Skip to main content Accessibility help
×
×
Home

Plasma turbulence, suprathermal ion dynamics and code validation on the basic plasma physics device TORPEX

  • I. Furno (a1), F. Avino (a1), A. Bovet (a1), A. Diallo (a2), A. Fasoli, K. Gustafson (a3), D. Iraji (a4), B. Labit (a1), J. Loizu (a2) (a4), S. H. Müller (a1), G. Plyushchev (a1), M. Podestà (a2), F. M. Poli (a2), P. Ricci (a1) and C. Theiler (a1)...

Abstract

The TORPEX basic plasma physics device at the Center for Plasma Physics Research (CRPP) in Lausanne, Switzerland is described. In TORPEX, simple magnetized toroidal configurations, a paradigm for the tokamak scrape-off layer (SOL), as well as more complex magnetic geometries of direct relevance for fusion are produced. Plasmas of different gases are created and sustained by microwaves in the electron-cyclotron (EC) frequency range. Full diagnostic access allows for a complete characterization of plasma fluctuations and wave fields throughout the entire plasma volume, opening new avenues to validate numerical codes. We detail recent advances in the understanding of basic aspects of plasma turbulence, including its development from linearly unstable electrostatic modes, the formation of filamentary structures, or blobs, and its influence on the transport of energy, plasma bulk and suprathermal ions. We present a methodology for the validation of plasma turbulence codes, which focuses on quantitative assessment of the agreement between numerical simulations and TORPEX experimental data.

    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      Plasma turbulence, suprathermal ion dynamics and code validation on the basic plasma physics device TORPEX
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      Plasma turbulence, suprathermal ion dynamics and code validation on the basic plasma physics device TORPEX
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      Plasma turbulence, suprathermal ion dynamics and code validation on the basic plasma physics device TORPEX
      Available formats
      ×

Copyright

Corresponding author

Email address for correspondence: ivo.furno@epfl.ch

References

Hide All
Avino, F., Fasoli, A. and Furno, I. 2014 The new TORPEX in-vessel toroidal conductor for the generation of a poloidal magnetic field. Rev. Sci. Instrum. 85 (3), 2014.
Bovet, A., Furno, I., Fasoli, A., Gustafson, K. and Ricci, P. 2012 Investigation of fast ion transport in TORPEX. Nuclear Fusion 52 (9), 094017.
Bovet, A., Furno, I., Fasoli, A., Gustafson, K. and Ricci, P. 2013 Three-dimensional measurements of non-diffusive fast ion transport in TORPEX. Plasma Phys. Control. Fusion 55 (12), 124021.
Bovet, A., Gamarino, M., Furno, I., Ricci, P., Fasoli, A., Gustafson, K., Newman, D. E. and Sanchez, R. 2014 Transport equation describing fractional Lévy motion of suprathermal ions in TORPEX. Nuclear Fusion 54 (10), 104009.
Diallo, A., Fasoli, A., Furno, I., Labit, B., Podestà, M. and Theiler, C. 2008 Dynamics of plasma blobs in a shear flow. Phys. Rev. Lett. 101, 115005.
Diallo, A., Ricci, P., Fasoli, A., Furno, I., Labit, B., Müller, S. H., Podestà, M., Poli, F. M. and Skiff, F. 2007 Antenna excitation of drift wave in a toroidal plasma. Phys. Plasmas 14 (10), 102101.
D'Ippolito, D. A., Myra, J. R. and Zweben, S. J. 2011 Convective transport by intermittent blob-filaments: comparison of theory and experiment. Phys. Plasmas 18 (6), 060501.
Fasoli, A.et al. 2003 Electrostatic turbulence and transport in a simple magnetized plasma. Bull. Am. Phys. Soc. 13, 119.
Fasoli, A.et al. 2010 Electrostatic instabilities, turbulence and fast ion interactions in the TORPEX device. Plasma Phys. Control. Fusion 52 (12), 124020.
Fasoli, A.et al. 2013 Basic investigations of electrostatic turbulence and its interaction with plasma and suprathermal ions in a simple magnetized toroidal plasma. Nuclear Fusion 53 (6), 063013.
Federspiel, L., Labit, B., Ricci, P., Fasoli, A., Furno, I. and Theiler, C. 2009 Observation of a critical pressure gradient for the stabilization of interchange modes in simple magnetized toroidal plasmas. Phys. Plasmas 16 (9), 092501.
Furno, I., Diallo, A., Fasoli, A., Labit, B., Müller, S. H., Plyushchev, G., Podestà, G. and M., Poli F. 2006 Effect of the magnetic configuration on fluctuations and turbulence in a magnetized toroidal plasma. In: Proc. of 11th EU-US Transport Task Force Meeting, http://www-fusion-magnetique.cea.fr/ttf2006/, Marseille, France.
Furno, I.et al. 2008a Mechanism for blob generation in the TORPEX toroidal plasmaa). Phys. Plasmas 15 (5), 055903.
Furno, I., Spolaore, M., Theiler, C., Vianello, N., Cavazzana, R. and Fasoli, A. 2011a Direct two-dimensional measurements of the field-aligned current associated with plasma blobs. Phys. Rev. Lett. 106, 245001.
Furno, I., Theiler, C., Chabloz, V., Fasoli, A. and Loizu, J. 2014 Pre-sheath density drop induced by ion-neutral friction along plasma blobs and implications for blob velocities. Phys. Plasmas 21 (1), 012305.
Furno, I., Theiler, C., Lançon, D., Fasoli, A., Iraji, D., Ricci, P., Spolaore, M. and Vianello, N. 2011b Blob current structures in TORPEX plasmas: experimental measurements and numerical simulations. Plasma Phys. Control. Fusion 53 (12), 124016.
Furno, I.et al. 2008b Experimental observation of the blob-generation mechanism from interchange waves in a plasma. Phys. Rev. Lett. 100 (5), 055004.
Garcia, O. E. 2012 Stochastic modeling of intermittent scrape-off layer plasma fluctuations. Phys. Rev. Lett. 108, 265001.
Garcia, O. E., Naulin, V., Nielsen, A. H. and R., J. J. 2005 Turbulence and intermittent transport at the boundary of magnetized plasmas. Phys. Plasmas (1994-present) 12 (6), 062309.
Goodman, T. P.et al. 2003 An overview of results from the TCV tokamak. Nuclear Fusion 43 (12), 1619.
Greenwald, M. 2010 Verification and validation for magnetic fusion. Phys. Plasmas 17 (5), 058101.
Gustafson, K. and Ricci, P. 2012 Lévy walk description of suprathermal ion transport. Phys. Plasmas 19 (3), 032304.
Gustafson, K., Ricci, P., Bovet, A., Furno, I. and Fasoli, A. 2012a Suprathermal ion transport in simple magnetized torus configurations. Phys. Plasmas 19 (6), 062306.
Gustafson, K., Ricci, P., Furno, I. and Fasoli, A. 2012b Nondiffusive suprathermal ion transport in simple magnetized toroidal plasmas. Phys. Rev. Lett. 108, 035006.
Guszejnov, D., Lazanyi, N., Bencze, A. and Zoletnik, S. 2013 On the effect of intermittency of turbulence on the parabolic relation between skewness and kurtosis in magnetized plasmas. Phys. Plasmas 20 (11), 112305.
Halpern, F. D., Ricci, P., Jolliet, S., Loizu, J. and Mosetto, A. 2014 Theory of the scrape-off layer width in inner-wall limited tokamak plasmas. Nuclear Fusion 54 (4), 043003.
Halpern, F. D.et al. 2013 Theory-based scaling of the SOL width in circular limited tokamak plasmas. Nuclear Fusion 53 (12), 122001.
Heidbrink, W. W.et al. 2012 Measurements of interactions between waves and energetic ions in basic plasma experiments. Plasma Phys. Control. Fusion 54 (12), 124007.
Henderson, M. A.et al. 2003 Recent results from the electron cyclotron heated plasmas in tokamak à configuration variable (TCV). Phys. Plasmas 10 (5), 17961902.
Iraji, D., Diallo, A., Fasoli, A., Furno, I. and Shibaev, S. 2008 Fast visible imaging of turbulent plasma in TORPEXa). Rev. Sci. Instrum. 79 (10), 10F508.
Iraji, D., Furno, I. and Fasoli, A. 2011 Fast imaging of blob motion in TORPEX plasmas. IEEE Trans. Plasma Sci. 39 (11), 30103011.
Iraji, D.et al. 2010 Imaging of turbulent structures and tomographic reconstruction of TORPEX plasma emissivity. Phys. Plasmas 17 (17), 122304.
Katz, N., Egedal, J., Fox, W., Le, A. and Porkolab, M. 2008 Experiments on the propagation of plasma filaments. Phys. Rev. Lett. 101, 015003.
Krasheninnikov, S. I. 2001 On scrape off layer plasma transport. Phys. Lett. A 283 (5–6), 368–70.
Krommes, J. A. 2008 The remarkable similarity between the scaling of kurtosis with squared skewness for TORPEX density fluctuations and sea-surface temperature fluctuations. Phys. Plasmas 15 (3), 030703.
Labit, B.et al. 2007a Statistical properties of electrostatic turbulence in toroidal magnetized plasmas. Plasma Phys. Control. Fusion 49 (12B), B281.
Labit, B., Furno, I., Fasoli, A., Diallo, A., Müller, S. H., Plyushchev, G., Podestà, M. and Poli, F. M. 2007b Universal statistical properties of drift-interchange turbulence in TORPEX plasmas. Phys. Rev. Lett. 98, 255002.
Labit, B., Theiler, C., Fasoli, A., Furno, I. and Ricci, P. 2011 Blob-induced toroidal momentum transport in simple magnetized plasmas. Phys. Plasmas 18 (3), 032308.
Loizu, J.et al. 2013 On the electrostatic potential in the scrape-off layer of magnetic confinement devices. Plasma Phys. Control. Fusion 55 (12), 124019.
Loizu, J., Ricci, P., Halpern, F. D., Jolliet, S. and Mosetto, A. 2014 Intrinsic toroidal rotation in the scrape-off layer of tokamaks. Phys. Plasmas 21 (6), 062309.
Mekkaoui, A. 2013 Derivation of stochastic differential equations for scrape-off layer plasma fluctuations from experimentally measured statistics. Phys. Plasmas 20 (1), 010701.
Mosetto, A., Halpern, F. D., Jolliet, S., Loizu, J. and Ricci, P. 2013 Turbulent regimes in the tokamak scrape-off layer. Phys. Plasmas 20 (9), 092308.
Müller, S. 2007 Turbulence in basic toroidal plasmas. PhD thesis, SB, Lausanne.
Müller, S. H., Fasoli, A., Labit, B., McGrath, M., Podestà, M. and Poli, F. M. 2004 Effects of a vertical magnetic field on particle confinement in a magnetized plasma torus. Phys. Rev. Lett. 93, 165003.
Müller, S. H., Theiler, C., Fasoli, A., Furno, I., Labit, B., Tynan, G. R., Xu, M., Yan, Z. and Yu, J. H. 2009 Studies of blob formation, propagation and transport mechanisms in basic experimental plasmas (TORPEX and CSDX). Plasma Phys. Control. Fusion 51 (5), 055020.
Müller, S. H.et al. 2006 Probabilistic analysis of turbulent structures from two-dimensional plasma imaging. Phys. Plasmas 13 (10), 100701.
Müller, S. H.et al. 2008 Plasma blobs in a basic toroidal experiment: origin, dynamics, and induced transport. Phys. Plasmas 14, 110704.
Myra, J. R. and D'Ippolito, D. A. 2005 Edge instability regimes with applications to blob transport and the quasicoherent mode. Phys. Plasmas 12 (9), 092511.
Otsuji, K.et al. 2007 Small-scale magnetic-flux emergence observed with hinode solar optical telescope. Publ. Astron. Soc. Japan 59 (sp3), S649S654.
Park, J., Lühr, H., Stolle, C., Rother, M., Min, K. W. and Michaelis, I. 2010 Field-aligned current associated with low-latitude plasma blobs as observed by the champ satellite. Ann. Geophys. 28 (3), 697703.
Perri, S. and Zimbardo, G. 2012 Superdiffusive shock acceleration. Astrophys. J. 750 (2), 87.
Perrone, D.et al. 2013 Nonclassical transport and particle-field coupling: from laboratory plasmas to the solar wind. Space Sci. Rev. 178 (2–4), 233270.
Piras, F.et al. 2009 Snowflake divertor plasmas on TCV. Plasma Phys. Control. Fusion 51 (5), 055009.
Plyushchev, G.et al. 2006 Fast ion source and detector for investigating the interaction of turbulence with suprathermal ions in a low temperature toroidal plasma. Rev. Sci. Instrum. 77 (10), 10F503.
Podestà, M. 2007 Plasma production and transport in a simple magnetised toroidal plasma. PhD thesis, SB, Lausanne.
Podestà, M., Diallo, A., Fasoli, A., Furno, I., Labit, B., Müller, S. H. and Poli, F. M. 2007 Characterization of the electron distribution function in an electron-cyclotron driven toroidal plasma. Plasma Phys. Control. Fusion 49 (2), 175.
Podestà, M., Fasoli, A., Labit, B., Furno, I., Ricci, P., Poli, F. M., Diallo, A., Müller, S. H. and Theiler, C. 2008 Cross-field transport by instabilities and blobs in a magnetized toroidal plasma. Phys. Rev. Lett. 101, 045001.
Podestà, M., Fasoli, A., Labit, B., McGrath, M., Müller, S. H. and Poli, F. M. 2006 Experimental characterization and modelling of the particle source in an electron-cyclotron wave driven toroidal plasma. Plasma Phys. Control. Fusion 48 (8), 1053.
Podestà, M.et al. 2005 Plasma production by low-field side injection of electron cyclotron waves in a simple magnetized torus. Plasma Phys. Control. Fusion 47 (11), 19892002.
Poli, F. M., Brunner, S., Diallo, A., Fasoli, A., Furno, I., Labit, B., Müller, S. H., Plyushchev, G. and Podestà, M. 2006 Experimental characterization of drift-interchange instabilities in a simple toroidal plasma. Phys. Plasmas 13 (10), 102104.
Poli, F. M., Podestà, M. and Fasoli, A. 2007 Development of electrostatic turbulence from drift-interchange instabilities in a toroidal plasma. Phys. Plasmas 14 (5), 052311.
Poli, F. M., Ricci, P., Fasoli, A. and Podestà, M. 2008 Transition from drift to interchange instabilities in an open magnetic field line configuration. Phys. Plasmas 15 (3), 032104.
Reames, D. V. 1999 Particle acceleration at the Sun and in the heliosphere. Space Sci. Rev. 90 (3–4), 413491.
Ricci, P., Halpern, F. D., Jolliet, S., Loizu, J., Mosetto, A., Fasoli, A., Furno, I. and Theiler, C. 2012 Simulation of plasma turbulence in scrape-off layer conditions: the gbs code, simulation results and code validation. Plasma Phys. Control. Fusion 54 (12), 124047.
Ricci, P. and Rogers, B. N. 2009 Three-dimensional fluid simulations of a simple magnetized toroidal plasma. Phys. Plasmas 16 (9), 092307.
Ricci, P. and Rogers, B. N. 2010 Turbulence phase space in simple magnetized toroidal plasmas. Phys. Rev. Lett. 104, 145001.
Ricci, P. and Rogers, B. N. 2013 Plasma turbulence in the scrape-off layer of tokamak devices. Phys. Plasmas 20 (1), 010702.
Ricci, P., Rogers, B. N. and Brunner, S. 2008 High- and low-confinement modes in simple magnetized toroidal plasmas. Phys. Rev. Lett. 100, 225002.
Ricci, P., Theiler, C., Fasoli, A., Furno, I., Gustafson, K., Iraji, D. and Loizu, J. 2011 Methodology for turbulence code validation: quantification of simulation-experiment agreement and application to the TORPEX experiment. Phys. Plasmas 18 (3), 032109.
Ricci, P., Theiler, C., Fasoli, A., Furno, I., Labit, B., Müller, S. H., Podestà, M. and Poli, F. M. 2009 Langmuir probe-based observables for plasma-turbulence code validation and application to the TORPEX basic plasma physics experiments. Phys. Plasmas 16 (5), 055703.
Riva, F., Ricci, P., Halpern, F. D., Jolliet, S., Loizu, J. and Mosetto, A. 2014 Verification methodology for plasma simulations and application to a scrape-off layer turbulence code. Phys. Plasmas 21 (6), 062301.
Ryutov, D. D. 2007 Geometrical properties of a snowflake divertor. Phys. Plasmas 14 (6), 064502.
Sandberg, I., Benkadda, S., Garbet, X., Ropokis, G., Hizanidis, K. and del-Castillo-Negrete, D. 2012 Universal probability distribution function for bursty transport in plasma turbulence. Phys. Rev. Lett. 103, 165001.
Schaffner, D. A., Carter, T. A., Rossi, G. D., Guice, D. S., Maggs, J. E., Vincena, S. and Friedman, B. 2012 Modification of turbulent transport with continuous variation of flow shear in the large plasma device. Phys. Rev. Lett. 109, 135002.
Terry, P. W.et al. 2008 Validation in fusion research: towards guidelines and best practices. Phys. Plasmas 15 (6), 62503.
Theiler, C., Diallo, A., Fasoli, A., Furno, I., Labit, B., Podestà, M., Poli, F. M. and Ricci, P. 2008 The role of the density gradient on intermittent cross-field transport events in a simple magnetized toroidal plasma. Phys. Plasmas 15 (4), 042303.
Theiler, C., Furno, I., Fasoli, A., Ricci, P., Labit, B. and Iraji, D. 2011a Blob motion and control in simple magnetized plasmasa. Phys. Plasmas 18 (5), 055901.
Theiler, C., Furno, I., Kuenlin, A., Marmillod, Ph. and Fasoli, A. 2011b Practical solutions for reliable triple probe measurements in magnetized plasmas. Rev. Sci. Instrum. 82 (1), 013504.
Theiler, C., Furno, I., Loizu, J. and Fasoli, A. 2012a Convective cells and blob control in a simple magnetized plasma. Phys. Rev. Lett. 108, 065005.
Theiler, C., Loizu, J., Furno, I., Fasoli, A. and Ricci, P. 2012b Properties of convective cells generated in magnetized toroidal plasmas. Phys. Plasmas 19 (8), 082304.
Theiler, C.et al. 2009 Cross-field motion of plasma blobs in an open magnetic field line configuration. Phys. Rev. Lett. 103 (6), 065001.
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Journal of Plasma Physics
  • ISSN: 0022-3778
  • EISSN: 1469-7807
  • URL: /core/journals/journal-of-plasma-physics
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×
MathJax

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed