A.D.O.M
Final Presentation
Anna Chang

Experiment
 Launch a balloon to determine a difference in muon count rate
 Compare with count rate at sea level and at ground level
PMT1-
7.15V
Discrim 1-
.300 V
PMT2-
7.30V
Discrim 2
.185 V

Data From Launch
 Data on the ground for 30 minutes
 Took readings every 2 minutes and calculated the rate
 Average count rate of 4.16 Hz
Ground Data
7
6
5
4
3
2
1
0
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32
Time (min)

Data From Launch
Aerial Data
Average= 4.10 Hz
5
4
3
2
7
6
Reached max height
Letting line out
Wind picked up
Resumed reeling
1
0
Reeling in
Stopped reeling in, wind slowed
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36
Time (min)

Raw Data and Errors

Compared to…
 Data at LuLu’s Café at sea level
 Data outside the
Natural Sciences building

Conclusion
 Data collection was successful despite the errors.
 The low count rate of the aerial data could be due to the wind that blew the balloon at an angle thereby reducing the altitude

Next Year
 Do a quick check for light leaks
 Check with my plateau graphs
 Make sure batteries are charged
 Investigate GPS problem, the cable is broken