- Day 2, May 16（Thu.） 10:30-10:50 Room C (101)
Generation of a Cluster Ion Beam Containing Active Protons from a Sharpened Rod Wetted with an Ionic Liquid: On the Basis of Liquid Metal Ion Sources for Focused Ion Beam (FIB)
Emission of cluster ions from a sharped rod wetted with liquid, which is an important phenomenon in liquid metal ion sources, was investigated using a protic ionic liquid. A stable cluster ion beam was generated from a tip of a sharpened rod wetted with propylammonium nitrate ([C3H7NH3][NO3]). The cluster ion beam contained massive cluster ions exceeding m/z 5000. In addition, the cluster ion beam was tested as a primary ion beam in secondary ion mass spectrometry (SIMS). The cluster ion beam proved to be useful for enhancing molecular ionization of organic materials.