Person

Konstantinos Avramidis

Related publications (35)

Towards Advanced Fusion Gyrotrons: 2018 Update on Activities within EUROfusion

Stefano Alberti, Minh Quang Tran, Ioannis Pagonakis, Martin Schmid, Konstantinos Avramidis

During the ongoing pre-concept phase (2014 - 2020) for a possible future European DEMOnstration Fusion Power Plant (DEMO) the activities within EUROfusion WP HCD EC Gyrotron R&D and Advanced Developments are focusing on options for near-term solutions, and ...

E D P SCIENCES2019

THALES TH1507 140 GHz 1 MW CW Gyrotron for W7-X Stellarator

Stefano Alberti, Jean-Philippe Hogge, Ioannis Pagonakis, Konstantinos Avramidis

The status of the THALES 140 GHz 1 MW CW industrial gyrotron program for the W7-X stellarator is discussed in this paper. The industrial design and performances arc briefly discussed with a focus on the tube reliability and endurance. ...

IEEE2019

DEMO-Relevant Gyrotron Research at KIT

Minh Quang Tran, Ioannis Pagonakis, Konstantinos Avramidis

The DEMO-relevant gyrotron research at Karlsruhe Institute of Technology is driven by the European concept for a demonstration fusion reactor (EU DEMO). This paper reports on the recent results of the theoretical and experimental studies towards the develo ...

IEEE2019

Overview of Recent Gyrotron R&D at KIT in View of the EU DEMO

Minh Quang Tran, Ioannis Pagonakis, Konstantinos Avramidis

A large part of the gyrotron R&D activities at Karlsruhe Institute of Technology focus on addressing challenging requirements posed on gyrotrons by the European concept for a demonstration fusion power plant (EU DEMO). This paper reports on the progress of ...

IEEE2018

Parasitic Oscillations in Smooth-Wall Circular Symmetric Gyrotron Beam Ducts

Stefano Alberti, Minh Quang Tran, Jean-Philippe Hogge, Jérémy Genoud, Trach-Minh Tran, Konstantinos Avramidis

In order to study parasitic oscillation that may occur in a realistic beam duct upstream to the gyrotron cavity, the self-consistent linear and spectral code TWANGlinspec has been modified. The large inhomogeneities in the smooth-wall beam duct geometry or ...

2018

EU DEMO EC system preliminary conceptual design

Stefano Alberti, Minh Quang Tran, Ioannis Pagonakis, Emanuele Poli, Konstantinos Avramidis

The engineering design and R&D of auxiliary heating systems and their sub-systems are a key activities in the frame of the present conceptual design phase for a first of a kind DEMOnstration Fusion Power Plant in order to develop a system capable of achiev ...

ELSEVIER SCIENCE SA2018

Conceptual design of the EU DEMO EC-system: main developments and R&D achievements

Stefano Alberti, Minh Quang Tran, Falk Hans Braunmüller, Ioannis Pagonakis, Emanuele Poli, Konstantinos Avramidis

For the development of a DEMOnstration Fusion Power Plant the design of auxiliary heating systems is a key activity in order to achieve controlled burning plasma. The present heating mix considers electron cyclotron resonance heating (ECRH), neutral beam i ...

Iop Publishing Ltd2017

CW Experiments With the EU 1-MW, 170-GHz Industrial Prototype Gyrotron for ITER at KIT

Stefano Alberti, Minh Quang Tran, Jean-Philippe Hogge, Christian Schlatter, Ioannis Pagonakis, Martin Schmid, Konstantinos Avramidis

The European 1-MW, 170-GHz continuous wave industrial prototype gyrotron for electron cyclotron resonance heating and current drive on international thermonuclear experimental reactor was during 2016 under test at the Karlsruhe Institute of Technology (KIT ...

Institute of Electrical and Electronics Engineers2017

Electron trapping mechanisms in magnetron injection guns

Jean-Philippe Hogge, Ioannis Pagonakis, Jiahuan Zhang, Konstantinos Avramidis

A key parameter for the gyrotron operation and efficiency is the presence of trapped electrons. Two electron trapping mechanisms can take place in gyrotrons: (i) the adiabatic trap and (ii) the magnetic potential well. Their influence on the gyrotron opera ...

AIP2016

Progress on the upgrade of the TCV EC-system with two 1MW dual-frequency gyrotrons

Timothy Goodman, Stefano Alberti, Minh Quang Tran, Jean-Philippe Hogge, Jérémy Genoud, Trach-Minh Tran, Ioannis Pagonakis, Konstantinos Avramidis

The upgrade of the electron cyclotron (EC) system of the TCV tokamak has entered in its realization phase. The MW-class dual-frequency gyrotron design (84 or 126GHz/2s), based on the 140GHz W7-X gyrotron, is finalized and a contract for the manufacturing o ...

IEEE2016

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