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Energy spread of the laser photoionized neodymium ions were measured by retarding-potential method. The obtained energy spread derived from the derivative ion charge ratio spectra corresponded to the potential of the laser photoionized region between ion extraction electrodes. Ion beam with the central ion energy between 300 and 1400eV were then produced, and their lateral intensity distributions...
In order to effectively extract and collect photoionized ions generated by the laser irradiation of atomic beam, five sets of semicylindrical electrode pair were added to the ion extractor, and the obtained ion intensity distributions were measured by scanning multichannel Faraday cups. By applying potential difference between the additional electrodes up to about 1300V for ion collection, the laterally...
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