Overview of diagnostic performance and results for the first operation phase in Wendelstein 7-X (invited)

M. Krychowiak; A. Adnan; A. Alonso; T. Andreeva; J. Baldzuhn; T. Barbui; M. Beurskens; W. Biel; C. Biedermann; B. D. Blackwell; H. S. Bosch; S. Bozhenkov; R. Brakel; T. Bräuer; B. Brotas De Carvalho; R. Burhenn; B. Buttenschön; A. Cappa; G. Cseh; A. Czarnecka; A. Dinklage; P. Drews; A. Dzikowicka; F. Effenberg; M. Endler; V. Erckmann; T. Estrada; O. Ford; T. Fornal; H. Frerichs; G. Fuchert; J. Geiger; O. Grulke; J. H. Harris; H. J. Hartfuß; D. Hartmann; D. Hathiramani; M. Hirsch; U. Höfel; S. Jabłoński; M. W. Jakubowski; J. Kaczmarczyk; T. Klinger; S. Klose; J. Knauer; G. Kocsis; R. König; P. Kornejew; A. Krämer-Flecken; N. Krawczyk; T. Kremeyer; I. Ksiazek; M. Kubkowska; A. Langenberg; H. P. Laqua; M. Laux; S. Lazerson; Y. Liang; S. C. Liu; A. Lorenz; A. O. Marchuk; S. Marsen; V. Moncada; D. Naujoks; H. Neilson; O. Neubauer; U. Neuner; H. Niemann; J. W. Oosterbeek; M. Otte; N. Pablant; E. Pasch; T. Sunn Pedersen; F. Pisano; K. Rahbarnia; L. Ryć; O. Schmitz; S. Schmuck; W. Schneider; T. Schröder; H. Schuhmacher; B. Schweer; B. Standley; T. Stange; L. Stephey; J. Svensson; T. Szabolics; T. Szepesi; H. Thomsen; J. M. Travere; H. Trimino Mora; H. Tsuchiya; G. M. Weir; U. Wenzel; A. Werner; B. Wiegel; T. Windisch; R. Wolf; G. A. Wurden; D. Zhang; A. Zimbal; S. Zoletnik

doi:10.1063/1.4964376

Overview of diagnostic performance and results for the first operation phase in Wendelstein 7-X (invited)

M. Krychowiak^*, A. Adnan, A. Alonso, T. Andreeva, J. Baldzuhn, T. Barbui, M. Beurskens, W. Biel, C. Biedermann, B. D. Blackwell, H. S. Bosch, S. Bozhenkov, R. Brakel, T. Bräuer, B. Brotas De Carvalho, R. Burhenn, B. Buttenschön, A. Cappa, G. Cseh, A. CzarneckaA. Dinklage, P. Drews, A. Dzikowicka, F. Effenberg, M. Endler, V. Erckmann, T. Estrada, O. Ford, T. Fornal, H. Frerichs, G. Fuchert, J. Geiger, O. Grulke, J. H. Harris, H. J. Hartfuß, D. Hartmann, D. Hathiramani, M. Hirsch, U. Höfel, S. Jabłoński, M. W. Jakubowski, J. Kaczmarczyk, T. Klinger, S. Klose, J. Knauer, G. Kocsis, R. König, P. Kornejew, A. Krämer-Flecken, N. Krawczyk, T. Kremeyer, I. Ksiazek, M. Kubkowska, A. Langenberg, H. P. Laqua, M. Laux, S. Lazerson, Y. Liang, S. C. Liu, A. Lorenz, A. O. Marchuk, S. Marsen, V. Moncada, D. Naujoks, H. Neilson, O. Neubauer, U. Neuner, H. Niemann, J. W. Oosterbeek, M. Otte, N. Pablant, E. Pasch, T. Sunn Pedersen, F. Pisano, K. Rahbarnia, L. Ryć, O. Schmitz, S. Schmuck, W. Schneider, T. Schröder, H. Schuhmacher, B. Schweer, B. Standley, T. Stange, L. Stephey, J. Svensson, T. Szabolics, T. Szepesi, H. Thomsen, J. M. Travere, H. Trimino Mora, H. Tsuchiya, G. M. Weir, U. Wenzel, A. Werner, B. Wiegel, T. Windisch, R. Wolf, G. A. Wurden, D. Zhang, A. Zimbal, S. Zoletnik

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

Wendelstein 7-X, a superconducting optimized stellarator built in Greifswald/Germany, started its first plasmas with the last closed flux surface (LCFS) defined by 5 uncooled graphite limiters in December 2015. At the end of the 10 weeks long experimental campaign (OP1.1) more than 20 independent diagnostic systems were in operation, allowing detailed studies of many interesting plasma phenomena. For example, fast neutral gas manometers supported by video cameras (including one fast-frame camera with frame rates of tens of kHz) as well as visible cameras with different interference filters, with field of views covering all ten half-modules of the stellarator, discovered a MARFE-like radiation zone on the inboard side of machine module 4. This structure is presumably triggered by an inadvertent plasma-wall interaction in module 4 resulting in a high impurity influx that terminates some discharges by radiation cooling. The main plasma parameters achieved in OP1.1 exceeded predicted values in discharges of a length reaching 6 s. Although OP1.1 is characterized by short pulses, many of the diagnostics are already designed for quasi-steady state operation of 30 min discharges heated at 10 MW of ECRH. An overview of diagnostic performance for OP1.1 is given, including some highlights from the physics campaigns.

Original language	English
Article number	11D304
Journal	Review of Scientific Instruments
Volume	87
Issue number	11
DOIs	https://doi.org/10.1063/1.4964376
Publication status	Published - 1 Nov 2016

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10.1063/1.4964376

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Krychowiak, M., Adnan, A., Alonso, A., Andreeva, T., Baldzuhn, J., Barbui, T., Beurskens, M., Biel, W., Biedermann, C., Blackwell, B. D., Bosch, H. S., Bozhenkov, S., Brakel, R., Bräuer, T., Brotas De Carvalho, B., Burhenn, R., Buttenschön, B., Cappa, A., Cseh, G., ... Zoletnik, S. (2016). Overview of diagnostic performance and results for the first operation phase in Wendelstein 7-X (invited). Review of Scientific Instruments, 87(11), Article 11D304. https://doi.org/10.1063/1.4964376

@article{850545e199a44f4194019d79620a3611,

title = "Overview of diagnostic performance and results for the first operation phase in Wendelstein 7-X (invited)",

abstract = "Wendelstein 7-X, a superconducting optimized stellarator built in Greifswald/Germany, started its first plasmas with the last closed flux surface (LCFS) defined by 5 uncooled graphite limiters in December 2015. At the end of the 10 weeks long experimental campaign (OP1.1) more than 20 independent diagnostic systems were in operation, allowing detailed studies of many interesting plasma phenomena. For example, fast neutral gas manometers supported by video cameras (including one fast-frame camera with frame rates of tens of kHz) as well as visible cameras with different interference filters, with field of views covering all ten half-modules of the stellarator, discovered a MARFE-like radiation zone on the inboard side of machine module 4. This structure is presumably triggered by an inadvertent plasma-wall interaction in module 4 resulting in a high impurity influx that terminates some discharges by radiation cooling. The main plasma parameters achieved in OP1.1 exceeded predicted values in discharges of a length reaching 6 s. Although OP1.1 is characterized by short pulses, many of the diagnostics are already designed for quasi-steady state operation of 30 min discharges heated at 10 MW of ECRH. An overview of diagnostic performance for OP1.1 is given, including some highlights from the physics campaigns.",

author = "M. Krychowiak and A. Adnan and A. Alonso and T. Andreeva and J. Baldzuhn and T. Barbui and M. Beurskens and W. Biel and C. Biedermann and Blackwell, {B. D.} and Bosch, {H. S.} and S. Bozhenkov and R. Brakel and T. Br{\"a}uer and {Brotas De Carvalho}, B. and R. Burhenn and B. Buttensch{\"o}n and A. Cappa and G. Cseh and A. Czarnecka and A. Dinklage and P. Drews and A. Dzikowicka and F. Effenberg and M. Endler and V. Erckmann and T. Estrada and O. Ford and T. Fornal and H. Frerichs and G. Fuchert and J. Geiger and O. Grulke and Harris, {J. H.} and Hartfu{\ss}, {H. J.} and D. Hartmann and D. Hathiramani and M. Hirsch and U. H{\"o}fel and S. Jab{\l}o{\'n}ski and Jakubowski, {M. W.} and J. Kaczmarczyk and T. Klinger and S. Klose and J. Knauer and G. Kocsis and R. K{\"o}nig and P. Kornejew and A. Kr{\"a}mer-Flecken and N. Krawczyk and T. Kremeyer and I. Ksiazek and M. Kubkowska and A. Langenberg and Laqua, {H. P.} and M. Laux and S. Lazerson and Y. Liang and Liu, {S. C.} and A. Lorenz and Marchuk, {A. O.} and S. Marsen and V. Moncada and D. Naujoks and H. Neilson and O. Neubauer and U. Neuner and H. Niemann and Oosterbeek, {J. W.} and M. Otte and N. Pablant and E. Pasch and {Sunn Pedersen}, T. and F. Pisano and K. Rahbarnia and L. Ry{\'c} and O. Schmitz and S. Schmuck and W. Schneider and T. Schr{\"o}der and H. Schuhmacher and B. Schweer and B. Standley and T. Stange and L. Stephey and J. Svensson and T. Szabolics and T. Szepesi and H. Thomsen and Travere, {J. M.} and {Trimino Mora}, H. and H. Tsuchiya and Weir, {G. M.} and U. Wenzel and A. Werner and B. Wiegel and T. Windisch and R. Wolf and Wurden, {G. A.} and D. Zhang and A. Zimbal and S. Zoletnik",

note = "Publisher Copyright: {\textcopyright} 2016 EURATOM.",

year = "2016",

month = nov,

day = "1",

doi = "10.1063/1.4964376",

language = "English",

volume = "87",

journal = "Review of Scientific Instruments",

issn = "0034-6748",

publisher = "American Institute of Physics",

number = "11",

}

Krychowiak, M, Adnan, A, Alonso, A, Andreeva, T, Baldzuhn, J, Barbui, T, Beurskens, M, Biel, W, Biedermann, C, Blackwell, BD, Bosch, HS, Bozhenkov, S, Brakel, R, Bräuer, T, Brotas De Carvalho, B, Burhenn, R, Buttenschön, B, Cappa, A, Cseh, G, Czarnecka, A, Dinklage, A, Drews, P, Dzikowicka, A, Effenberg, F, Endler, M, Erckmann, V, Estrada, T, Ford, O, Fornal, T, Frerichs, H, Fuchert, G, Geiger, J, Grulke, O, Harris, JH, Hartfuß, HJ, Hartmann, D, Hathiramani, D, Hirsch, M, Höfel, U, Jabłoński, S, Jakubowski, MW, Kaczmarczyk, J, Klinger, T, Klose, S, Knauer, J, Kocsis, G, König, R, Kornejew, P, Krämer-Flecken, A, Krawczyk, N, Kremeyer, T, Ksiazek, I, Kubkowska, M, Langenberg, A, Laqua, HP, Laux, M, Lazerson, S, Liang, Y, Liu, SC, Lorenz, A, Marchuk, AO, Marsen, S, Moncada, V, Naujoks, D, Neilson, H, Neubauer, O, Neuner, U, Niemann, H, Oosterbeek, JW, Otte, M, Pablant, N, Pasch, E, Sunn Pedersen, T, Pisano, F, Rahbarnia, K, Ryć, L, Schmitz, O, Schmuck, S, Schneider, W, Schröder, T, Schuhmacher, H, Schweer, B, Standley, B, Stange, T, Stephey, L, Svensson, J, Szabolics, T, Szepesi, T, Thomsen, H, Travere, JM, Trimino Mora, H, Tsuchiya, H, Weir, GM, Wenzel, U, Werner, A, Wiegel, B, Windisch, T, Wolf, R, Wurden, GA, Zhang, D, Zimbal, A & Zoletnik, S 2016, 'Overview of diagnostic performance and results for the first operation phase in Wendelstein 7-X (invited)', Review of Scientific Instruments, vol. 87, no. 11, 11D304. https://doi.org/10.1063/1.4964376

TY - JOUR

T1 - Overview of diagnostic performance and results for the first operation phase in Wendelstein 7-X (invited)

AU - Krychowiak, M.

AU - Adnan, A.

AU - Alonso, A.

AU - Andreeva, T.

AU - Baldzuhn, J.

AU - Barbui, T.

AU - Beurskens, M.

AU - Biel, W.

AU - Biedermann, C.

AU - Blackwell, B. D.

AU - Bosch, H. S.

AU - Bozhenkov, S.

AU - Brakel, R.

AU - Bräuer, T.

AU - Brotas De Carvalho, B.

AU - Burhenn, R.

AU - Buttenschön, B.

AU - Cappa, A.

AU - Cseh, G.

AU - Czarnecka, A.

AU - Dinklage, A.

AU - Drews, P.

AU - Dzikowicka, A.

AU - Effenberg, F.

AU - Endler, M.

AU - Erckmann, V.

AU - Estrada, T.

AU - Ford, O.

AU - Fornal, T.

AU - Frerichs, H.

AU - Fuchert, G.

AU - Geiger, J.

AU - Grulke, O.

AU - Harris, J. H.

AU - Hartfuß, H. J.

AU - Hartmann, D.

AU - Hathiramani, D.

AU - Hirsch, M.

AU - Höfel, U.

AU - Jabłoński, S.

AU - Jakubowski, M. W.

AU - Kaczmarczyk, J.

AU - Klinger, T.

AU - Klose, S.

AU - Knauer, J.

AU - Kocsis, G.

AU - König, R.

AU - Kornejew, P.

AU - Krämer-Flecken, A.

AU - Krawczyk, N.

AU - Kremeyer, T.

AU - Ksiazek, I.

AU - Kubkowska, M.

AU - Langenberg, A.

AU - Laqua, H. P.

AU - Laux, M.

AU - Lazerson, S.

AU - Liang, Y.

AU - Liu, S. C.

AU - Lorenz, A.

AU - Marchuk, A. O.

AU - Marsen, S.

AU - Moncada, V.

AU - Naujoks, D.

AU - Neilson, H.

AU - Neubauer, O.

AU - Neuner, U.

AU - Niemann, H.

AU - Oosterbeek, J. W.

AU - Otte, M.

AU - Pablant, N.

AU - Pasch, E.

AU - Sunn Pedersen, T.

AU - Pisano, F.

AU - Rahbarnia, K.

AU - Ryć, L.

AU - Schmitz, O.

AU - Schmuck, S.

AU - Schneider, W.

AU - Schröder, T.

AU - Schuhmacher, H.

AU - Schweer, B.

AU - Standley, B.

AU - Stange, T.

AU - Stephey, L.

AU - Svensson, J.

AU - Szabolics, T.

AU - Szepesi, T.

AU - Thomsen, H.

AU - Travere, J. M.

AU - Trimino Mora, H.

AU - Tsuchiya, H.

AU - Weir, G. M.

AU - Wenzel, U.

AU - Werner, A.

AU - Wiegel, B.

AU - Windisch, T.

AU - Wolf, R.

AU - Wurden, G. A.

AU - Zhang, D.

AU - Zimbal, A.

AU - Zoletnik, S.

PY - 2016/11/1

Y1 - 2016/11/1

N2 - Wendelstein 7-X, a superconducting optimized stellarator built in Greifswald/Germany, started its first plasmas with the last closed flux surface (LCFS) defined by 5 uncooled graphite limiters in December 2015. At the end of the 10 weeks long experimental campaign (OP1.1) more than 20 independent diagnostic systems were in operation, allowing detailed studies of many interesting plasma phenomena. For example, fast neutral gas manometers supported by video cameras (including one fast-frame camera with frame rates of tens of kHz) as well as visible cameras with different interference filters, with field of views covering all ten half-modules of the stellarator, discovered a MARFE-like radiation zone on the inboard side of machine module 4. This structure is presumably triggered by an inadvertent plasma-wall interaction in module 4 resulting in a high impurity influx that terminates some discharges by radiation cooling. The main plasma parameters achieved in OP1.1 exceeded predicted values in discharges of a length reaching 6 s. Although OP1.1 is characterized by short pulses, many of the diagnostics are already designed for quasi-steady state operation of 30 min discharges heated at 10 MW of ECRH. An overview of diagnostic performance for OP1.1 is given, including some highlights from the physics campaigns.

AB - Wendelstein 7-X, a superconducting optimized stellarator built in Greifswald/Germany, started its first plasmas with the last closed flux surface (LCFS) defined by 5 uncooled graphite limiters in December 2015. At the end of the 10 weeks long experimental campaign (OP1.1) more than 20 independent diagnostic systems were in operation, allowing detailed studies of many interesting plasma phenomena. For example, fast neutral gas manometers supported by video cameras (including one fast-frame camera with frame rates of tens of kHz) as well as visible cameras with different interference filters, with field of views covering all ten half-modules of the stellarator, discovered a MARFE-like radiation zone on the inboard side of machine module 4. This structure is presumably triggered by an inadvertent plasma-wall interaction in module 4 resulting in a high impurity influx that terminates some discharges by radiation cooling. The main plasma parameters achieved in OP1.1 exceeded predicted values in discharges of a length reaching 6 s. Although OP1.1 is characterized by short pulses, many of the diagnostics are already designed for quasi-steady state operation of 30 min discharges heated at 10 MW of ECRH. An overview of diagnostic performance for OP1.1 is given, including some highlights from the physics campaigns.

UR - http://www.scopus.com/inward/record.url?scp=84993967144&partnerID=8YFLogxK

U2 - 10.1063/1.4964376

DO - 10.1063/1.4964376

M3 - Article

SN - 0034-6748

VL - 87

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 11

M1 - 11D304

ER -

Overview of diagnostic performance and results for the first operation phase in Wendelstein 7-X (invited)

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