1. Status of the EEE telescopes in Catania
II Conferenza dei Progetti del Centro Fermi
Rome - April 20th, 2012
Status of the EEE telescopes in Catania
Paola La Rocca 1

2. II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
The EEE telescopes in Catania 1/4
2 telescopes (CT-01 and CT-02) 3.05 km apart
3.05 Km
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012 2

3. II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
The EEE telescopes in Catania 2/4
TEL CT-01
TEL CT-02
Latitude
37° 31’,500 N
37° 29’,325 N
Longitude
15° 04’,046 E
15° 03’,064 E
Altitude
210 m a.s.l.
110 m a.s.l
Distance between chambers
80 cm
Orientation w.r.t. NORTH
60 °
300°
Position inside the building
Underground floor (5 concrete roofs above the telescope)
Ground floor (light roof above the telescope)
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012 3

4. II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
The EEE telescopes in Catania 3/4
CT-01 Telescope (Department of Physics)
Running from April 2008
Acquisition rate ~ 22 Hz
Collected data ~ 2 x109 events
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012

5. II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
The EEE telescopes in Catania 4/4
CT-02 Telescope (Istituto Tecnico S.Cannizzaro)
Running from December 2008
Acquisition rate~ 20 Hz
Collected data ~ 1 x 109 events
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012

6. II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
Activities in the schools 1/3
Lessons and advanced courses
- “Corso di eccellenza” ( )
- “Corso di Grid Computing” (2010)
- “Corso di Fisica delle Alte Energie” (2011)
- PON Project “Raggi Cosmici in Classe” (2012)
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012

7. II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
Activities in the schools 2/3
Web and Media
- Web Site (eeecatania.tk)
- Participation to Local and national Conferences on Science
- Local newspapers
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012

8. II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
Activities in the schools 3/3
Prof. A.Zichichi
at ITIS Cannizzaro
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012

9. II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
Some scientific results obtained with the EEE telescopes in Catania
Study of the muon flux
- Barometric effect
- Observation of a Forbush decrease
Study of correlations between telescopes
- Short-distance correlations (EEE telescope + scintillator)
- Detection of EAS with EEE telescopes
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012

10. II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
Study of the Barometric Effect
The muon flux measured at the sea level changes with the atmospheric pressure
Atm. Press. (mbar)
Counts/h
~ 7 days
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012

11. II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
Forbush decrease
Valentine’s day solar flare
(Feb. 2011)
Moscow Neutron Monitor
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012

12. II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
Pressure
The solar flare as observed by the CT-01 telescope
Rate
Corrected rate
TIME
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012

13. II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
Correlation between the counting rate measured by the Oulu neutron monitor and the CT-01 telescope
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012

14. II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
Neutron Monitors limits:
- Sensitive to low energy neutrons
- No information about neutrons orientation
Use of muon telescopes/hodoscopes for Forbush decreases:
- Possibility to study the dependence of the Forbush effect upon the zenithal angle of the muons
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012

15. Angular dependence of the amplitude variation
Muons arriving with a larger zenithal angle are supposed to be associated to higher-energy primaries
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012

16. II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
Short-distance correlations (<500m) between EEE telescopes and scintillators
Small scintillator
telescope
Roof
P-3
P-2
P-1 PT
EEE Telescope
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012

17. Astroph. Obs.
450 m
22 d
INFN LNS
146 m
10,5 d
Dept. of Phys.
25 m
3 d
36 m
1,5 d
82 m
11 d

18. II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
d = 25 m
d = 36 m
T
T
d = 82 m
T
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012

19. II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
d = 146 m
d = 450 m
T
T
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012

20. II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
Dechoerence Curve
It can be used to evaluate the expected coincidence rate between 2 EEE telescopes
Rate not corrected for efficiency and acceptance
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012

21. II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
Detection of EAS with EEE telescopes in Catania
15 x 106 events
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012

22. II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
More statistics
100 x 106 events
Rate ≈ 1 coinc/day
No Time Correction
Relative angle < 25°
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012

23. II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
Outlook
- Comparison with results from different EEE sites
- Comparison with simulations
Cagliari
520 m
CERN
15 m
L’Aquila
200 m
Frascati
600 m
Catania
3050 m
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012

24. II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012