10:15 AM - 10:30 AM
[PEM07-37] Laboratory experiment with heavy ion beam for verification of new particle formation by cosmic rays
The result so far showed that ion density in the chamber increased due to the heavy ion irradiation and enhancement of the number of aerosol particles due to its was confirmed. In this presentation, I will report the results of the heavy ion irradiation experiments. Heavy ion beam of nitrogen and xenon was used because their ionization loss is different by a factor of 60. The ionization loss could be an index representing the ability to ionize the air molecules that is, parameters that contribute to atmospheric ion generation. Since it is considered that the aerosol particle generation would be increased according to the amount of ions, the experiment was carried out for these ions. The results showed that produced ion density was not different for both ions with different ionization power, and aerosol particle production efficiency was almost the same. The less ionization density for Xe ions might be due to large recombination of produced ions along the ion beam tracks.