Status of a mega-joule scale Plasma-Focus experiments

• Autorzy: Scholz M. , Bieńkowska B. , Borowiecki M. , Ivanova-Stanik I. , Karpiński L. , Stępniewski W. , Paduch M. , Tomaszewski K. , Sadowski M. , Szydłowski A. , Kubeš P. , Kravárik J.
• Konferencja: Proceedings of the 2nd IAEA Research Co-ordination Meeting of the Co-ordinated Research Project on Dense Magnetized Plasma 1-3 June 2005, Kudowa Zdrój, Poland
• Języki publikacji: EN

Abstrakty

EN

This paper presents results of the recent plasma-focus (PF) experiments carried out with PF facilities, which was operated at energies ranging from 0.5 MJ to about 1 MJ. Particular attention has been paid to pinch evolution, the emission of pulsed X-ray, fast electron beams, and fusion produced neutrons. Some theoretical models of the initial breakdown, which occurs at the insulator surface, are compared. It is pointed out that modeling of the breakdown is sensitive to kinetics of ionization processes and transport coefficients. Progress in experimental studies of the axial acceleration phase is unsatisfactory. Important experimental data have been collected, but new measurements are still needed. For the radial collapse phase, it was shown that the MHD modeling is efficient until the maximum compression, but plasma instabilities require more sophisticated approaches. The pinch phase was investigated by means of different diagnostics. Fusion neutron yields were measured in different experiments, but some discrepancies in scaling must still be explained. The conclusions concern directions for further studies and optimization of large-scale high-current PF facilities.

Słowa kluczowe

EN

plasma focus; dense magnetized plasma; neutron yield

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2006
• Tom: Vol. 51, nr 1
• Strony: 79--84
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Scholz M.

autor

Bieńkowska B.

autor

Borowiecki M.

autor

Ivanova-Stanik I.

autor

Karpiński L.

autor

Stępniewski W.

autor

Paduch M.

autor

Tomaszewski K.

autor

Sadowski M.

autor

Szydłowski A.

autor

Kubeš P.

autor

Kravárik J.

• Institute of Plasma Physics and Laser Microfusion, 23 Hery Str., 00-908 Warsaw, P.O. Box 49, Poland, Tel.: [phone], Fax: [phone],

Bibliografia

• 1. Herold H, Jerzykiewicz A, Sadowski MJ, Schmidt H (1989) Comparative analysis of large Plasma Focus experiments performed at IPF, Stuttgart, and at IPJ,Swierk. Nucl Fusion 29:1255−1269
• 2. Kasperczuk A, Kumar A, Miklaszewski R et al. (2002)Study of the plasma evolution in the PF-1000 device by means of optical diagnostics. Phys Scripta 65:96−102
• 3. Sadowski MJ, Scholz M (2002) Results of large scale Plasma Focus experiments and prospects for neutron yield optimization. Nukleonika 47;1:31−37
• 4. Schmidt H, Kasperczuk A, Paduch M et al. (2002) Review of recent experiments with the mega-joule PF-1000 plasma focus device. Phys Scripta 66:168−172
• 5. Scholz M, Ivanova-Stanik I (2002) Breakdown phenomena in plasma focus device. Czechoslovak J Phys 52;Suppl D:D107−D111
• 6. Scholz M, Miklaszewski R, Paduch M, Sadowski MJ,Szydłowski A, Tomaszewski K (2002) Preliminary neutron experiments with the PF-1000 Plasma Focus facility. IEEE Trans Plasma Sci 30;2:476−481
• 7. Stępniewski W (2004) MHD numerical modelling of the plasma focus phenomena. Vacuum 76:51−55