Plasma Conditions in JET Unseeded L-Mode Plasmas
Explore the scrape-off layer regimes and plasma conditions in JET unseeded L-mode plasmas as discussed during the EIRENE-Yacora meeting. Find out how attached and detached plasma conditions were achieved in the outer divertor, along with methods of measuring plasma parameters like electron temperature and edge density.
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Scrape-off layer regimes / plasmas conditions in JET unseeded L-mode plasmas EIRENE-Yacora meeting May 3, 2022 Adapted from M. Groth - IAEA TM CRM W and H Mar 29, 2021 Mathias Groth, Vladimir Solokha, Spyros Aleiferis, Beth Thomas, Bartosz Lomanowski, Andy Meigs Full author list at the end
Attached and detached plasma conditions were achieved in the outer divertor: Te,OSP50 2 eV (LPs) Idiv, OT <ne>edge H , D , T Te, ne Two methods of measuring Te and ne: - > 20 eV: LPs - < 20 eV: high-res. spectroscopy Idiv, jsat, Te, ne Mathias Groth | IAEA-TM CR Properties W & H | Vienna, Austria | March 29, 2021 | Page 2
Attached and detached plasma conditions were achieved in the outer divertor: Te,OSP50 2 eV (LPs) Idiv, OT Te, OT ne, OT <ne>edge [m-3] <ne>edge [m-3] Mathias Groth | IAEA-TM CR Properties W & H | Vienna, Austria | March 29, 2021 | Page 3
Attached and detached plasma conditions were achieved in the outer divertor: Te,OSP50 2 eV (LPs) Idiv, OT Te, OT ne, OT <ne>edge [m-3] jsurf,pk Te,pk [eV] ne,pk [1022 #/s/m2] [1020 m3] Low-recyc. 5 30-40 0.2-0.5 High-recyc. 50 2-3 2 Detached < 2 0.5 -1.0 6-8 <ne>edge [m-3] Mathias Groth | IAEA-TM CR Properties W & H | Vienna, Austria | March 29, 2021 | Page 4
Acknowledgements M. Groth1, A. Holm1,, N. Horsten1, A. J rvinen1, P. Heliste1, J. Karhunen1,2, H. Kumpulainen1, B. Lomanowski1,3, V. Solokha1 P. Boerner4, D. Borodin4, S. Brezinsek4, D. Harting4, A. Huber4, D. Reiter4,5, G. Sergienko4, S. Wiesen4 S. Aleiferis6, M. Brix7, I. Carvalho8, P. Carvalho8, I. Coffey7, G. Corrigan7, E. de la Luna9, J. Flanagan7, C. Giroud7, K. Kirov7, K.D. Lawson7, C. Lowry7, C.F. Maggi7, A.G. Meigs7, S. Menmuir7, E. Pawelec10, T. Pereira8, A. Shaw7, S. Silburn7, B. Thomas7, B. Viola11 P. Belo8, M.N.A. Beurskens7, M. Clever4, J.W. Coenen4, S. Devaux12, T. Eich12, S. Marsen13, P. Drewelow13,C. Guillemaut14, S. Jachmich15, M. Lehnen4, B. Sieglin12, C. Silva8, A. Sirinelli7, M.F. Stamp7, G.J. van Rooij16 and JET-EFDA and JET Contributors* EFDA-JET, Culham Science Centre, Abingdon, OX14 3DB, UK EUROfusion Consortium, JET, Culham Science Centre, Abingdon, OX14 3DB, UK * See Appendices of F. Romanelli, Proc. 24th IAEA-FEC, San Diego, USA, F. Romanelli, Proc. 25th IAEA-FEC, St. Petersburg, Russia, X. Litaudon, Proc. 25th IAEA-FEC, Kyoto, Japan, and E. Joffrin et al., Proc. of the 27th IAEA-FEC 2018, Gandhinagar, India Mathias Groth | IAEA-TM CR Properties W & H | Vienna, Austria | March 29, 2021 | Page 5
Affiliations 1Aalto University, Espoo, Finland 2University of Helsinki, Helsinki, Finland 3Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA 4Forschungszentrum J lich GmbH, Institute for Energy and Climate Research Plasma Physics, J lich, Germany 5Heinrich Heine University D sseldorf, D sseldorf, Germany 6NCSR Demokritos Institute of Nuclear and Particle Physics, Athens, Greece 7Culham Centre for Fusion Energy, Culham Science Centre, Abingdon, UK 8Institute of Plasmas and Nuclear Fusion, Lisbon, Portugal 9Laboratorio Nacional de Fusi n, CIEMAT, Madrid, Spain 10University of Opole, Opole, Poland 11ENEA, Frascati, Italy 12Max-Planck-Institute for Plasma Physics, Garching, Germany 13Max-Planck-Institute for Plasma Physics, Greifswald, Germany 14IRFM, CEA Cadarache, St. Paul-lez-Durance, France 15Ecole Royale Militaire, Brussels, Belgium 15DIFFER, Nieuwegein, The Netherlands Mathias Groth | IAEA-TM CR Properties W & H | Vienna, Austria | March 29, 2021 | Page 6
