Effect of the parameters of the plasma channel produced by a high-current relativistic electron beam in dense gaseous media on the beam transportation stability |
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Authors: | N A Kondrat’ev V I Smetanin |
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Institution: | (1) Research Institute of Nuclear Physcs, Tomsk Polytechnic University, Tomsk, 634050, Russia |
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Abstract: | Results are presented from experimental studies of the time evolution of the plasma channel produced by a high-current electron
beam (with an electron energy of E
e
= 1.1 MeV, a beam current of I
b = 24 kA, and a pulse duration of t = 60 ns) in helium, nitrogen, neon, air, argon, krypton, xenon, and humid air (air: H2O) at pressures from 1 to 760 Torr. It is shown that, in gases characterized by a small ratio of the collision frequency to
the gas ionization rate u
i
, the electron beam produces a broad high-conductivity plasma channel, such that R
b/R
p < 1, where R
b and R
p are the beam and channel radii, respectively. As a result, large-scale resistive hose instability is suppressed. |
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Keywords: | |
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