Zobrazeno 1 - 10
of 44
pro vyhledávání: '"K. Höthker"'
Publikováno v:
Contributions to Plasma Physics. 38:121-126
Methods to determine the ion cross field flow in a magnetized plasma are analyzed and a novel probe head for such measurements is proposed. First experimental results are discussed.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::28988b9030f4b2f00868aaa66538e724
https://doi.org/10.1002/ctpp.19980380124
https://doi.org/10.1002/ctpp.19980380124
Autor:
K. Höthker, Hitoshi Oyama, Wolfgang Bieger, Y. Shigueoka, H.-J. Belitz, Hiroshi Amemiya, K. Yano
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 63:484-488
Measurements of the ion and electron temperature and density in an electron cyclotron discharge by means of the rotatable double probe and an retarding field analyser are reported. A significant resonance absorption at the second harmonic is observed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc539a5b3c22bfc354b73c70c2b3b5e1
https://doi.org/10.1016/0168-583x(92)95222-d
https://doi.org/10.1016/0168-583x(92)95222-d
Autor:
B. Schweer, Y.T. Lie, P. Bogen, E. Hintz, D. Bora, D. Rusbüldt, U. Samm, H. Gerhauser, R.S. Ivanov, H. Hartwig, A. Pospieszczyk, H.A. Claassen, K. Höthker
Publikováno v:
Nuclear Fusion. 31:1386-1389
The transport inside the scrape-off layer (SOL) of a tokamak is analysed. In particular, poloidal asymmetries in electron density profiles measured in the presence of a toroidal limiter are compared with results obtained from a numerical twodimension
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8eb6339e8ba5e8e3397647d14ca12ea3
https://doi.org/10.1088/0029-5515/31/7/014
https://doi.org/10.1088/0029-5515/31/7/014
Publikováno v:
Review of Scientific Instruments. 61:114-120
The particle flow to a probe in a magnetized plasma is anisotropic. Because of this effect a probe pin generates a shadow in the plasma. From the measurement of the density profile of this shadow the ion temperature can be inferred for specified plas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::52b06465fa8f00629a603194ae257ddd
https://doi.org/10.1063/1.1141884
https://doi.org/10.1063/1.1141884
Autor:
K Höthker
Publikováno v:
Journal of Nuclear Materials. :839-841
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5164b4bb9c7c01814e4ad78e94203479
https://doi.org/10.1016/s0022-3115(96)00616-2
https://doi.org/10.1016/s0022-3115(96)00616-2
Autor:
A. Pospieszczyk, B. Schweer, W. Bieger, K. Höthker, G. Van Oost, R.R. Weynants, M. Brix, R.P. Schorn
Publikováno v:
Journal of Nuclear Materials. :839-841
The ions in the edge plasma in front of the limiter ALT II in Ohmic discharges of TEXTOR are in the banana/plateau regime. The qualitative dependencies of the ion speed parallel to the magnetic field are the same as those expected from neoclassical t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c46b2307882b09803065e6e584ba328c
https://doi.org/10.1016/s0022-3115(97)80150-x
https://doi.org/10.1016/s0022-3115(97)80150-x
Publikováno v:
Journal of Nuclear Materials. :157-162
First measurements on the TEXTOR boundary layer are reported. The hydrogen recycling in front of the four limiter segments has been studied by means of a CCD-camera, which proved to be a good instrument to center the discharge for symmetric plasma-li
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::36c0f26e49db67a1e5c4b4f1f5f0b3c0
https://doi.org/10.1016/0022-3115(84)90344-1
https://doi.org/10.1016/0022-3115(84)90344-1
Autor:
Y.T. Lie, O. Mitarai, U. Samm, A. Komori, A. Pospieszczyk, C. Honda, P. Bogen, J. Fujita, E. Hintz, K. Yamagiwa, K. Höthker, K. Kadota
Publikováno v:
Nuclear Fusion. 28:1460-1465
Density fluctuations in the outer edge of the plasma, behind the limiter, have been investigated in the TEXTOR tokamak by a new technique using a probing beam of thermal neutral lithium. With this method, radial profiles of the electron density and i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7fecc1e5cdf77c74ef4f6a920f0a339
https://doi.org/10.1088/0029-5515/28/8/014
https://doi.org/10.1088/0029-5515/28/8/014
Publikováno v:
Journal of Nuclear Materials. :785-790
We demonstrate experimentally for plasmas without a static magnetic field: (a) the existence of purely plasma-induced arcs (unipolar arcs), and (b) the existence of thresholds for the electron temperature and for the arc current which sustain plasma-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3cdd3dc6719a04793990dcc98487a236
https://doi.org/10.1016/0022-3115(80)90208-1
https://doi.org/10.1016/0022-3115(80)90208-1
Autor:
U. Samm, B. Schweer, E. Hintz, P. Bogen, H. Hartwig, Y.J. Yu, A. Pospieszczyk, D. Rusbüldt, K. Höthker, Y.T. Lie
Publikováno v:
Journal of Nuclear Materials. :24-37
Investigations of the plasma edge in TEXTOR are presented on the one hand by comparing results obtained with poloidal and toroidal limiters and on the other hand by discussing general problems of plasma edge physics which are independent of the limit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7891f0ae9405a38e0a038bac8c484421
https://doi.org/10.1016/0022-3115(89)90255-9
https://doi.org/10.1016/0022-3115(89)90255-9