Zobrazeno 1 - 10
of 73
pro vyhledávání: '"J.A.C. Cabral"'
Autor:
Ricardo Magnus Osorio Galvao, J.A.C. Cabral, C. F. A. Varandas, H. F. C. Figueiredo, I. S. Nedzelskiy, Carlos A. Silva
Publikováno v:
Czechoslovak Journal of Physics. 55:361-366
The correlation between the efficiency of plasma biasing and the position of a localized limiter has been investigated. It has been found that two distinct zones of limiter position can be distinguished in ISTTOK plasma: Far-zone at r lim > 7.2 cm, a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6b0c313904280514445fb4d1de83d844
https://doi.org/10.1007/s10582-005-0047-5
https://doi.org/10.1007/s10582-005-0047-5
Autor:
J.A.C. Cabral, C.A.F. Varandas, H. F. C. Figueiredo, I. S. Nedzelskiy, R.M.O. Galvão, Carlos A. Silva
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
Biasing experiments have been performed on the tokamak ISTTOK with both a moving limiter and an emissive electrode. We have observed that large currents (>15 A) can be drawn at negative applied voltage by both localized limiter and emissive electrode
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a2f470f0edd3baa8e33661d7a34489b7
https://doi.org/10.1016/j.jnucmat.2004.10.106
https://doi.org/10.1016/j.jnucmat.2004.10.106
Autor:
C.A.F. Varandas, I. Nedzelsky, B. Gonçalves, J.A.C. Cabral, G. Van Oost, Carlos A. Silva, H. F. C. Figueiredo
Publikováno v:
Plasma Physics and Controlled Fusion. 46:163-178
In this contribution, limiter and electrode biasing experiments are compared, in particular with regard to their effects on the edge plasma parameters. For a positive electrode bias (EB), the plasma potential profile is strongly modified in the regio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de06aea979bd5bbaf72f5d0c9ccb1c9e
https://doi.org/10.1088/0741-3335/46/1/010
https://doi.org/10.1088/0741-3335/46/1/010
Publikováno v:
Journal of Nuclear Materials. :1052-1055
Experimental results on minor and major disruption events in discharges with runaway electrons in the small tokamak ISTTOK and corresponding numerical analysis are presented. Using the experimental data from the soft X-ray diagnostic the image of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::73c01921a987aa348b34505fb244115e
https://doi.org/10.1016/s0022-3115(02)01536-2
https://doi.org/10.1016/s0022-3115(02)01536-2
Autor:
J. Stöckel, I. S. Nedzelskiy, Carlos A. Silva, C.A.F. Varandas, J.A.C. Cabral, H. F. C. Figueiredo
Publikováno v:
Czechoslovak Journal of Physics. 53:937-944
The influence of the polarization of a localized limiter on the global and edge parameters is described. In particular, the effect of varying the limiter position and the bias voltage is investigated. Improvement in confinement has been obtained for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e44190c00f0a172c708f563f091efdc1
https://doi.org/10.1023/a:1026300808534
https://doi.org/10.1023/a:1026300808534
Autor:
Ricardo Magnus Osorio Galvao, H Figueiredo, Horacio Fernandes, J.A.C. Cabral, C.A.F. Varandas
Publikováno v:
Scopus-Elsevier
The main engineering aspects of the tokamak ISTTOK operation in a multicycle alternating flat-top plasma current regime are presented. AC discharges have been obtained feeding the ohmic and vertical magnetic field circuits with a specially designed a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::86924273ddf22d95cd1d95ec9877fe48
https://doi.org/10.1016/s0920-3796(98)00263-4
https://doi.org/10.1016/s0920-3796(98)00263-4
Publikováno v:
Nuclear Fusion. 37:1575-1581
Operation of the tokamak ISTTOK in a multicycle alternating square wave plasma current regime is reported. Discharges with seven half-cycles without dwell times, over a total time span of about five times the maximum duration of a single DC discharge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9b45773a714b3790b94a18f9854041b3
https://doi.org/10.1088/0029-5515/37/11/i07
https://doi.org/10.1088/0029-5515/37/11/i07
Publikováno v:
Journal of Fusion Energy. 13:263-269
The Portuguese research program on nuclear fusion is presented. The experimental activity associated with the tokamak ISTTOK as well as the work carried out in the frame of international collaboration are summarized. Future plans are briefly describe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a29c03b2374e788b05b5fc789f3a2ca2
https://doi.org/10.1007/bf02215845
https://doi.org/10.1007/bf02215845
Publikováno v:
Brazilian Journal of Physics, Volume: 32, Issue: 1, Pages: 100-106, Published: MAR 2002
Brazilian Journal of Physics v.32 n.1 2002
Brazilian Journal of Physics
Sociedade Brasileira de Física (SBF)
instacron:SBF
Scopus-Elsevier
Brazilian Journal of Physics v.32 n.1 2002
Brazilian Journal of Physics
Sociedade Brasileira de Física (SBF)
instacron:SBF
Scopus-Elsevier
This paper describes the role of the tokamak ISTTOK on the development of the portuguese fusion research team, in the frame of the EURATOM Fusion Programme. Main tasks on education and training, control and data acquisition, diagnostics and tokamak p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1b07f5a6cca56a606d79cd373840569a
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332002000100019&lng=en&tlng=en
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332002000100019&lng=en&tlng=en
Publikováno v:
Czechoslovak Journal of Physics; Oct2003, Vol. 53 Issue 10, p937-944, 8p