 21, 2018

IPP Greifswald, Germany. Photo: heinze.de

Our PhD student Allah Rakha presented his current work titled “Modelling of Energetic Particle-Driven Alfvénic instabilities in TJ-II plasmas” at Fast Ions Physics workshop (January 22-23, 2018), held at Max-Planck-Institut für Plasmaphysik Teilinstitut Greifswald, Germany.

The fast ion physics workshop was designed for the stellarator fusion community to envisage the studies of energetic particles for up-coming experimental campaign in July 218 at W7X stellarator.