Yield measurement of secondary particles from liquid surface under heavy ion bombardment

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We have studied in order to measure absolute yields of secondary particles from various surface including liquid material. At first we have measured size distributions of extracted ion beam using glass capillary. As a result, we have found the 'halo' components in size distributions via glass capillary. In order to obtain an ion beam without 'halo' components, we have developed an extraction technique of ion beam using an metal capillary and an in-air-material analysis technique with this capillary.