Advanced search
1 file | 4.29 MB

Evolution of nitrogen concentration and ammonia production in N-2-seeded H-mode discharges at ASDEX Upgrade

(2019) NUCLEAR FUSION. 59(4).
Author
Organization
Abstract
Ammonia formation was studied in a series of dedicated nitrogen seeded H-mode discharges at ASDEX Upgrade. The evolution of ammonia formation was investigated with a reference phase before the seeding, and a long, stable flat-top nitrogen-seeded phase. It was monitored with divertor spectroscopy and analysis of the exhaust gas. The amount of the detected ammonia increased continuously over the course of five discharges with the same nitrogen seeding rate. The same trend was observed in the nitrogen density in the core plasma, as measured by charge exchange recombination spectroscopy and other signals, linked to the effects of nitrogen seeding. The results show that the rate of ammonia formation exhibited the same trend as the nitrogen density in the plasma. This density, in turn, was strongly influenced by the nitrogen wall inventory. The spatial distribution of the detected ammonia suggests that a significant contribution to the net ammonia formation is made in plasma-shaded areas, through surface reactions of neutral species.

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 4.29 MB

Citation

Please use this url to cite or link to this publication:

Chicago
Drenik, A., L. Laguardia, R. McDermott, G. Meisl, R. Neu, M. Oberkofler, E. Pawelec, et al. 2019. “Evolution of Nitrogen Concentration and Ammonia Production in N-2-seeded H-mode Discharges at ASDEX Upgrade.” Nuclear Fusion 59 (4).
APA
Drenik, A., Laguardia, L., McDermott, R., Meisl, G., Neu, R., Oberkofler, M., Pawelec, E., et al. (2019). Evolution of nitrogen concentration and ammonia production in N-2-seeded H-mode discharges at ASDEX Upgrade. NUCLEAR FUSION, 59(4).
Vancouver
1.
Drenik A, Laguardia L, McDermott R, Meisl G, Neu R, Oberkofler M, et al. Evolution of nitrogen concentration and ammonia production in N-2-seeded H-mode discharges at ASDEX Upgrade. NUCLEAR FUSION. 2019;59(4).
MLA
Drenik, A. et al. “Evolution of Nitrogen Concentration and Ammonia Production in N-2-seeded H-mode Discharges at ASDEX Upgrade.” NUCLEAR FUSION 59.4 (2019): n. pag. Print.
@article{8603642,
  abstract     = {Ammonia formation was studied in a series of dedicated nitrogen seeded H-mode discharges at ASDEX Upgrade. The evolution of ammonia formation was investigated with a reference phase before the seeding, and a long, stable flat-top nitrogen-seeded phase. It was monitored with divertor spectroscopy and analysis of the exhaust gas. The amount of the detected ammonia increased continuously over the course of five discharges with the same nitrogen seeding rate. The same trend was observed in the nitrogen density in the core plasma, as measured by charge exchange recombination spectroscopy and other signals, linked to the effects of nitrogen seeding. The results show that the rate of ammonia formation exhibited the same trend as the nitrogen density in the plasma. This density, in turn, was strongly influenced by the nitrogen wall inventory. The spatial distribution of the detected ammonia suggests that a significant contribution to the net ammonia formation is made in plasma-shaded areas, through surface reactions of neutral species.},
  articleno    = {046010},
  author       = {Drenik, A. and Laguardia, L. and McDermott, R. and Meisl, G. and Neu, R. and Oberkofler, M. and Pawelec, E. and Pitts, R. A. and Puetterich, T. and Reichbauer, T. and Rohde, V. and Seibt, M. and De Temmerman, G. and Zaplotnik, R. and Aguiam, D. and Aho-Mantila, L. and Angioni, C. and Arden, N. and Parra, R. Arredondo and Asunta, O. and de Baar, M. and Balden, M. and Behler, K. and Bergmann, A. and Bernardo, J. and Bernert, M. and Beurskens, M. and Biancalani, A. and Bilato, R. and Birkenmeier, G. and Bobkov, V. and Bock, A. and Bogomolov, A. and Bolzonella, T. and Boswirth, B. and Bottereau, C. and Bottino, A. and van den Brand, H. and Brezinsek, S. and Brida, D. and Brochard, F. and Bruhn, C. and Buchanan, J. and Buhler, A. and Burckhart, A. and Cambon-Silva, D. and Camenen, Y. and Carvalho, P. and Carrasco, G. and Cazzaniga, C. and Carr, M. and Carralero, D. and Casali, L. and Castaldo, C. and Cavedon, M. and Challis, C. and Chankin, A. and Chapman, I. and Clairet, F. and Classen, I. and Coda, S. and Coelho, R. and Coenen, J. W. and Colas, L. and Conway, G. and Costea, S. and Coster, D. P. and Croci, G. and Cseh, G. and Czarnecka, A. and D'Arcangelo, O. and Day, C. and Delogu, R. and de Marne, P. and Denk, S. and Denner, P. and Dibon, M. and D'Inca, R. and Di Siena, A. and Douai, D. and Drube, R. and Dunne, M. and Duval, B. P. and Dux, R. and Eich, T. and Elgeti, S. and Engelhardt, K. and Erdos, B. and Erofeev, I. and Esposito, B. and Fable, E. and Faitsch, M. and Fantz, U. and Faugel, H. and Felici, F. and Fietz, S. and Figueredo, A. and Fischer, R. and Ford, O. and Frassinetti, L. and Freethy, S. and Froeschle, M. and Fuchert, G. and Fuchs, J. C. and Fuenfgelder, H. and Galazka, K. and Galdon-Quiroga, J. and Gallo, A. and Gao, Y. and Garavaglia, S. and Garcia-Munoz, M. and Geiger, B. and Cianfarani, C. and Giannone, L. and Giovannozzi, E. and Gleason-Gonzalez, C. and Gloeggler, S. and Gobbin, M. and Goerler, T. and Goodman, T. and Gorini, G. and Gradic, D. and Graeter, A. and Granucci, G. and Greuner, H. and Griener, M. and Groth, M. and Gude, A. and Guenter, S. and Guimarais, L. and Haas, G. and Hakola, A. H. and Ham, C. and Happel, T. and Harrison, J. and Hatch, D. and Hauer, V. and Hayward, T. and Heinemann, B. and Heinzel, S. and Hellsten, T. and Henderson, S. and Hennequin, P. and Herrmann, A. and Heyn, E. and Hitzler, F. and Hobirk, J. and Hoelzl, M. and Hoeschen, T. and Holm, J. H. and Hopf, C. and Hoppe, F. and Horvath, L. and Houben, A. and Huber, A. and Igochine, V. and Ilkei, T. and Ivanova-Stanik, I. and Jacob, W. and Jacobsen, A. S. and Jacquot, J. and Janky, F. and Jardin, A. and Jaulmes, F. and Jenko, F. and Jensen, T. and Joffrin, E. and Kaesemann, C. and Kallenbach, A. and Kalvin, S. and Kantor, M. and Kappatou, A. and Kardaun, O. and Karhunen, J. and Kasilov, S. and Kernbichler, W. and Kim, D. and Kimmig, S. and Kirk, A. and Klingshirn, H. -J. and Koch, F. and Kocsis, G. and Koehn, A. and Kraus, M. and Krieger, K. and Krivska, A. and Kraemer-Flecken, A. and Kurki-Suonio, T. and Kurzan, B. and Lackner, K. and Laggner, F. and Lang, P. T. and Lauber, P. and Lazanyi, N. and Lazaros, A. and Lebschy, A. and Li, L. and Li, M. and Liang, Y. and Lipschultz, B. and Liu, Y. and Lohs, A. and Luhmann, N. C. and Lunt, T. and Lyssoivan, A. and Madsen, J. and Maier, H. and Maj, O. and Mailloux, J. and Maljaars, E. and Manas, P. and Mancini, A. and Manhard, A. and Manso, M. -E. and Mantica, P. and Mantsinen, M. and Manz, P. and Maraschek, M. and Martens, C. and Martin, P. and Marrelli, L. and Martitsch, A. and Mastrostefano, S. and Mayer, A. and Mayer, M. and Mazon, D. and McCarthy, P. J. and Meister, H. and Medvedeva, A. and Merkel, P. and Merkel, R. and Merle, A. and Mertens, V. and Meshcheriakov, D. and Meyer, H. and Meyer, O. and Miettunen, J. and Milanesio, D. and Mink, F. and Mlynek, A. and Monaco, F. and Moon, C. and Nazikian, R. and Nemes-Czopf, A. and Neu, G. and Neu, R. and Nielsen, A. H. and Nielsen, S. K. and Nikolaeva, V. and Nocente, M. and Noterdaeme, J. -M. and Nowak, S. and Oberparleiter, M. and Ochoukov, R. and Odstrcil, T. and Olsen, J. and Orain, F. and Palermo, F. and Papp, G. and Perez, I. Paradela and Pautasso, G. and Enzel, F. and Petersson, P. and Pinzon, J. and Piovesan, P. and Piron, C. and Plaum, B. and Ploeckl, B. and Plyusnin, V. and Pokol, G. and Poli, E. and Porte, L. and Potzel, S. and Prisiazhniuk, D. and Ramisch, M. and Rapson, C. and Rasmussen, J. and Raupp, G. and Refy, D. and Reich, M. and Reimold, F. and Ribeiro, T. and Riedl, R. and Rittich, D. and Rocchi, G. and Rodriguez-Ramos, M. and Rohde, V. and Ross, A. and Rott, M. and Rubel, M. and Ryan, D. and Ryter, F. and Saarelma, S. and Salewski, M. and Salmi, A. and Sanchis-Sanchez, L. and Santos, G. and Santos, J. and Sauter, O. and Scarabosio, A. and Schall, G. and Schmid, K. and Schmitz, O. and Schneider, P. A. and Schneller, M. and Schrittwieser, R. and Schubert, M. and Schwarz-Selinger, T. and Schweinzer, J. and Scott, B. and Sehmer, T. and Sertoli, M. and Shabbir, A. and Shalpegin, A. and Shao, L. and Sharapov, S. and Siccinio, M. and Sieglin, B. and Sigalov, A. and Silva, A. and Silva, C. and Simon, P. and Simpson, J. and Snicker, A. and Sommariva, C. and Sozzi, C. and Spolaore, M. and Stejner, M. and Stober, J. and Stobbe, F. and Stroth, U. and Strumberger, E. and Suarez, G. and Sugiyama, K. and Sun, H. -J. and Suttrop, W. and Szepesi, T. and Tal, B. and Tala, T. and Tardini, G. and Tardocchi, M. and Terranova, D. and Tierens, W. and Told, D. and Tudisco, O. and Trevisan, G. and Treutterer, W. and Trier, E. and Tripsky, M. and Valisa, M. and Valovic, M. and Vanovac, B. and Varela, P. and Varoutis, S. and Verdoolaege, Geert and Vezinet, D. and Vianello, N. and Vicente, J. and Vierle, T. and Viezzer, E. and von Toussaint, U. and Wagner, D. and Wang, N. and Wang, X. and Weidl, M. and Weiland, M. and White, A. E. and Willensdorfer, M. and Wiringer, B. and Wischmeier, M. and Wolf, R. and Wolfrum, E. and Xiang, L. and Yang, Q. and Yang, Z. and Yu, Q. and Zagorski, R. and Zammuto, I. and Zarzoso, D. and Zhang, W. and van Zeeland, M. and Zehetbauer, T. and Zilker, M. and Zoletnik, S. and Zohm, H.},
  issn         = {0029-5515},
  journal      = {NUCLEAR FUSION},
  language     = {eng},
  number       = {4},
  title        = {Evolution of nitrogen concentration and ammonia production in N-2-seeded H-mode discharges at ASDEX Upgrade},
  url          = {http://dx.doi.org/10.1088/1741-4326/aafe23},
  volume       = {59},
  year         = {2019},
}

Altmetric
View in Altmetric
Web of Science
Times cited: