Abstract
Using still color photography with submillisecond time resolution, observations of impurities injected into the PLT tokamak by laser blowoff have been made. These clearly show the existence of atomic vapor and particulates with abundances depending on laser fluence, material, and film thickness. Velocity determinations for each component have been made: for atomic vapor v≂2×105 cm/s; and for particulates v≂5×104 cm/s. Their penetration depths into plasmas of different electron densities have also been measured. Models of penetration are compared with the data.
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