SLIDE 1
Locating the Source
- f Cosmic Rays
Presentation Index
- Introduction to Cosmic Rays
- The HiSPARC Experiment
- Methods and Results
- Conclusions
- Acknowledgements
Locating the Source of Cosmic Rays Using HiSPARC Lewis Anderson - - PowerPoint PPT Presentation
Locating the Source of Cosmic Rays Using HiSPARC Lewis Anderson - - PowerPoint PPT Presentation
Locating the Source of Cosmic Rays Using HiSPARC Lewis Anderson Presentation Index Introduction to Cosmic Rays The HiSPARC Experiment Methods and Results Conclusions Acknowledgements Cosmic Rays Fast moving
SLIDE 2
SLIDE 3
Cosmic Rays
- Fast moving
particles
- Protons (85%), alpha
particles (12%) and electrons (2%)
- Range of energies,
from 109eV to 1020eV
- Unknown sources
- Cause air showers
SLIDE 4
The HiSPARC Experiment
- High School Project on Astrophysics
Research with Cosmics
- Recording data since 2002
- Set up in “clusters” – Bristol, Amsterdam &
Birmingham
SLIDE 5
Locations of HiSPARC Detectors
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HiSPARC Detectors
- Detectors stations of roofs of schools and
academic institutes.
- Two scintillator plates detect Muons
- Data sent to central database in Nikhef
SLIDE 7
Calculating Angle of Cosmic ray Excess
- Event data taken from HiSPARC public
database.
- 3 consecutive weeks, 27 detectors.
- Calculated angle for times throughout
- bservation period.
- Weighted data and x-y components
calculated using Fourier transformation.
- Found direction of source and calculated
Right Ascension.
- Calculated percentage deviation.
SLIDE 8
Calculating Angle of Cosmic ray Excess
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Calculating Angle of Cosmic ray Excess
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2 4 6 8 10 12
0-60 60-120 120-180 180-240 240-300 300-360
Number of Detectors Right Ascension /degrees Week Beginning 26th May 2014 Week Beginning 2nd May 2014 Week Beginning 9th May 2014
Results
Two different statistically significant peaks.
SLIDE 11
Triangulation of Primary Particle Direction
- Science park cluster.
- Individual coincidence data for events
detected by 6 or more detectors over 4 days.
- Relative positions and detection times for first
3 detectors found.
- 120
- 100
- 80
- 60
- 40
- 20
20 40 20 40 60 80 100 120
y / metres x / metres
Stations 503, 506, 507
SLIDE 12
Triangulation of Primary Particle Direction
- Azimuth and Zenith angles for primary
particle calculated.
- Used to Calculate right ascension and
declination.
SLIDE 13
Results
Uniform distribution of right ascensions
- 40
- 20
20 40 60 80 100 120 50 100 150 200 250 300 350 400
Declination//degrees Right Ascension/degrees
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Conclusions
- First method found angular dependence
for 2 of 3 weeks.
- Could not find source at those positions.
- Found no angular variation for second
method.
- Improvements could be made to method
and become more effective as HiSPARC network grows.
SLIDE 15
Acknowledgements
- Dr Maria Pavlidou
- Dr Cristina Lazzeroni
- Dr Ilya Mandel
- Dr Laura Vickers
- University of Birmingham
SLIDE 16