Meteorological Effect on the “Scaler Mode” Counts of ARGO-YBJ Experiment

Key words: 
• secondary cosmic ray count /
• meteorological effect /
• partial correlation coefficient

Abstract: The Meteorological effects on “Scaler mode” secondary cosmic ray counts were discussed for the Sino\|Italian cooperated experiment ARGO\|YBJ in the Tibet Autonomous Region of China. The partial correlation coefficients were calculated between the counts and some environmental variables, such as the atmospheric air pressure, the temperature outside and inside the experimental hall, the atmospheric electric field and the humidity inside the hall. The results showed that there was a strong negative correlation between the counting rate of secondary cosmic ray and the atmospheric air pressure, and a moderate correlation was seen between the counts and the temperature outside of the hall. On the other hand, the atmospheric electric field had no correlation with the counts. The temperature inside the hall had an important influence on the secondary cosmic ray counts at low multiplicity (n=1) and the humidity inside the hall also had some influence. The larger the multiplicity, the less was the importance of the temperature and the humidity inside the hall. The data
of “Scaler mode” counts has been corrected by taking into account its linear correlation with the multiple meteorological parameters. This correction was reliable and important for further physics analysis.