Author/Authors :
Gilson، نويسنده , , E.P. and Davidson، نويسنده , , R.C. and Efthimion، نويسنده , , P.C. and Kaganovich، نويسنده , , I.D. and Kwan، نويسنده , , J.W. and Lidia، نويسنده , , S.M. and Ni، نويسنده , , P.A. and Roy، نويسنده , , P.K. and Seidl، نويسنده , , P.A. and Waldron، نويسنده , , W.L. and Barnard، نويسنده , , J.J. and Friedman، نويسنده , , A.، نويسنده ,
Abstract :
A barium titanate ferroelectric cylindrical plasma source has been developed, tested and delivered for the Neutralized Drift Compression Experiment NDCX-II at Lawrence Berkeley National Laboratory (LBNL). The plasma source design is based on the successful design of the NDCX-I plasma source. A 7 kV pulse applied across the 3.8 mm-thick ceramic cylinder wall produces a large polarization surface charge density that leads to breakdown and plasma formation. The plasma that fills the NDCX-II drift section upstream of the final-focusing solenoid has a plasma number density exceeding 1010 cm−3 and an electron temperature of several eV. The operating principle of the ferroelectric plasma source are reviewed and a detailed description of the installation plans is presented. The criteria for plasma sources with larger number density will be given, and concepts will be presented for plasma sources for driver applications. Plasma sources for drivers will need to be highly reliable, and operate at several Hz for millions of shots.
