Directional Muon flux. By Laura Thorsett and Promita Nandy. Introduction. Testing muon flux at 8 compass directions and 3 azimuth angles. Research Questio n : At which angle and direction do muons reach our detectors in the highest concentration ? - PowerPoint PPT Presentation
Muon directional flux
Directional Muon fluxBy Laura Thorsett and Promita
NandyIntroductionTesting muon flux at 8 compass directions and 3
azimuth angles.Research Question: At which angle and direction do
muons reach our detectors in the highest concentration?Hypothesis:
Most at 90, least at 0.We believed that there would be no
difference in flux at different compass directions.
The angle of acceptanceWhen stacked directly on top of one
another, the angle of acceptance is approx. 168.This creates a
problem:~ 168Overlap3The solutionThe farther apart the detectors
are, the smaller the angle of acceptance.We decided that we wanted
an angle of acceptance of about 45 degrees:To achieve this, we
calculated that the (at the time) 4 detectors should be approx. 9
inches apart.Box (Only 2 Detectors)
Parking garage mishapWe wanted to take the detectors out of the
building to escape the concrete walls, which are thicker in
places.We took it to the top of the parking garage.Light leaks.
Yay.We took them back to the building and retested them, they didnt
work as well as expected.We borrowed 2 detectors from Stu, and
re-calibrated them.Collecting DataFirst, we aligned the box with
the horizon (0):Side ViewTop ViewWe took data with the box facing
N-S, NE-SW, E-W, SE-NW.We did not need to do individual data runs
for North and South or the other pairs, because at 0, they are the
same thing.45 DegreesFor 45, we did take separate data from each of
the compass directions.Side View WestSide View EastEast West90
DegreesWe only needed to take the 90 (straight up) once.Front
ViewTop ViewSide ViewResultsComparisons
from each Azimuth angle45 Degrees by direction0 Compared to
45Extra altitude experimentWe measured the muon count in 3
different positions at Lick Observatory and here at
SCIPP:StackedSide33
InchesLick40634138.538.5SCIPP3401144133.5ConclusionsThere was no
consistent difference in the muon count in relation to compass
direction.When the box was straight up, there was a huge increase
(more than doubling) in the count from the 45 degree count.THE
end!!!!!!!!!!!!!Thank You!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
