3:30 PM - 5:00 PM
[O08-P47] Cosmic ray measurement at Mt.Fuji
It is known that the frequency of cosmic ray arrivals increases with altitude.
The purpose of this study is to measure the difference in the frequency of cosmic ray arrivals at different altitudes from the ground to the summit (3776m) by using an inexpensive and compact cosmic ray detector, CosmicWatch, to climb Mt. Fuji. For more accurate measurement, cosmic rays were detected continuously during the ascent.
As a preliminary experiment, we measured the frequency of arrival of cosmic rays and altitude continuously up to 2400m (Figure 1). As a result, no significant difference in cosmic ray arrival frequency with altitude could be observed (Figure 2).
The reason for this is thought to be that cosmic rays coming from various directions make it difficult to see differences in the frequency of cosmic ray arrivals at different altitudes.
In order to solve this problem, we are planning to detect cosmic rays using coincidence measurement, in which two detectors are stacked above and below each other and only the data detected by the two detectors simultaneously is recorded.
The purpose of this study is to measure the difference in the frequency of cosmic ray arrivals at different altitudes from the ground to the summit (3776m) by using an inexpensive and compact cosmic ray detector, CosmicWatch, to climb Mt. Fuji. For more accurate measurement, cosmic rays were detected continuously during the ascent.
As a preliminary experiment, we measured the frequency of arrival of cosmic rays and altitude continuously up to 2400m (Figure 1). As a result, no significant difference in cosmic ray arrival frequency with altitude could be observed (Figure 2).
The reason for this is thought to be that cosmic rays coming from various directions make it difficult to see differences in the frequency of cosmic ray arrivals at different altitudes.
In order to solve this problem, we are planning to detect cosmic rays using coincidence measurement, in which two detectors are stacked above and below each other and only the data detected by the two detectors simultaneously is recorded.