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P01 · Fast Ion Transport Studies in the Large Plasma Device

Y. Zhang¹, H. Boehmer¹, W. Heidbrink¹, R. McWilliams¹, L. Zhao¹, B. Brugman², T. Carter², D. Leneman², S. Vincena<sup>2

1</sup>University of California, Irvine
²University of California, Los Angeles

Abstract: The LArge Plasma Device (LAPD) at UCLA is an 18-m long linear device that produces highly reproducible ~10-ms duration plasmas with n_e>10¹² cm^-3, Te>1 eV, and B~1 kG every second. Its large size and excellent diagnostic access accommodate detailed studies of fast-ion physics at reduced parameters. The first fast-ion experiments were conducted with a modified 100-1000 eV argon processing source that was inserted into the plasma. Measurements of energy deceleration and cross-field transport in the quiet “afterglow” plasma are in good agreement with classical Coulomb scattering theory. Recent experiments employ a 200-3000 eV lithium source. Deflection of the beam by shear Alfven waves is observed.

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