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Leopoldo Soto Norambuena

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Chilean physicist
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In this Spanish name, the first or paternal surname is Soto and the second or maternal family name is Norambuena.
Leopoldo Soto Norambuena
BornChile
NationalityChilean
Alma materPontificia Universidad Católica de Chile
Known forDense plasma focus
Scientific career
FieldsPhysics
Doctoral advisorHernán Chuaqui

Leopoldo Soto Norambuena (born October 14, 1964), who publishes as Leopoldo Soto, is a Chilean physicist. He works at the Comisión Chilena de Energía Nuclear, where he founded the Plasma Physics and Nuclear Fusion Laboratory. His main contributions are in experimental physics (plasma physics in particular).

The group that he created and leads works on miniaturizing dense plasma focus devices which can produce similar physics to that obtained in large devices which are only available in large laboratories around the world.

He received the B.S., M.S. and Ph.D. degrees in Physics in 1989, 1990 and 1993, respectively, from the Pontificia Universidad Católica de Chile. His Ph.D. thesis was advised by Hernán Chuaqui, and was the first to be granted by a Chilean University in experimental physics. The results of his thesis were published in the journal Physical Review Letters.

When he arrived at the Comisión Chilena de Energía Nuclear, he started to work in plasmas driven by small transient electrical discharges and small pulsed power devices: z-pinch, capillary discharges and plasma focus. His work has contributed to scaling plasma focuses for a wide range of energies and sizes, keeping the same value of ion density, magnetic field, plasma sheath velocity, Alfvén speed and the quantity of energy per particle. Therefore, fusion reactions are possible to be obtained in ultra-miniaturized devices (driven by generators of 0.1 Joules for example), as well as they are obtained in bigger devices (driven by generators of 1 megajoule). However, the stability of the plasma pinch highly depends on the size and energy of the device.

A rich plasma phenomenology it has been observed in the table-top plasma focus devices developed by Soto's group: filamentary structures, toroidal singularities, plasma bursts and plasma jets generations. In addition, possible applications are explored using these kind of small plasma devices: development of portable generator as non-radioactive sources of neutrons and x-rays for field applications, pulsed radiation applied to biological studies, plasma focus as neutron source for nuclear fusion-fission hybrid reactors, and the use of plasma focus devices as plasma accelerators for studies of materials under intense fusion-relevant pulses.

In 1999, he was awarded with a Presidential Chair in Science by the president of Chile. In 2007, he was elected as Fellow of the Institute of Physics, UK. He was the president of the Chilean Physical Society for 2 periods, from April 2003 to April 2008, and its secretary general from April 2013 to April 2015.

References

  1. ^ "PDI - Resultado de Búsqueda". investigadores.anid.cl. Retrieved 2024-05-06.
  2. Soto, Leopoldo (20 April 2005). "New Trends and Future Perspectives on Plasma Focus Research". Plasma Physics and Controlled Fusion. 47 (5A): A361 – A381. Bibcode:2005PPCF...47A.361S. doi:10.1088/0741-3335/47/5A/027. hdl:10533/176861.
  3. ^ Soto, Leopoldo; C. Pavez; A. Tarifeño; J. Moreno; F. Veloso (20 September 2010). "Studies on scalability and scaling laws for the plasma focus: similarities and differences in devices from 1MJ to 0.1J" (PDF). Plasma Sources Science and Technology. 19 (55001–055017): 055017. Bibcode:2010PSST...19e5017S. doi:10.1088/0963-0252/19/5/055017. S2CID 122162772. Archived from the original (PDF) on 9 February 2020.
  4. Soto, Leopoldo; H. Chuaqui; M. Favre; E. Wyndham (2 May 1994). "A Novel Gas Embedded Compressional Z-pinch Configuration". Physical Review Letters. 72 (18): 2891–2894. Bibcode:1994PhRvL..72.2891S. doi:10.1103/PhysRevLett.72.2891. PMID 10056011.
  5. Soto, Leopoldo; A. Esaulov; J. Moreno; P. Silva; G. Sylvester; M. Zambra; A. Nazarenko; A. Clausse (5 January 2001). "Transient Electrical Discharge in Small Devices". Physics of Plasmas. 8 (2572): 2572–2578. Bibcode:2001PhPl....8.2572S. doi:10.1063/1.1351829. hdl:11336/136317.
  6. Soto, Leopoldo Soto; Cristian Pavéz; José Moreno; Luis Altamirano; Luis Huerta; Mario Barbaglia; Alejandro Clausse; Roberto E. Mayer (July 2017). "Evidence of nuclear fusion neutrons in an extremely small plasma focus device operating at 0.1 Joules". Physics of Plasmas. 24 (8): 082703. Bibcode:2017PhPl...24h2703S. doi:10.1063/1.4989845. hdl:11336/67569.
  7. Soto, Leopoldo; C. Pavez; F. Castillo; F. Veloso; J. Moreno; S. K. H. Auluck (1 July 2014). "Filamentary structures in dense plasma focus: current filaments or vortex filaments". Physics of Plasmas. 21 (7): 072702. Bibcode:2014PhPl...21g2702S. doi:10.1063/1.4886135.
  8. Casanova, Federico; Ariel Tarifeño-Saldivia; Felipe Veloso; Cristian Pavez; Alejandro Clausse; Leopoldo Soto (6 September 2011). "Toroidal high-density singularities in a small Plasma Focus". Journal of Fusion Energy. 31 (3): 279–283. Bibcode:2012JFuE...31..279C. doi:10.1007/s10894-011-9469-1. S2CID 121105885.
  9. Soto, Leopoldo; C. Pavez; J. Moreno; M. J. Inestrosa-Izurieta; F. Veloso; G. Gutiérrez; J. Vergara; A. Clausse; H. Bruzzone; F. Castillo; L. F. Delgado-Aparicio (5 December 2014). "Characterization of the axial plasma shock in a table top plasma focus after the pinch and its possible application to testing materials for fusion reactors". Physics of Plasmas. 21 (12): 122703. Bibcode:2014PhPl...21l2703S. doi:10.1063/1.4903471. hdl:11336/180619.
  10. Paves, Cristian; J. Pedreros; A. Tarifeño Saldivia; L. Soto (24 April 2015). "Observations of plasma jets in a table top plasma focus discharge". Physics of Plasmas. 22 (4): 040705. Bibcode:2015PhPl...22d0705P. doi:10.1063/1.4919260.
  11. Soto, Leopoldo; P. Silva; J. Moreno; M. Zambra; W. Kies; R. E. Mayer; A. Clausse; L. Altamirano; C. Pavez; L. Huerta (1 October 2008). "Demonstration of neutron production in a table top pinch plasma focus device operated at only tens of joules". Journal of Physics D: Applied Physics. 41 (202001–205503): 205215. Bibcode:2008JPhD...41t5215S. doi:10.1088/0022-3727/41/20/205215. hdl:10533/141980.
  12. Pavez, Cristian; Leopoldo Soto (6 May 2010). "Demonstration of x-ray Emission from an ultraminiature pinch plasma focus discharge operating at 0.1 J. Nanofocus". IEEE Transactions on Plasma Science. 38 (5): 1132–1135. Bibcode:2010ITPS...38.1132P. doi:10.1109/TPS.2010.2045110. S2CID 30726899.
  13. Clausse, Alejandro; Leopoldo Soto; Carlos Friedli; Luis Altamirano (26 December 2014). "Feasibility study of a hybrid subcritical fission system driven by Plasma-Focus fusion neutrons". Annals of Nuclear Energy. 22: 10–14. doi:10.1016/j.anucene.2014.12.028. hdl:11336/33206.
  14. Inestrosa-Izurieta, Maria José; E. Ramos-Moore; L. Soto (5 August 2015). "Morphological and structural effects on tungsten targets produced by fusion plasma pulses from a table top plasma focus". Nuclear Fusion. 55 (93011): 093011. Bibcode:2015NucFu..55i3011I. doi:10.1088/0029-5515/55/9/093011.
  15. ^ "UMCE Board of DIRECTORS".
  16. ^ "Center for research and applications in plasma physics and pulsed power". www.pppp.cl. Retrieved 2024-05-06.
  17. "Científico Leopoldo Soto: "Es importante democratizar el conocimiento, la libertad termina donde empieza la ignorancia"". El Morrocotudo.cl , Noticias de Arica y Parinacota (in Spanish). Retrieved 2024-05-06.

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