Publication
A phenomenological explanation for the anomalous ion heating observed in the JET alpha-heating experiment of 1997
Publications associées (69)
Long plasma duration operation analyses with an international multi-machine (tokamaks and stellarators) database
Combined high-fusion performance and long-pulse operation is one of the key integration challenges for fusion energy development in magnetic devices. Addressing these challenges requires an integrated vision of physics and engineering aspects with the purp ...
Bristol2024Global fluid simulations of plasma turbulence in stellarators
António João Caeiro Heitor Coelho
In order to cope with the decarbonization challenge faced by many countries, fusion is one of the few alternatives to fossil fuels for the production of electricity. Two devices invented in the middle of the previous century have emerged as the most promis ...
EPFL2024Beam homogeneity of caesium seeded SPIDER using a direct beamlet current measurement
The ITER Heating Neutral Beam (HNB) source prototype SPIDER (Source for the Production of Ions of Deuterium Extracted from a Radio frequency plasma), hosted at the Neutral Beam Test Facility (NBTF) in Padova, Italy, has recently started operating with evap ...
ELSEVIER SCIENCE SA2023First characterization of the SPIDER beam AC component with the Beamlet Current Monitor
SPIDER is the full scale prototype for the ITER Heating Neutral Beam source, hosted at the Neutral Beam Test Facility in Padova, Italy. The behavior of the beam must be thoroughly investigated to bring the machine's performance in line with ITER's requirem ...
ELSEVIER SCIENCE SA2023ICRH assisted breakdown study on JET
Benoît Labit, Haomin Sun, Thomas Binderup Jensen
Ion cyclotron (IC) wave assisted breakdown has the potential to increase the robustness of plasma initiation during the ITER pre-fusion operation phase. Studies were performed at JET at ITER relevant loop electric field, E-loop ? 0.33 Vm(-1), and a range o ...
IOP Publishing Ltd2023Physics of runaway electrons with shattered pellet injection at JET
Cristian Sommariva, Javier García Hernández, Gergely Papp
Runaway electrons (REs) created during tokamak disruptions pose a threat to the reliable operation of future larger machines. Experiments using shattered pellet injection (SPI) have been carried out at the JET tokamak to investigate ways to prevent their g ...
IOP Publishing Ltd2022Study of Negative Ion Beamlets Produced in SPIDER by Beam Emission Spectroscopy
Among the beam diagnostics routinely employed in source for production of ion of deuterium (SPIDER), beam emission spectroscopy (BES) provides valuable information for beam characterization, thus driving source optimization methods. In particular, this tec ...
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2022Physics and applications of three-ion ICRF scenarios for fusion research
Henri Weisen, Javier García Hernández, Mikhail Maslov, Samuele Mazzi
This paper summarizes the physical principles behind the novel three-ion scenarios using radio frequency waves in the ion cyclotron range of frequencies (ICRF). We discuss how to transform mode conversion electron heating into a new flexible ICRF technique ...
AMER INST PHYSICS2021Performance of a high vacuum, high temperature compatible millimeter-range viewing dump for the vertical ECE experiment on TCV
A high vacuum and high temperature compatible viewing dump, made of MACOR, was designed and installed in TCV for Vertical ECE experiments in the 75-110 GHz frequency range. Measurements of the dump prior to installation in the tokamak showed in more than 9 ...
2021Generation and observation of fast deuterium ions and fusion-born alpha particles in JET D-He-3 plasmas with the 3-ion radio-frequency heating scenario
Henri Weisen, Javier García Hernández, Alberto Mariani, Samuele Mazzi
Dedicated experiments to generate energetic D ions and D-(3) He fusion-born alpha particles were performed at the Joint European Torus (JET) with the ITER-like wall (ILW). Using the 3-ion D-(D-NBI)-(3) He radio frequency (RF) heating scenario, deuterium io ...
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