Characterization of electron beams generated in a high-voltage pulse-line-driven pseudospark discharge
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Date
1994-05-01Author
Ramaswamy, K.
Destler, William
Segalov, Z.
Rodgers, J.
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Show full item recordAbstract
Emittance and energy measurements have been performed on a high-brightness electron beam
(>1010Nm2 rad2
) with diameter in the range 1-3 mm and energy in the range 150-170 keY. This
electron beam is generated by the mating of a hollow-cathode discharge device operating in the
pseudospark regime to the output of a high-power pulse line accelerator. The measured effective
emittance lies in the range between 30 and 90 mm mrad and increases with axial distance. Electron
energy measurements indicate that the high-energy electrons are generated during the first 20-30 ns
of the discharge. Both the emittance and energy experiments were performed at two different
ambient argon gas pressures (92 and 152 mtorr). Beam expansion as a function of axial position has
also been studied and a lower bound on the beam brightness has been obtained.
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