Measurements and Simulations of Spatial Distribution Change of Ions Surrounding an Alpha Source With Temperature, Humidity and Airflow Using a Position-Sensitive Micro-Ionization Chamber

A new alpha radioactivity measurement technique has been developed, which measures alpha radioactivity by ions created by alpha particles. In order to optimize this technique, a better understanding of ion's distributions surrounding an alpha source is required. For this purpose, we have developed a position-sensitive micro-ionization chamber with multichannel charge-integrating application specific integrated circuits (ASICs) and obtained experimental results and simulation results of ion's distributions. In this paper, we continue to study ion's distribution changes with temperature, humidity, and airflow using the position-sensitive micro-ionization chamber and show their experimental results and simulation results