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Stenflo, Lennart
Alternative names
Publications (10 of 57) Show all publications
Brodin, G., Stenflo, L. & Juul Rasmussen, J. (2017). Focus issue to honour Hans L Pecseli on his 70th birthday. Physica Scripta, 92(1), Article ID 010301.
Open this publication in new window or tab >>Focus issue to honour Hans L Pecseli on his 70th birthday
2017 (English)In: Physica Scripta, ISSN 0031-8949, E-ISSN 1402-4896, Vol. 92, no 1, article id 010301Article in journal, Editorial material (Other academic) Published
Place, publisher, year, edition, pages
Institute of Physics Publishing (IOPP), 2017
National Category
Physical Sciences
Identifiers
urn:nbn:se:umu:diva-130076 (URN)10.1088/0031-8949/92/1/010301 (DOI)000389326000001 ()
Available from: 2017-01-13 Created: 2017-01-11 Last updated: 2018-06-09Bibliographically approved
Karimov, A. R., Shatokhin, V. L., Yu, M. Y. & Stenflo, L. (2016). The processes of nonequilibrium exchange in rotating plasma flows. In: II CONFERENCE ON PLASMA & LASER RESEARCH AND TECHNOLOGIES: . Paper presented at 2nd Conference on Plasma and Laser Research and Technologies, JAN 25-27, 2016, Natl Res Nucl Univ MEPhI, Moscow, RUSSIA. , 747, Article ID 012077.
Open this publication in new window or tab >>The processes of nonequilibrium exchange in rotating plasma flows
2016 (English)In: II CONFERENCE ON PLASMA & LASER RESEARCH AND TECHNOLOGIES, 2016, Vol. 747, article id 012077Conference paper, Published paper (Refereed)
Abstract [en]

The mechanisms of energy/momentum exchange in rotating and compressing plasma flows have been discussed. It has been shown that such flows are capable of transforming the energy of different degrees of freedom into the energy of one degree owing to the interaction of the coupled nonlinear radial, axial and azimuthal electron-ion oscillations. These processes may lead to the additional acceleration of the flow in azimuthal or axial direction so they might be instrumental for the creation of space thrusters employing pulse transformations for propulsion.
Series
Journal of Physics Conference Series, ISSN 1742-6588 ; 747
National Category
Fusion, Plasma and Space Physics Other Physics Topics
Identifiers
urn:nbn:se:umu:diva-130013 (URN)10.1088/1742-6596/747/1/012077 (DOI)000387066400077 ()2-s2.0-84992153656 (Scopus ID)
Conference
2nd Conference on Plasma and Laser Research and Technologies, JAN 25-27, 2016, Natl Res Nucl Univ MEPhI, Moscow, RUSSIA
Available from: 2017-01-11 Created: 2017-01-11 Last updated: 2023-03-24Bibliographically approved
Karimov, A. R., Yu, M. Y. & Stenflo, L. (2014). Expansion of a cold non-neutral plasma slab. Physics of Plasmas, 21(12), Article ID 122304.
Open this publication in new window or tab >>Expansion of a cold non-neutral plasma slab
2014 (English)In: Physics of Plasmas, ISSN 1070-664X, E-ISSN 1089-7674, Vol. 21, no 12, article id 122304Article in journal (Refereed) Published
Abstract [en]

Expansion of the ion and electron fronts of a cold non-neutral plasma slab with a quasi-neutral core bounded by layers containing only ions is investigated analytically and exact solutions are obtained. It is found that on average, the plasma expansion time scales linearly with the initial inverse ion plasma frequency as well as the degree of charge imbalance, and no expansion occurs if the cold plasma slab is stationary and overall neutral. However, in both cases, there can exist prominent oscillations on the electron front. 
National Category
Fusion, Plasma and Space Physics
Identifiers
urn:nbn:se:umu:diva-104153 (URN)10.1063/1.4903879 (DOI)000347162700029 ()2-s2.0-84918497226 (Scopus ID)
Available from: 2015-06-17 Created: 2015-06-08 Last updated: 2023-03-24Bibliographically approved
Brodin, G. & Stenflo, L. (2014). Wave Generation in a Warm Magnetized Multi-Component Plasma. Contributions to Plasma Physics, 54(7), 623-625
Open this publication in new window or tab >>Wave Generation in a Warm Magnetized Multi-Component Plasma
2014 (English)In: Contributions to Plasma Physics, ISSN 0863-1042, E-ISSN 1521-3986, Vol. 54, no 7, p. 623-625Article in journal (Refereed) Published
Abstract [en]

The resonant interaction between three waves propagating perpendicularly to an external magnetic field in a plasma is considered. We present the explicit expressions for the three wave coupling coefficients of a warm multi-component plasma. The results of previous work on the generation of THz radiation by laser plasma interaction are significantly improved. (C) 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Keywords
Parametric instabilities, THz radiation
National Category
Fusion, Plasma and Space Physics
Identifiers
urn:nbn:se:umu:diva-93226 (URN)10.1002/ctpp.201300054 (DOI)000340499400001 ()2-s2.0-84905215349 (Scopus ID)
Available from: 2014-12-22 Created: 2014-09-15 Last updated: 2023-03-23Bibliographically approved
Brodin, G. & Stenflo, L. (2013). Stimulated Brillouin scattering in magnetized plasmas. Journal of Plasma Physics, 79(Special Issue 06), 983-986
Open this publication in new window or tab >>Stimulated Brillouin scattering in magnetized plasmas
2013 (English)In: Journal of Plasma Physics, ISSN 0022-3778, E-ISSN 1469-7807, Vol. 79, no Special Issue 06, p. 983-986Article in journal (Refereed) Published
Abstract [en]

Previous theory for stimulated Brillouin scattering is reconsidered and generalized. We introduce an effective ion sound velocity that turns out to be useful in describing scattering instabilities.
Place, publisher, year, edition, pages
Cambridge University Press, 2013
National Category
Fusion, Plasma and Space Physics
Identifiers
urn:nbn:se:umu:diva-86626 (URN)10.1017/S0022377813000664 (DOI)000330469800002 ()2-s2.0-84891878967 (Scopus ID)
Note

Special Issue 06 in memory of Professor Padma Kant Shukla (1950-2013).

Available from: 2014-04-24 Created: 2014-03-03 Last updated: 2023-03-24Bibliographically approved
Stenflo, L. (2012). Minnen från Sovjetunionen. Umeå: Gert Brodin, redaktör
Open this publication in new window or tab >>Minnen från Sovjetunionen
2012 (Swedish)Book (Other (popular science, discussion, etc.))
Place, publisher, year, edition, pages
Umeå: Gert Brodin, redaktör, 2012. p. 52
National Category
Social Sciences
Identifiers
urn:nbn:se:umu:diva-64706 (URN)978-91-7459-559-8 (ISBN)
Available from: 2013-02-01 Created: 2013-02-01 Last updated: 2018-06-08Bibliographically approved
Stenflo, L. (2012). Övervakad av KGB. In: Kungl. Skytteanska samfundets årsbok. 2012: (pp. 45-51). umeå: Kungl. Skytteanska Samfundet, 25
Open this publication in new window or tab >>Övervakad av KGB
2012 (Swedish)In: Kungl. Skytteanska samfundets årsbok. 2012, umeå: Kungl. Skytteanska Samfundet , 2012, Vol. 25, p. 45-51Chapter in book (Other (popular science, discussion, etc.))
Place, publisher, year, edition, pages
umeå: Kungl. Skytteanska Samfundet, 2012
Series
Thule: norrländsk kulturtidskrift, ISSN 0280-8692
National Category
Social Sciences
Identifiers
urn:nbn:se:umu:diva-64139 (URN)978-91-86438-42-5 (ISBN)
Note

[årg. 25]

Available from: 2013-01-16 Created: 2013-01-16 Last updated: 2019-03-01Bibliographically approved
Stenflo, L. & Brodin, G. (2011). Comment on "Terahertz wave generation by the upper hybrid wave". Physics of Plasmas, 18, 074701
Open this publication in new window or tab >>Comment on "Terahertz wave generation by the upper hybrid wave"
2011 (English)In: Physics of Plasmas, ISSN 1070-664X, E-ISSN 1089-7674, Vol. 18, p. 074701-Article in journal (Refereed) Published
Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2011
National Category
Physical Sciences
Research subject
Physics
Identifiers
urn:nbn:se:umu:diva-50778 (URN)10.1063/1.3601361 (DOI)2-s2.0-79961132101 (Scopus ID)
Available from: 2011-12-21 Created: 2011-12-21 Last updated: 2023-03-23Bibliographically approved
Karimov, A., Yu, M. & Stenflo, L. (2011). Flow oscillations in radial expansion of an inhomogeneous plasma layer. Physics Letters A, 375(27), 2629-2636
Open this publication in new window or tab >>Flow oscillations in radial expansion of an inhomogeneous plasma layer
2011 (English)In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 375, no 27, p. 2629-2636Article in journal (Refereed) Published
Abstract [en]

The cylindrically symmetric radial evolution of an inhomogeneous plasma layer expanding into vacuum is investigated nonperturbatively by first determining the spatial structure of the plasma flow structure. The evolution is then governed by a set of ordinary differential equations. The effect of the plasma inhomogeneity on the nonlinear coupling among the electron and ion flow components and oscillations is investigated
Keywords
Plasma-layer expansion; Nonperturbative analysis; Nonneutrality
National Category
Physical Sciences
Research subject
Physics
Identifiers
urn:nbn:se:umu:diva-50787 (URN)10.1016/j.physleta.2011.05.053 (DOI)2-s2.0-79958862560 (Scopus ID)
Available from: 2011-12-21 Created: 2011-12-21 Last updated: 2023-03-23Bibliographically approved
Stenflo, L. (2011). Minnen från min tid som gästforskare i Sovjetunionen. Thule: norrländsk kulturtidskrift
Open this publication in new window or tab >>Minnen från min tid som gästforskare i Sovjetunionen
2011 (Swedish)In: Thule: norrländsk kulturtidskrift, ISSN 0280-8692Article in journal (Other (popular science, discussion, etc.)) Published
Place, publisher, year, edition, pages
Umeå: Två förläggare och Kungl. Skytteanska samfundet, 2011
National Category
Social Sciences
Identifiers
urn:nbn:se:umu:diva-50542 (URN)
Available from: 2011-12-13 Created: 2011-12-13 Last updated: 2018-06-08Bibliographically approved
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