status of the eee telescopes in catania paola la rocca ii conferenza dei progetti del centro fermi...
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Status of the EEE telescopes in
CataniaPaola La Rocca
II Conferenza dei Progetti del Centro Fermi
Rome - April 20th, 2012
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
3.05 Km
The EEE telescopes in Catania 1/42 telescopes (CT-01 and CT-
02) 3.05 km apart
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
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 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)
The EEE telescopes in Catania 2/4
Running from April 2008
Acquisition rate ~ 22 Hz Collected data ~ 2 x109 events
CT-01 Telescope(Department of Physics)
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
The EEE telescopes in Catania 3/4
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
The EEE telescopes in Catania 4/4
- “Corso di eccellenza” (2008-2009)
- “Corso di Grid Computing” (2010)
- “Corso di Fisica delle Alte Energie” (2011)
- PON Project “Raggi Cosmici in Classe” (2012)
Lessons and advanced courses
Activities in the schools 1/3
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
- Web Site (eeecatania.tk)
- Participation to Local and national Conferences on Science
- Local newspapers
Web and Media
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
Activities in the schools 2/3
Prof. A.Zichichi at ITIS Cannizzaro
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
Activities in the schools 3/3
- Barometric effect
- Observation of a Forbush decrease
Study of the muon flux
Some scientific results obtained with the EEE telescopes in Catania
- Short-distance correlations (EEE telescope + scintillator)
- Detection of EAS with EEE telescopes
Study of correlations between telescopes
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
The muon flux measured at the sea level changes with the atmospheric pressure
Study of the Barometric Effect
Counts/h
Atm. Press. (mbar)
~ 7 daysII Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
Forbush decreaseValentine’s day solar flare (Feb. 2011)
Moscow Neutron Monitorhttp://helios.izmiran.troitsk.ru/cosray/main.htm
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
The solar flare as observed by the CT-01 telescope
Pressure
Rate
Corrected rate
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
TIME
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
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 muonsII Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
Angular dependence of the amplitude variation
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
Muons arriving with a larger zenithal angle are supposed to be associated to higher-energy primaries
Short-distance correlations (<500m) between EEE telescopes and scintillators
PT
P-1
P-2
P-3
Roof
EEE Telescope
Small scintillator telescope
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
d = 36 m
d = 82 m
d = 25 m
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
T T
T
d = 146 m
d = 450 m
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
TT
Dechoerence CurveIt can be used to evaluate the expected coincidence rate between 2 EEE telescopes
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
Rate not corrected for efficiency and acceptance
Detection of EAS with EEE telescopes in Catania
15 x 106 events
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
More statistics100 x 106 events
No Time CorrectionRelative angle < 25°
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
Rate ≈ 1 coinc/day
Outlook- Comparison with results from different EEE sites
- Comparison with simulations
CERN15 m
L’Aquila200 m
Cagliari520 m
Frascati600 mCatania
3050 m
II Conferenza dei Progetti del Centro Fermi, Rome - April 20th, 2012
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