Spectroscopic investigations of the plasma behavior in high power diodes

Y. Maron, E. Sarid, L. Perelmutter, M. E. Foord, M. Sarfaty, O. Zahavi, E. Nahshoni

Research output: Contribution to conferencePaperpeer-review


Spectroscopic methods have been developed to determine the plasma properties in pulsed power systems. Using systems of high spectral resolution, the line Doppler broadening and shift yield the velocity distributions and the directed velocity of particles in the anode plasma. The neutral temperature is about 8 eV and the ion temperature is 20-80 eV, the ions being much hotter than the electrons (Te approximately 7 eV). Te and the absolute particle fluxes from the anode surface into the plasma of various species and charge states are determined. The magnetic field penetration into the plasma is consistent with a plasma conductivity about 10 times lower than classical. This conductivity explains the fast plasma expansion against the magnetic field and the absence of Te gradients in the plasma. The ohmic electron heating due to the pressure-driven currents in the plasma and the anomalous conductivity, together with the heating due to elastic collisions with the hotter ions, balance the electron cooling due to inelastic collisions.

Original languageEnglish
Number of pages2
StatePublished - 1 Dec 1988
Externally publishedYes
EventIEEE International Conference on Plasma Science - 1988 - Seattle, WA, USA
Duration: 6 Jun 19888 Jun 1988


ConferenceIEEE International Conference on Plasma Science - 1988
CitySeattle, WA, USA

ASJC Scopus subject areas

  • General Engineering


Dive into the research topics of 'Spectroscopic investigations of the plasma behavior in high power diodes'. Together they form a unique fingerprint.

Cite this