Browsing by Author "Mantsinen, Mervi"

Now showing items 1-20 of 24

    • A new ion cyclotron range of frequency scenario for bulk ion heating in deuterium-tritium plasmas: How to utilize intrinsic impurities in our favour 

      Kazakov, Ye O.; Ongena, Jozef; Van Eester, Dirk; Bilato, Roberto; Dumont, Rémi J.; Lerche, Ernesto A.; Mantsinen, Mervi; Messiaen, André M. (American Institute of Physics Publising LLC, 2015-08-24)
      Article
      Open Access
      A fusion reactor requires plasma pre-heating before the rate of deuterium-tritium fusion reactions becomes significant. In ITER, radiofrequency (RF) heating of He ions, additionally puffed into the plasma, is one of the ...

    • Active control of Alfvén eigenmodes inmagnetically confined toroidal plasmas 

      Garcia Muñoz, Manuel; Shaparov, Sergei; Zeeland, Michael A, Van; Ascasibar, Enrique; Cappa, Álvaro; Chen, L; Ferreira, J; Galdon Quiroga, Joaquin; Geiger, Benedikt; González Martin, J; Heidbrink, William W.; Johnson, T; Lauber, Phillipp; Mantsinen, Mervi; Melkinov, Alexander; Nabais, F; Rivero Rodríguez, Juan Francisco; Sanchis Sanchez, Lucía; Schneider, P; Stober, Jörg; Suttrop, Wolfgang; Todo, Yasushi; Vallejos, Pablo; Zonca, Fulvio; AUG and MST1 Teams (IOP Publishing, 2019-03)
      Article
      Open Access
      Alfvén waves are electromagnetic perturbations inherent to magnetized plasmas that can be driven unstable by a free energy associated with gradients in the energetic particles' distribution function. The energetic particles ...

    • Analysis of the potential of ICRF waves to heat bulk ions in DEMO 

      Gallart, Daniel; Mantsinen, Mervi; Kazakov, Yevgen (European Physical Society (EPS), 2015)
      Conference report
      Open Access
      While ITER’s main purpose is to confirm the feasibility of nuclear fusion as an energy source, DEMO is planned as the first fusion reactor to produce net electrical energy. Our analysis is carried out for the DEMO 2015 ...

    • Application of the VUV and the soft x-ray systems on JET for the study of intrinsic impurity behavior in neon seeded hybrid discharges 

      Krawczyk, N.; Czarnecka, A.; Ivanova-Stanik, I.; Zagórski, R.; Challis, C.; Frigione, D.; Giroud, C.; Graves, J.; Mantsinen, Mervi; Silburn, S.; JET Contributors (AIP Publishing, 2018-10-24)
      Article
      Open Access
      This paper reports on impurity behavior in a set of hybrid discharges with Ne seeding—one of the techniques considered to reduce the power load on reactor walls. A series of experiments carried out with light gas injection ...

    • Bulk ion heating with ICRF waves in tokamaks 

      Mantsinen, Mervi; Bilato, Roberto; Bobkov, Volodymyr; Kappatou, Athina; McDermott, Rachel; Nocente, Massimo; Odstrcil, Tomas; Tardini, Giovanni; Bernert, Matthias; Dux, Ralph; Hellsten, Torbjörn; Mantica, Paola; Maraschek, Marc; Nielsen, Stefan K.; Noterdaeme, Jean-Marie; Rasmussen, Jens; Ryter, François; Stejner, Morten; Stober, Jörg; Tardocchi, Marco; The ASDEX Upgrade Team and the EUROfusion MST1 Team (AIP, 2015-12-12)
      Conference report
      Open Access
      Heating with ICRF waves is a well-established method on present-day tokamaks and one of the heating systems foreseen for ITER. However, further work is still needed to test and optimize its performance in fusion devices ...

    • Challenges in the extrapolation from DD to DT plasmas: experimental analysis and theory based predictions for JET-DT 

      Garcia, J.; Challis, C.; Gallart, D.; Garzotti, L.; Görler, T.; King, D.; Mantsinen, Mervi; Jet Contributors (IOP Publishing, 2016-10-27)
      Article
      Open Access
      A strong modelling program has been started in support of the future JET-DT campaign with the aim of guiding experiments in deuterium (D) towards maximizing fusion energy production in Deuterium–Tritium (DT). Some of the ...

    • Development of HPC multiphysics framework for HTS magnets in fusion 

      Lorenzo, José; Castillo-Reyes, Octavio; Granados García, Javier A.J.; Mantsinen, Mervi; Sáez, Xavier; Soba, Alejandro (Barcelona Supercomputing Center, 2019-05-07)
      Conference report
      Open Access

    • Dual sightline measurements of MeV range deuterons with neutron and gamma-ray spectroscopy at JET 

      Eriksson, Johan; Scopus - Author details - Nocente, Massimo; Binda, Federico; Scopus - Author details - Cazzaniga, Carlo; Conroy, Sean W.; Ericsson, Göran N.; Giacomelli, Luca C.; Gorini, Giuseppe; Hellesen, Carl; Hellsten, Törbjrn; Hjalmarsson, Anders; Jacobsen, Arnhild S.; Johnson, Thomas; Kiptily, Vasily; Koskela, Tuomas; Mantsinen, Mervi; Salewski, Mirko; Schneider, Michael; Sharapov, Sergei; Skiba, Mateusz; Tardocchi, Marco; Weiszflog, Matthias (Institute of Physics Publishing (IOP), 2015-11-19)
      Article
      Open Access
      Observations made in a JET experiment aimed at accelerating deuterons to the MeV range by third harmonic radio-frequency (RF) heating coupled into a deuterium beam are reported. Measurements are based on a set of advanced ...

    • First experience with particle-in-cell plasma physics code on ARM-based HPC systems 

      Sáez, Xavier; Soba, Alejandro; Sánchez, Edilberto; Mantsinen, Mervi; Mateo, Sergio; Cela, José M.; Castejón, Francisco (IOP Publishing, 2015-09-28)
      Article
      Open Access
      In this work, we will explore the feasibility of porting a Particle-in-cell code (EUTERPE) to an ARM multi-core platform from the Mont-Blanc project. The used prototype is based on a system-on-chip Samsung Exynos 5 with ...

    • Fusion product losses due to fishbone instabilities in deuterium JET plasmas 

      Kiptily, V.G.; Fitzgerald, M.; Goloborodko, V.; Sharapov, S.E.; Challis, C.D.; Frigione, D.; Graves, J.; Mantsinen, Mervi; Beaumont, P.; Garcia-Munoz, M.; Perez von Thun, C.; Rodriguez, J.F.R.; Darrow, D.; Keeling, D.; King, D.; McClements, K.G.; Solano, E.R.; Schmuck, S.; Sips, G.; Szepesi, G.; JET Contributors (IOP Publishing, 2018)
      Article
      Open Access
      During development of a high-performance hybrid scenario for future deuterium–tritium experiments on the Joint European Torus, an increased level of fast ion losses in the MeV energy range was observed during the instability ...

    • Heating bulk ions in DEMO with ICRF waves 

      Gallart, Dani; Mantsinen, Mervi; Kazakov, Yevgen (Barcelona Supercomputing Center, 2015-05-05)
      Conference report
      Open Access
      Ion cyclotron resonance frequency heating (ICRF) is one of the auxiliary heating schemes presently envisaged for ITER and DEMO. In this paper we analyse the potential of ICRF waves to heat the fuel ions in DEMO. Our ...

    • ICRH analysis of high-performance JET hybrid discharges using PION modelling and neutron spectrometry measurements 

      Mantsinen, Mervi; Eriksson, Jacob; Challis, Clive; Frigione, Domenico; García, Jerónimo; Giroud, Carine; Hjalmarsson, Ake; Damian, King (European Physical Society (EPS), 2015)
      Conference report
      Open Access
      The hybrid scenario is an operational tokamak plasma regime designed to achieve long pulse operat ion with a combination of inductive and non-inductive current drive. It has been suggested for ...

    • ICRH physics and technology achievements in JET-ILW 

      Jacquet, P.; van Eester, D.; Lerche, E.; Bobkov, V.; Blackman, T.; Colas, L.; Challis, C.; Czarnecka, A.; Dumortier, P.; Frigione, D.; Durodié, F.; Garzotti, L.; Goniche, M.; Graves, J.; Kazakov, Y.; Kirov, K.; Klepper, C.C.; Krawczyk, N.; Krivska, A.; Mantsinen, Mervi; Monakhov, I.; Nunes, I.; Ongena, J.; Reinke, M.; Rimini, F.; Zhang, W.; JET Contributors (EDP Sciences, 2017-10-23)
      Article
      Open Access
      ICRH was extensively used in the 2015-16 JET-ILW (ITER like wall) experimental campaign; bulk heating together with high-Z impurity chase-out from plasma centre importantly contributed to the good DD fusion performance ...

    • Modelling of combined ICRF and NBI heating in JET hybrid plasmas 

      Gallart, Dani; Mantsinen, Mervi; Challis, Clive; Frigione, Domenico; Graves, Jonathan; Hobirk, Joerg; Belonohy, Eva; Czarnecka, Agata; Eriksson, Jacob; Goniche, Marc; Hellesen, Carl; Jacquet, Philippe; Joffrin, Emmanuel; Krawczyk, Natalia; King, Damian; Lennholm, Morten; Lerche, Ernesto; Pawelec, Ewa; Sips, George; Solano, Emilia; Tsalas, Maximos; Valisa, Marco; JET Contributors (EDP Sciences, 2017-10-23)
      Article
      Open Access
      During the 2015-2016 JET campaigns many efforts have been devoted to the exploration of high performance plasma scenarios envisaged for ITER operation. In this paper we model the combined ICRF+NBI heating in selected key ...

    • Modelling of ICRF heating in DEMO with special emphasis on bulk ion heating 

      Gallart, Daniel; Mantsinen, Mervi; Kazakov, Yevgen (AIP, 2015-12-10)
      Conference report
      Open Access
      Ion cyclotron resonance frequency (ICRF) heating is one of the auxiliary heating schemes presently envisaged for ITER and DEMO. In this paper we analyse the potential of ICRF waves to heat the fuel ions in DEMO. Our analysis ...

    • Non-linear MHD Simulation s of Pellet Triggered ELMs in JET and ASDEX Upgrade tokamaks 

      Futatani, Shimpei; Pamela, S.; Huijsmans, G.T.A.; Garzotti, L.; Frigione, D.; Loarte, D.; Hoelzl, M.; Lang, P.T.; Kocsis, G.; Orain, F.; Dunne, M.; Lessig, A.; Mantsinen, Mervi; EUROfusion MST1 Team; ASDEX Upgrade Team; JET Contributors (2016-07-08)
      Open Access
      ITER operation in its high fusion performance DT scenarios relies on the achievement of the H-mode confinement regime, which is expected to lead to the quasi-periodic triggering of ELMs (Edge Localized Modes). ...

    • Observations and modelling of ion cyclotron emission observed in JET plasmas using a sub-harmonic arc detection system during ion cyclotron resonance heating 

      McClements, K.G.; Brisset, A.; Chapman, B.; Dendy, R.O.; Jacquet, P.; Kiptily, V.G.; Mantsinen, Mervi; Reman, B.C.G.; JET Contributors (IOP Publishing:, 2018-07-10)
      Article
      Open Access
      Measurements are reported of electromagnetic emission close to the cyclotron frequency of energetic ions in JET plasmas heated by waves in the ion cylotron range of frequencies (ICRF). Hydrogen was the majority ion species ...

    • Overview of ASDEX Upgrade results 

      ASDEX Upgrade Team; EUROfusion MST1 Team; Mantsinen, Mervi (International Atomic Energy Agency (IAEA), 2017-06-28)
      Article
      Open Access
      The ASDEX Upgrade (AUG) programme is directed towards physics input to critical elements of the ITER design and the preparation of ITER operation, as well as addressing physics issues for a future DEMO design. Since 2015, ...

    • Plasma physics code contribution to the Mont-Blanc project 

      Sáez, Xavier; Soba, Alejandro; Mantsinen, Mervi (Barcelona Supercomputing Center, 2015-05-05)
      Conference report
      Open Access
      This work develops strategies for adapting a particle-in-cell code to heterogeneous computer architectures and, in particular, to an ARM-based prototype of the Mont-Blanc project using OmpSs programming model and the ...

    • Simulations of combined ICRF and NBI heating for high fusion performance in JET 

      Gallart, Daniel; Mantsinen, Mervi; Garzotti, Luca; Bilato, Roberto; Challis, Clive; Garcia, Jerónimo; Gutierrez-Milla, Albert; Johnson, Thomas; Lerche, Ernesto; Sáez, Xavier; van Eester, Dirk (2016-07-08)
      Conference lecture
      Open Access
      We report on simulations aimed at optimizing external heating using neutral beam injection (NBI) and radiofrequency waves in the ion cyclotron range of frequencies (ICRF) for high fusion yield in the JET tokamak. In this ...