Enhancement of extracted H− current by streaming neutral gas injection

Local Neutral Density Enhancement by Streaming Neutral Gas Injection

“…7) Also, based on the agreement of the simulation with the experimental results, proper design of a streaming neutral gas injector for other geometries of H À sources can be achieved, simply by employing the DSMC calculations.…”

“…The results from the simulation and the experiment shows that the pressure enhancement factor produced by the SNGI can explain the electron temperature decrease and electron density increase observed in our previous work. 7) Also, based on the agreement of the simulation with the experimental results, proper design of a streaming neutral gas injector for other geometries of H À sources can be achieved, simply by employing the DSMC calculations.…”

“…5,6) In a previous paper, a new technique called streaming neutral gas injection (SNGI) was introduced as an alternative method for enhancing negative ion density in a plasma. 7) This method was observed to be effective in electron temperature cooling while enhancing the electron density of a dilute plasma. The SNGI method can realize this by injecting a highly directional flow of neutral hydrogen gas near the extraction aperture of a negative ion source to create a region of localized high neutral density which directly results in an increase in the electron-neutral collision rate.…”