Zobrazeno 1 - 10
of 3 059
pro vyhledávání: '"Geiger J"'
Autor:
Krämer-Flecken, A., Proll, J. H. E., Weir, G., Costello, P., Fuchert, G., Geiger, J., Heuraux, S., Knieps, A., Langenberg, A., Mendes, S. Vaz, Pablant, N., Pasch, E., Rahbarnia, K., Sabot, R., Salazar, L., Smith, H. M., Thomsen, H., Windisch, T., Xiang, H. M., W7-X-team, the
In the past, quasi coherent modes were reported for nearly all tokamaks. The general definition describes modes as quasi coherent when the magnitude squared coherence is in the range of \SIrange{0.3}{0.6}{}. Quasi coherent modes are observed in the p
Externí odkaz:
http://arxiv.org/abs/2408.12900
Autor:
Chaudhary N., Hirsch M., Andreeva T., Geiger J., Hoefel U., Rahbarnia K., Wurden G. A., Wolf R. C.
Publikováno v:
EPJ Web of Conferences, Vol 277, p 03012 (2023)
Externí odkaz:
https://doaj.org/article/aa568b711d6f4e429128961b5d25fd7b
Autor:
Chaudhary N., Hirsch M., Andreeva T., Geiger J., Hoefel U., Rahbarnia K., Wurden G. A., Wolf R. C.
Publikováno v:
EPJ Web of Conferences, Vol 277, p 03004 (2023)
A magnetic configuration scan was performed at Wendelstein 7-X stellarator by varying the rotational transform to analyze the plasma confinement for magnetic configurations with different edge magnetic island locations and sizes. For the magnetic con
Externí odkaz:
https://doaj.org/article/4309d0073ff145208eb75b3c6fdbece5
Autor:
Pucher, S., Klüsener, V., Spriestersbach, F., Geiger, J., Schindewolf, A., Bloch, I., Blatt, S.
Publikováno v:
Physical Review Letters 132, 150605 (2024)
We demonstrate coherent control of the fine-structure qubit in neutral strontium atoms. This qubit is encoded in the metastable $^3\mathrm{P}_2$ and $^3\mathrm{P}_0$ states, coupled by a Raman transition. Using a magnetic quadrupole transition, we de
Externí odkaz:
http://arxiv.org/abs/2401.11054
Autor:
Marushchenko N.B., Beidler C.D., Erckmann V., Geiger J., Helander P., Laqua H.P, Maassberg H., Turkin Y.
Publikováno v:
EPJ Web of Conferences, Vol 87, p 01007 (2015)
Using specific features of the magnetic equilibrium in the W7-X stellarator, the ECRH scenarios with combined X2 and X3 modes are discussed. The RF beams for operation with X2 and X3 modes need to be launched from low- and, via the remote steering la
Externí odkaz:
https://doaj.org/article/16795fef26f94b83bd7a180e69c7926f
Autor:
González-Jerez, A., Xanthopoulos, P., García-Regaña, J. M., Calvo, I., Alcusón, J., Bañón-Navarro, A., Barnes, M., Parra, F. I., Geiger, J.
The first experimental campaigns have proven that, due to the optimization of the magnetic configuration with respect to neoclassical transport, the contribution of turbulence is essential to understand and predict the total particle and energy trans
Externí odkaz:
http://arxiv.org/abs/2107.06060
Akademický článek
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Akademický článek
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K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Autor:
Laqua H.P., Helander P., Geiger J., Erckmann V., Beidler C. D., Marushchenko N. B., Maassberg H., Turkin Y.
Publikováno v:
EPJ Web of Conferences, Vol 32, p 01004 (2012)
The main ECRH scenarios for the W7-X Stellarator are described. Both X2 (low and moderate densities) and O2 scenarios (high density) have been studied. Since O2 scenario cannot be realized without pre-heating, transition from X2 to O2 scenarios has b
Externí odkaz:
https://doaj.org/article/6805347f97904370806b542330d40acb
Autor:
Äkäslompolo, S., Drewelow, P., Gao, Y., Ali, A., Biedermann, C., Bozhenkov, S., Dhard, C. P., Endler, M., Fellinger, J., Ford, O. P., Geiger, B., Geiger, J., Harderd, N. den, Hartmann, D., Hathiramani, D., Isobe, M., Jakubowski, M., Kazakov, Y., Killer, C., Lazerson, S., Mayerd, M., McNeely, P., Naujoks, D., Neelis, T. W. C., Kontula, J., Kurki-Suonio, T., Niemann, H., Ogawa, K., Pisano, F., Poloskei, P. Zs., Sitjes, A. Puig, Rahbarnia, K., Rust, N., Schmitt, J. C., Sleczka, M., Vano, L., van Vuuren, A., Wurden, G., Wolf, R. C., Team, the W7-X
Publikováno v:
S. Akaslompolo et al 2019 JINST 14 C10012
The first fast ion experiments in Wendelstein 7-X were performed in 2018. They are one of the first steps in demonstrating the optimised fast ion confinement of the stellarator. The fast ions were produced with a neutral beam injection (NBI) system a
Externí odkaz:
http://arxiv.org/abs/1906.07457