Measurement of the Plasma Width in a Ring Cusp
1980; American Physical Society; Volume: 45; Issue: 4 Linguagem: Inglês
10.1103/physrevlett.45.256
ISSN1092-0145
AutoresR. E. Pechacek, J. R. Greig, M. Raleigh, David W. Koopman, A. W. DeSilva,
Tópico(s)Atomic and Molecular Physics
ResumoA pure, fully ionized, ${\mathrm{D}}_{2}$ plasma of 2\ifmmode\times\else\texttimes\fi{}${10}^{19}$ ions, generated from free-falling ${\mathrm{D}}_{2}$ pellets with use of a 100-J Nd-glass laser pulse followed by a 1000-J C${\mathrm{O}}_{2}$ laser pulse, is used to fill ($\ensuremath{\beta}=1$) a cusp-configured magnetic field. The width of the plasma escaping through the ring cusp is determined by laser scattering, chamber wall light and chemical deposits, and plasma lifetime. The ring cusp is an ion gyroradius wide, in contrast to recent experiments that have indicated a considerably narrower cusp width.
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