CPC H05H 3/06 (2013.01) | 14 Claims |
1. A system, comprising:
a charge exchange device having an inlet, a lumen fillable with a gas adapted to convert an incoming negative particle beam to a positive particle beam, and an outlet; and
an aperture structure located in close proximity with the inlet, wherein the aperture structure has an annular shape with an inner aperture sized to permit passage of the incoming negative particle beam when in an aligned state, and wherein the aperture structure is configured to at least partially shield the charge exchange device when the incoming negative particle beam is in a misaligned state.
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