Performance Characterization of a Solenoid-type Gas Valve for the $H^{-}$ Magnetron Source at FNAL

摘要

The magnetron-style $H^{-}$ ion sources currently in operation at Fermilabuse piezoelectric gas valves to function. This kind of gas valve is sensitiveto small changes in ambient temperature, which affect the stability andperformance of the ion source. This motivates the need to find an alternativeway of feeding H2 gas into the source. A solenoid-type gas valve has beencharacterized in a dedicated off-line test stand to assess the feasibility ofits use in the operational ion sources. $H^{-}$ ion beams have been extractedat 35 keV using this valve. In this study, the performance of the solenoid gasvalve has been characterized measuring the beam current output of the magnetronsource with respect to the voltage and pulse width of the signal applied to thegas valve.