Pressure limits of negative ion sources based upon gas efficiency and extracted ion-current density
Description:
The nature of the electrical discharge has an obvious impact upon the gas efficiency of an ion source and on the current density whch can be drawn from it. However external factors, such as the conductance of the grids and the background pressure along the beamline, also have an effect. Simple approximations based upon these factors show that there is a lower limit to the pressure of an ion source, which can deliver an ion beam of given current density at a specific gas efficiency. Estimates of…
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Date:
March 10, 1982
Creator:
Fink, J.
Item Type:
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Partner:
UNT Libraries Government Documents Department