Identification of the Alfvén wave resonances in the TCABR tokamak by the microwave reflectometry
Autor(a) principal: | |
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Data de Publicação: | 2004 |
Outros Autores: | , , , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian Journal of Physics |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332004000800037 |
Resumo: | The experimental results on the Alfvén mode structure identification by the microwave reflectometry in TCABR tokamak are presented. The knowledge of the spatial spectrum of the excited waves is crucial for optimization of Alfvén wave plasma heating and noninductive current drive scenarios in tokamak plasmas. No less important is the possibility to use the Alfvén wave excitation for diagnostic purposes. A microwave reflectometer with fixed frequency was used to register plasma density oscillations driven by the excited Alfvén waves, under the condition of the spectrum scanned by a controlled plasma density rise. It is shown that when the position of the local Alfvén resonance, rA, which is defined by relation omega = k||(rA)C A(rA), is close to the plasma zone where the microwave signal is reflected, the high-frequency modulation of the output signal of the reflectometer at the RF generator frequency increases. The possibility to use the observed effect for finding the plasma current profile in tokamaks is discussed. |
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Brazilian Journal of Physics |
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Identification of the Alfvén wave resonances in the TCABR tokamak by the microwave reflectometryThe experimental results on the Alfvén mode structure identification by the microwave reflectometry in TCABR tokamak are presented. The knowledge of the spatial spectrum of the excited waves is crucial for optimization of Alfvén wave plasma heating and noninductive current drive scenarios in tokamak plasmas. No less important is the possibility to use the Alfvén wave excitation for diagnostic purposes. A microwave reflectometer with fixed frequency was used to register plasma density oscillations driven by the excited Alfvén waves, under the condition of the spectrum scanned by a controlled plasma density rise. It is shown that when the position of the local Alfvén resonance, rA, which is defined by relation omega = k||(rA)C A(rA), is close to the plasma zone where the microwave signal is reflected, the high-frequency modulation of the output signal of the reflectometer at the RF generator frequency increases. The possibility to use the observed effect for finding the plasma current profile in tokamaks is discussed.Sociedade Brasileira de Física2004-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332004000800037Brazilian Journal of Physics v.34 n.4b 2004reponame:Brazilian Journal of Physicsinstname:Sociedade Brasileira de Física (SBF)instacron:SBF10.1590/S0103-97332004000800037info:eu-repo/semantics/openAccessRuchko,L. F.Galvão,R. M. O.Lerche,E. A.Elfimov,A. G.Bellintani Jr,V.Elizondo,J. I.Fagundes,A. N.Fonseca,A. M. M.Kuznetsov,Yu. K.Nascimento,I. C.Sá,W. P. deSanada,E.Silva,R. P. daValencia,R.eng2005-03-01T00:00:00Zoai:scielo:S0103-97332004000800037Revistahttp://www.sbfisica.org.br/v1/home/index.php/pt/ONGhttps://old.scielo.br/oai/scielo-oai.phpsbfisica@sbfisica.org.br||sbfisica@sbfisica.org.br1678-44480103-9733opendoar:2005-03-01T00:00Brazilian Journal of Physics - Sociedade Brasileira de Física (SBF)false |
dc.title.none.fl_str_mv |
Identification of the Alfvén wave resonances in the TCABR tokamak by the microwave reflectometry |
title |
Identification of the Alfvén wave resonances in the TCABR tokamak by the microwave reflectometry |
spellingShingle |
Identification of the Alfvén wave resonances in the TCABR tokamak by the microwave reflectometry Ruchko,L. F. |
title_short |
Identification of the Alfvén wave resonances in the TCABR tokamak by the microwave reflectometry |
title_full |
Identification of the Alfvén wave resonances in the TCABR tokamak by the microwave reflectometry |
title_fullStr |
Identification of the Alfvén wave resonances in the TCABR tokamak by the microwave reflectometry |
title_full_unstemmed |
Identification of the Alfvén wave resonances in the TCABR tokamak by the microwave reflectometry |
title_sort |
Identification of the Alfvén wave resonances in the TCABR tokamak by the microwave reflectometry |
author |
Ruchko,L. F. |
author_facet |
Ruchko,L. F. Galvão,R. M. O. Lerche,E. A. Elfimov,A. G. Bellintani Jr,V. Elizondo,J. I. Fagundes,A. N. Fonseca,A. M. M. Kuznetsov,Yu. K. Nascimento,I. C. Sá,W. P. de Sanada,E. Silva,R. P. da Valencia,R. |
author_role |
author |
author2 |
Galvão,R. M. O. Lerche,E. A. Elfimov,A. G. Bellintani Jr,V. Elizondo,J. I. Fagundes,A. N. Fonseca,A. M. M. Kuznetsov,Yu. K. Nascimento,I. C. Sá,W. P. de Sanada,E. Silva,R. P. da Valencia,R. |
author2_role |
author author author author author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Ruchko,L. F. Galvão,R. M. O. Lerche,E. A. Elfimov,A. G. Bellintani Jr,V. Elizondo,J. I. Fagundes,A. N. Fonseca,A. M. M. Kuznetsov,Yu. K. Nascimento,I. C. Sá,W. P. de Sanada,E. Silva,R. P. da Valencia,R. |
description |
The experimental results on the Alfvén mode structure identification by the microwave reflectometry in TCABR tokamak are presented. The knowledge of the spatial spectrum of the excited waves is crucial for optimization of Alfvén wave plasma heating and noninductive current drive scenarios in tokamak plasmas. No less important is the possibility to use the Alfvén wave excitation for diagnostic purposes. A microwave reflectometer with fixed frequency was used to register plasma density oscillations driven by the excited Alfvén waves, under the condition of the spectrum scanned by a controlled plasma density rise. It is shown that when the position of the local Alfvén resonance, rA, which is defined by relation omega = k||(rA)C A(rA), is close to the plasma zone where the microwave signal is reflected, the high-frequency modulation of the output signal of the reflectometer at the RF generator frequency increases. The possibility to use the observed effect for finding the plasma current profile in tokamaks is discussed. |
publishDate |
2004 |
dc.date.none.fl_str_mv |
2004-12-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332004000800037 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332004000800037 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-97332004000800037 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Física |
publisher.none.fl_str_mv |
Sociedade Brasileira de Física |
dc.source.none.fl_str_mv |
Brazilian Journal of Physics v.34 n.4b 2004 reponame:Brazilian Journal of Physics instname:Sociedade Brasileira de Física (SBF) instacron:SBF |
instname_str |
Sociedade Brasileira de Física (SBF) |
instacron_str |
SBF |
institution |
SBF |
reponame_str |
Brazilian Journal of Physics |
collection |
Brazilian Journal of Physics |
repository.name.fl_str_mv |
Brazilian Journal of Physics - Sociedade Brasileira de Física (SBF) |
repository.mail.fl_str_mv |
sbfisica@sbfisica.org.br||sbfisica@sbfisica.org.br |
_version_ |
1754734861629784064 |