Abstract
Two magnetically insulated gas-puff diodes were tested. In one design the plasma source was a fast inductive coil; in the other a coaxial gun created the plasma. The plasma current density from both sources, as well as the accelerated beam from each, was comparable to the Child–Langmuir limit of ∼10 A/cm2.
Highlights
We attempted to build a plasma injector capable of producing a neutralized beam of helium ions with a current density of 100 A/cm*
Plasma production was optimized for a gas valve preionizer delay of 100,us and for a preionizer-breakdown coil delay of 1.3 ps
Plasma production was similar for hydrogen and helium
Summary
We attempted to build a plasma injector capable of producing a neutralized beam of helium ions with a current density of 100 A/cm*. The original intent was to inject alpha particles into a tokamak.’. Beams of this intensity have been reported for hydrogen and other gases213but not helium, which is expected to be more difficult due to its high ionization potential. Two approaches were tried; the maximum current density achieved was ~20 A/cm
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
