Influence of grid control on beam quality in laser ion source generating high-current low-charged copper ions
Description:
We examined grid-controlled extraction for a laser ion source using a KrF laser. By using grid-controlled extraction in the over-dense regime, we found that the ion beam current waveforms were stabilized more significantly as the grid bias raised from -90 V to -280 V. The normalized emittance of 0.08 {pi}mm-mrad measured without the grid control was improved to 0.06 {pi}mm-mrad with the grid control. In contrast to this observation, the grid bias disturbed the pattern of the beam extracted in t…
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Date:
August 1, 2003
Creator:
Hasegawa, J.; Yoshida, M.; Ogawa, M.; Oguri, Y.; Nakajima, M.; Horioka, K. et al.
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