@article{MTMT:31324146, title = {Parameter dependences of the separatrix density in nitrogen seeded ASDEX Upgrade H-mode discharges}, url = {https://m2.mtmt.hu/api/publication/31324146}, author = {Kallenbach, A and Sun, HJ and Eich, T and Carralero, D and Hobirk, J and Scarabosio, A and Siccinio, M}, doi = {10.1088/1361-6587/aaab21}, journal-iso = {PLASMA PHYS CONTR F}, journal = {PLASMA PHYSICS AND CONTROLLED FUSION}, volume = {60}, unique-id = {31324146}, issn = {0741-3335}, year = {2018}, eissn = {1361-6587} } @article{MTMT:3059223, title = {Pedestal confinement and stability in JET-ILW ELMy H-modes}, url = {https://m2.mtmt.hu/api/publication/3059223}, author = {Maggi, C F and Saarelma, S and Casson, F J and Challis, C and de la, Luna E and Frassinetti, L and Giroud, C and Joffrin, E and Simpson, J and Beurskens, M and Chapman, I and Hobirk, J and Leyland, M and Lomas, P and Lowry, C and Nunes, I and Rimini, F and Sips, A C C and Urano, H}, doi = {10.1088/0029-5515/55/11/113031}, journal-iso = {NUCL FUSION}, journal = {NUCLEAR FUSION}, volume = {55}, unique-id = {3059223}, issn = {0029-5515}, abstract = {New experiments in 2013-2014 have investigated the physics responsible for the decrease in H-mode pedestal confinement observed in the initial phase of JET-ILW operation (2012 Experimental Campaigns). The effects of plasma triangularity, global beta and neutrals on pedestal confinement and stability have been investigated systematically. The stability of JET-ILW pedestals is analysed in the framework of the peeling-ballooning model and the model assumptions of the pedestal predictive code EPED. Low D neutrals content in the plasma, achieved either by low D2 gas injection rates or by divertor configurations with optimum pumping, and high beta are necessary conditions for good pedestal (and core) performance. In such conditions the pedestal stability is consistent with the peeling-ballooning paradigm. Moderate to high D2 gas rates, required for W control and stable H-mode operation with the ILW, lead to increased D neutrals content in the plasma and additional physics in the pedestal models may be required to explain the onset of the ELM instability. The changes in H-mode performance associated with the change in JET wall composition from C to Be/W point to D neutrals and low-Z impurities playing a role in pedestal stability, elements which are not currently included in pedestal models. These aspects need to be addressed in order to progress towards full predictive capability of the pedestal height.}, year = {2015}, eissn = {1741-4326} } @article{MTMT:3004431, title = {Reflectometry-based plasma position feedback control demonstration at ASDEX Upgrade}, url = {https://m2.mtmt.hu/api/publication/3004431}, author = {Santos, J and Guimarais, L and Zilker, M and Treutterer, W and Manso, M and Stroth, U and Adamek, J and Aho-Mantila, L and Akaslompolo, S and Amdor, C and Angioni, C and Balden, M and Bardin, S and Barrera, Orte L and Behler, K and Belonohy, E and Bergmann, A and Bernert, M and Bilato, R and Birkenmeier, G and Bobkov, V and Boom, J and Bottereau, C and Bottino, A and Braun, F and Brezinsek, S and Brochard, T and Brudgam and Buhler and Burckhart and Casson, FJ and Chankin, A and Chapman, I and Clairet, F and Classen, IGJ and Coenen, JW and Conway, GD and Coster, DP and Curran, D and da Silva, F and de Marne, P and D’Inca, R and Douai, D and Drube, R and Dunne, M and Dux, R and Eich, T and Eixenberger, H and Endstrasser, N and Engelhardt, K and Esposito, B and Fable, E and Fischer, R and Funfgelder, H and Fuchs, JC and Gal, K and Garcıa, Munoz M and GeigerB and Giannone, L and Gorler, T and da Graca, S and Greuner, H and Gruber, O and Gude, A and Guimarais, L and Gunter, S and Haas, G and Hakola, AH and Hangan, D and Happel, T and Hartl, T and Hauff, T and Heinemann, B and Herrmann, A and Hobirk, J and Hohnle, H and Holzl, M and Hopf, C and Houben, A and Igochine, V and Ionita, C and Janzer, A and Jenko, F and Kantor, M and Kasemann, C-P and Kallenbach, A and Kálvin, Sándor Csaba and Kantor, M and Kappatou, A and Kardaun, O and Kasparek, W and Kaufmann, M and Kirk, A and Klingshirn, H-J and Kocan, M and Kocsis, G and Konz, C and Koslowski, R and Krieger, K and Kubic, M and Kurki-Suonio, T and Kurzan, B and Lackner, K and Lang, PT and Lauber, P and Laux, M and Lazaros, A and Leipold, F and Leuterer, F and Lindig, S and Lisgo, S and Lohs, A and Lunt, T and Maier, H and Makkonen, T and Mank, K and Manso, M-E and Maraschek, M and Mayer, M and McCarthy, PJ and McDermott, R and Mehlmann, F and Meister, H and Menchero, L and Meo, F and Merkel, P and Merkel, R and Mertens, V and Merz, F and Mlynek, A and Monaco, F and Muller, S and Muller, HW and Munich, M and Neu, G and Neu, R and Neuwirth, D and Nocente, M and Nold, B and Noterdaeme, J-M and Pautasso, G and Pereverzev, G and Plockl, B and Podoba, Y and Pompon, F and Poli, E and Polozhiy, K and Potzel, S and Puschel, MJ and Putterich, T and Rathgeber, SK and Raupp, G and Reich, M and Reimold, F and Ribeiro, T and Riedl, R and Rohde, V and v, Rooij G and Roth, J and Rott, M and Ryter, F and Salewski, M and Santos, S and Sauter, P and Scarabosio, A and Schall, G and Schmid, K and Schneider, PA and Schneider, W and Schrittwiese, Rr and Schubert, M and Schweinzer, J and Scott, B and Sempf, M and Sertoli, M and Siccinio, M and Sieglin, B and Sigalov, A and Silva, A and Sommer, F and Stäbler, A and Stober, J and Streibl, B and Strumberger, E and Sugiyama, K and Suttrop, W and Tala, T and Tardini, G and Teschke, M and Tichmann, C and Told, D and Treutterer, W and Tsalas, M and Van, Zeeland MA and Varela, P and Veres, Gábor and Vicente, J and Vianello, N and Vierle, T and Viezzer, E and Viola, B and Vorpahl, C and Wachowski, M and Wagner, D and Wauters, T and Weller, A and Wenninger, R and Wieland, R and Willensdorfer, M and Wischmeier, M and Wolfrum, E and Wursching, E and Yu, Q and Zammuto, I and Zasche, D and Zehetbauer, T and Zhang, Y and Zilker, M and Zohm, H}, doi = {10.1088/0029-5515/52/3/032003}, journal-iso = {NUCL FUSION}, journal = {NUCLEAR FUSION}, volume = {52}, unique-id = {3004431}, issn = {0029-5515}, year = {2012}, eissn = {1741-4326} } @article{MTMT:1440894, title = {Divertor power load feedback with nitrogen seeding in ASDEX Upgrade}, url = {https://m2.mtmt.hu/api/publication/1440894}, author = {Kallenbach, A and Dux, R and Fuchs, JC and Fischer, R and Geiger, B and Giannone, L and Herrmann, A and Lunt, T and Kallenbach, A and Adamek, J and Aho-Mantila, L and Äkäslompolo, S and Angioni, C and Atanasiu, C V and Balden, M and Behler, K and Belonohy, E and Bergmann, A and Bernert, M and Bilato, R and Bobkov, V and Boom, J and Bottino, A and Braun, F and Brüdgam, M and Buhler, A and Burckhart, A and Chankin, A and Classen, I G J and Conway, G D and Coster, D P and de Marné, P and D'Inca, R and Drube, R and Dux, R and Eich, T and Endstrasser, N and Engelhardt, K and Esposito, B and Fable, E and Fahrbach, H -U and Fattorini, L and Fischer, R and Flaws, A and Fünfgelder, H and Fuchs, J C and Gál, K and García, Muñoz M and Geiger, B and Gemisic, Adamov M and Giannone, L and Giroud, C and Görler, T and da Graca, S and Greuner, H and Gruber, O and Gude, A and Günter, S and Haas, G and Hakola, A H and Hangan, D and Happel, T and Hauff, T and Heinemann, B and Herrmann, A and Hicks, N and Hobirk, J and Höhnle, H and Hölzl, M and Hopf, C and Horton, L and Huart, M and Igochine, V and Ionita, C and Janzer, A and Jenko, F and Käsemann, C -P and Kálvin, Sándor Csaba and Kardaun, O and Kaufmann, M and Kirk, A and Klingshirn, H -J and Kocan, M and Kocsis, G and Kollotzek, H and Konz, C and Koslowski, R and Krieger, K and Kurki-Suonio, T and Kurzan, B and Lackner, K and Lang, P T and Lauber, P and Laux, M and Leipold, Frank and Leuterer, F and Lohs, A and Luhmann, N C Jr and Lunt, T and Lyssoivan, A and Maier, H and Maggi, C and Mank, K and Manso, M -E and Maraschek, M and Martin, P and Mayer, M and McCarthy, P J and McDermott, R and Meister, H and Menchero, L and Meo, Fernando and Merkel, P and Merkel, R and Mertens, V and Merz, F and Mlynek, A and Monaco, F and Müller, H W and Münich, M and Murmann, H and Neu, G and Neu, R and Nold, B and Noterdaeme, J -M and Park, H K and Pautasso, G and Pereverzev, G and Podoba, Y and Pompon, F and Poli, E and Polochiy, K and Potzel, S and Prechtl, M and Püschel, M J and Pütterich, T and Rathgeber, S K and Raupp, G and Reich, M and Reiter, B and Ribeiro, T and Riedl, R and Rohde, V and Roth, J and Rott, M and Ryter, F and Sandmann, W and Santos, J and Sassenberg, K and Sauter, P and Scarabosio, A and Schall, G and Schmid, K and Schneider, P A and Schneider, W and Schramm, G and Schrittwieser, R and Schweinzer, J and Scott, B and Sempf, M and Serra, F and Sertoli, M and Siccinio, M and Sigalov, A and Silva, A and Sips, A C C and Sommer, F and Stäbler, A and Stober, J and Streibl, B and Strumberger, E and Sugiyama, K and Suttrop, W and Szepesi, T and Tardini, G and Tichmann, C and Told, D and Treutterer, W and Urso, L and Varela, P and Vincente, J and Vianello, N and Vierle, T and Viezzer, E and Vorpahl, C and Wagner, D and Weller, A and Wenninger, R and Wieland, B and Wigger, C and Willensdorfer, M and Wischmeier, M and Wolfrum, E and Würsching, E and Yadikin, D and Yu, Q and Zammuto, I and Zasche, D and Zehetbauer, T and Zhang, Y and Zilker, M and Zohm, H}, doi = {10.1088/0741-3335/52/5/055002}, journal-iso = {PLASMA PHYS CONTR F}, journal = {PLASMA PHYSICS AND CONTROLLED FUSION}, volume = {52}, unique-id = {1440894}, issn = {0741-3335}, abstract = {Feedback control of the divertor power load by means of nitrogen seeding has been developed into a routine operational tool in the all-tungsten clad ASDEX Upgrade tokamak. For heating powers above about 12 MW, its use has become inevitable to protect the divertor tungsten coating under boronized conditions. The use of nitrogen seeding is accompanied by improved energy confinement due to higher core plasma temperatures, which more than compensates the negative effect of plasma dilution by nitrogen on the neutron rate. This paper describes the technical details of the feedback controller. Asimple model for its underlying physics allows the prediction of its behaviour and the optimization of the feedback gain coefficients used. Storage and release of nitrogen in tungsten surfaces were found to have substantial impact on the behaviour of the seeded plasma, resulting in increased nitrogen consumption with unloaded walls and a latency of nitrogen release over several discharges after its injection. Nitrogen is released from tungsten plasma facing components with moderate surface temperature in a sputtering-like process; therefore no uncontrolled excursions of the nitrogen wall release are observed. Overall, very stable operation of the high-Z tokamak is possible with nitrogen seeding, where core radiative losses are avoided due to its low atomic charge Z and a high ELM frequency is maintained.}, year = {2010}, eissn = {1361-6587} } @article{MTMT:2041495, title = {Main chamber high recycling on ASDEX upgrade}, url = {https://m2.mtmt.hu/api/publication/2041495}, author = {McCormick, K and Dux, R and Fischer, R and Scarabosio, A and Mayer, M and Andrzejczuk, M and Dux, R and Fortuna-Zalesna, E and Hakola, A and Koivuranta, S and Krieger, K and Kurzydlowski, KJ and Likonen, J and Matern, G and Neu, R and Ramos, G and Rasinski, M and Rohde, V and Sugiyama, K and Wiltner, A and Zielinski, W and Kallenbach, A and Adamek, J and Aho-Mantila, L and Äkäslompolo, S and Angioni, C and Atanasiu, C V and Balden, M and Behler, K and Belonohy, E and Bergmann, A and Bernert, M and Bilato, R and Bobkov, V and Boom, J and Bottino, A and Braun, F and Brüdgam, M and Buhler, A and Burckhart, A and Chankin, A and Classen, I G J and Conway, G D and Coster, D P and de Marné, P and D'Inca, R and Drube, R and Dux, R and Eich, T and Endstrasser, N and Engelhardt, K and Esposito, B and Fable, E and Fahrbach, H -U and Fattorini, L and Fischer, R and Flaws, A and Fünfgelder, H and Fuchs, J C and Gál, K and García, Muñoz M and Geiger, B and Gemisic, Adamov M and Giannone, L and Giroud, C and Görler, T and da Graca, S and Greuner, H and Gruber, O and Gude, A and Günter, S and Haas, G and Hakola, A H and Hangan, D and Happel, T and Hauff, T and Heinemann, B and Herrmann, A and Hicks, N and Hobirk, J and Höhnle, H and Hölzl, M and Hopf, C and Horton, L and Huart, M and Igochine, V and Ionita, C and Janzer, A and Jenko, F and Käsemann, C -P and Kálvin, Sándor Csaba and Kardaun, O and Kaufmann, M and Kirk, A and Klingshirn, H -J and Kocan, M and Kocsis, G and Kollotzek, H and Konz, C and Koslowski, R and Krieger, K and Kurki-Suonio, T and Kurzan, B and Lackner, K and Lang, P T and Lauber, P and Laux, M and Leipold, Frank and Leuterer, F and Lohs, A and Luhmann, N C Jr and Lunt, T and Lyssoivan, A and Maier, H and Maggi, C and Mank, K and Manso, M -E and Maraschek, M and Martin, P and Mayer, M and McCarthy, P J and McDermott, R and Meister, H and Menchero, L and Meo, Fernando and Merkel, P and Merkel, R and Mertens, V and Merz, F and Mlynek, A and Monaco, F and Müller, H W and Münich, M and Murmann, H and Neu, G and Neu, R and Nold, B and Noterdaeme, J -M and Park, H K and Pautasso, G and Pereverzev, G and Podoba, Y and Pompon, F and Poli, E and Polochiy, K and Potzel, S and Prechtl, M and Püschel, M J and Pütterich, T and Rathgeber, S K and Raupp, G and Reich, M and Reiter, B and Ribeiro, T and Riedl, R and Rohde, V and Roth, J and Rott, M and Ryter, F and Sandmann, W and Santos, J and Sassenberg, K and Sauter, P and Scarabosio, A and Schall, G and Schmid, K and Schneider, P A and Schneider, W and Schramm, G and Schrittwieser, R and Schweinzer, J and Scott, B and Sempf, M and Serra, F and Sertoli, M and Siccinio, M and Sigalov, A and Silva, A and Sips, A C C and Sommer, F and Stäbler, A and Stober, J and Streibl, B and Strumberger, E and Sugiyama, K and Suttrop, W and Szepesi, T and Tardini, G and Tichmann, C and Told, D and Treutterer, W and Urso, L and Varela, P and Vincente, J and Vianello, N and Vierle, T and Viezzer, E and Vorpahl, C and Wagner, D and Weller, A and Wenninger, R and Wieland, B and Wigger, C and Willensdorfer, M and Wischmeier, M and Wolfrum, E and Würsching, E and Yadikin, D and Yu, Q and Zammuto, I and Zasche, D and Zehetbauer, T and Zhang, Y and Zilker, M and Zohm, H}, doi = {10.1016/j.jnucmat.2009.01.145}, journal-iso = {J NUCL MATER}, journal = {JOURNAL OF NUCLEAR MATERIALS}, volume = {390-91}, unique-id = {2041495}, issn = {0022-3115}, year = {2009}, eissn = {1873-4820}, pages = {465-469} } @article{MTMT:2041497, title = {Measurements of neutral gas fluxes under different plasma and divertor regimes in ASDEX Upgrade}, url = {https://m2.mtmt.hu/api/publication/2041497}, author = {Scarabosio, A and Haas, G and Muller, HW and Pugno, R and Wischmeier, M and Mayer, M and Andrzejczuk, M and Dux, R and Fortuna-Zalesna, E and Hakola, A and Koivuranta, S and Krieger, K and Kurzydlowski, KJ and Likonen, J and Matern, G and Neu, R and Ramos, G and Rasinski, M and Rohde, V and Sugiyama, K and Wiltner, A and Zielinski, W and Kallenbach, A and Adamek, J and Aho-Mantila, L and Äkäslompolo, S and Angioni, C and Atanasiu, C V and Balden, M and Behler, K and Belonohy, E and Bergmann, A and Bernert, M and Bilato, R and Bobkov, V and Boom, J and Bottino, A and Braun, F and Brüdgam, M and Buhler, A and Burckhart, A and Chankin, A and Classen, I G J and Conway, G D and Coster, D P and de Marné, P and D'Inca, R and Drube, R and Dux, R and Eich, T and Endstrasser, N and Engelhardt, K and Esposito, B and Fable, E and Fahrbach, H -U and Fattorini, L and Fischer, R and Flaws, A and Fünfgelder, H and Fuchs, J C and Gál, K and García, Muñoz M and Geiger, B and Gemisic, Adamov M and Giannone, L and Giroud, C and Görler, T and da Graca, S and Greuner, H and Gruber, O and Gude, A and Günter, S and Haas, G and Hakola, A H and Hangan, D and Happel, T and Hauff, T and Heinemann, B and Herrmann, A and Hicks, N and Hobirk, J and Höhnle, H and Hölzl, M and Hopf, C and Horton, L and Huart, M and Igochine, V and Ionita, C and Janzer, A and Jenko, F and Käsemann, C -P and Kálvin, Sándor Csaba and Kardaun, O and Kaufmann, M and Kirk, A and Klingshirn, H -J and Kocan, M and Kocsis, G and Kollotzek, H and Konz, C and Koslowski, R and Krieger, K and Kurki-Suonio, T and Kurzan, B and Lackner, K and Lang, P T and Lauber, P and Laux, M and Leipold, Frank and Leuterer, F and Lohs, A and Luhmann, N C Jr and Lunt, T and Lyssoivan, A and Maier, H and Maggi, C and Mank, K and Manso, M -E and Maraschek, M and Martin, P and Mayer, M and McCarthy, P J and McDermott, R and Meister, H and Menchero, L and Meo, Fernando and Merkel, P and Merkel, R and Mertens, V and Merz, F and Mlynek, A and Monaco, F and Müller, H W and Münich, M and Murmann, H and Neu, G and Neu, R and Nold, B and Noterdaeme, J -M and Park, H K and Pautasso, G and Pereverzev, G and Podoba, Y and Pompon, F and Poli, E and Polochiy, K and Potzel, S and Prechtl, M and Püschel, M J and Pütterich, T and Rathgeber, S K and Raupp, G and Reich, M and Reiter, B and Ribeiro, T and Riedl, R and Rohde, V and Roth, J and Rott, M and Ryter, F and Sandmann, W and Santos, J and Sassenberg, K and Sauter, P and Scarabosio, A and Schall, G and Schmid, K and Schneider, P A and Schneider, W and Schramm, G and Schrittwieser, R and Schweinzer, J and Scott, B and Sempf, M and Serra, F and Sertoli, M and Siccinio, M and Sigalov, A and Silva, A and Sips, A C C and Sommer, F and Stäbler, A and Stober, J and Streibl, B and Strumberger, E and Sugiyama, K and Suttrop, W and Szepesi, T and Tardini, G and Tichmann, C and Told, D and Treutterer, W and Urso, L and Varela, P and Vincente, J and Vianello, N and Vierle, T and Viezzer, E and Vorpahl, C and Wagner, D and Weller, A and Wenninger, R and Wieland, B and Wigger, C and Willensdorfer, M and Wischmeier, M and Wolfrum, E and Würsching, E and Yadikin, D and Yu, Q and Zammuto, I and Zasche, D and Zehetbauer, T and Zhang, Y and Zilker, M and Zohm, H}, doi = {10.1016/j.jnucmat.2009.01.057}, journal-iso = {J NUCL MATER}, journal = {JOURNAL OF NUCLEAR MATERIALS}, volume = {390-391}, unique-id = {2041497}, issn = {0022-3115}, year = {2009}, eissn = {1873-4820}, pages = {494-497} }