Status of the EEE telescopes in BolognaReggio Emilia

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Status of the EEE telescopes in Bologna/Reggio
Emilia
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EEE Project
People involved in the EEE Project in Bologna
G. Sartorelli E. Bressan L. Cifarelli F.
Cindolo M. Garbini C. Sbarra E. Scapparone M.
Selvi
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Works done in Bologna since October 2006

• Tests of the MRPCs delivered in Bologna.
• Spatial resolution measurements
• Other measurements
• Trigger card and GPS interface test
• Optimization of software for schools
• Installation inside schools
• EEE Project Bologna group Web Site
• EEE Project DVD

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1. Tests of the MRPCs delivered in Bologna.
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Tests (1)
As reported in the previous meeting we received 3
MRPC on December 2005, serial number 11, 17, 18.
We tested them extensively and found them very
noisy. Another set of MRPCs arrived in October
2006, serial number 50, 51, 52. They were built
at CERN by Bologna Liceo Fermi students. Very
good results on efficiency and rates were
obtained with the second telescope (presented in
the previous EEE Project EC meeting) In December
2006 all the MRPCs (3chambers x 4 schools) for
the Bologna area arrived. We tested (gas
tightness, efficiency and rates) all the chambers
obtaining homogeneous performances.
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Tests (2)
MRPCs tests summary
A total of 18 MRPCs have been tested
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Tests (3) Efficiency of the school telescopes
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Tests(4) Rates of the school telescopes
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2. Spatial Resolution measurements
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Spatial resolution (1)
Method We used the top and bottom chambers to
predict the position of the track in the middle
one. Then we compared the measured position with
the predicted one
Our coordinate system x axis is perpendicular to
the strips y axis is along the strips
MRPC top view
Trigger coincidence of the 3 MRPCs
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Spatial resolution (2) y coordinate
Time difference distributions are not centered in
0 ? Offset
Mean 2.5 ns
Mean 2.2 ns
Mean 2.3 ns
Mean 2.2 ns
Time difference (ns)
Difference between the expected position in
middle chamber and the measured one
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Spatial resolution (3) y coordinate
apply offset correction for each strip we
obtain
x-y distribution before and after offset
correction
MRPC 1
MRPC 1
MRPC 2
MRPC 2
Time difference (ns)
The sigma is 229 ps leading to a time resolution
of st s? (2/3)1/2 ? 187 ps Taking into
account the measured signal propagation velocity
along the strips (17.3 cm/ns) sy ? 1.6 cm
MRPC 3
MRPC 3
Strip number
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Spatial resolution (4) x coordinate
Taking into account the strip pitch (3.2 cm) sx
? 0.96 cm
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3. Other measurements
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Other measurements (1)
RATE vs DISTANCE
1 Muon rate as a function of the distance between
the MRPCs compared with simulation
2 Muon zenith angle (in space) compared with
simulation
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Other measurements (2)
We measured the telescope trigger rate both
using GPS and TDCs time and using the trigger
card as scaler
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4. Trigger card and GPS Interface test
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Trigger card and GPS Interface test
We tested the Trigger card (Local Trigger Module)
designed by E. Scapparone and the GPS interface.
LTM
GPS Interface
Provides MRPCs trigger
Provides GPS time and reset TDC clock counters
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5. Optimization of software for schools
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Optimization of software for schools

• In order to help students and teachers to monitor
  the telescope we prepared an user friendly
  graphical interface (EEE Commands Panel) to the
  analysis programs
• With the help of this panel it is possible to
• Organize data files
• Analyze data
• Look to histograms
• Look to event display

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6. Installation inside schools
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Installation inside schools (1)
Reggio Emilia inauguration on 11/05/07
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Installation inside schools (2)
Status of Reggio Emilia telescope

• Inauguration of the telescope in May
• We are working with students and teachers to set
  the detector to work.
• Soon we will have the detector in full data
  acquisition. We were waiting for GPS interface
  card and now they are ready!

Next telescope inauguration

• Installation of telescope in the Liceo Fermi in
  Bologna is completed, in a short time we will be
  ready to inaugurate

Next telescope installation

• We are planning installation inside Liceo
  Galvani in Bologna. We are waiting for DC/DC
  converters and FEAs (few weeks)

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After installation inside Liceo Galvani we will
have 3 telescopes in the Bologna area
Installation inside schools (3)
After installation inside Liceo Galvani we will
have 3 telescopes in the Bologna area
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7.EEE Project Bologna group web site
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EEE Project Bologna group web site

• For schools
• to share usefull informations
• to share pictures of the EEE telescopes
• For students
• to learn through links on cosmic rays physics
• For researchers
• to keep usefull documents and files under
  restricted areas (mechanics and electronics,
  analisys results, schools database)
• For everyone
• to inform on the EEE Project in Bologna
• http//www.bo.infn.it/eee/
• will be soon released

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8. EEE Project DVD
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EEE Project DVD

• In order to prepare a DVD to be distributed to
  High Schools we prepared texts,pictures and
  photos regarding
• Cosmic ray physics
• The MRPC detector and the EEE telescope
• Working principles of the detectors and the muon
  telescope
• We also helped in film recording at Reggio Emilia
  telescope.

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Conclusions

• All the MRPCs delivered in Bologna have been
  tested
• With the exeption of the first set all the MRPCs
  show good performances
• The spatial resolution has been measured to be
  (1.6 x 0.96) cm2
• Tests have been performed on VME Trigger card and
  GPS Interface so that we can take data without
  the need of NIM crate
• Analysis codes have been optimized to monitor the
  detector and a user friendly interface has been
  prepared
• Installation inside schools started and is going
  on. By the end of this year we may have 4 working
  telescopes (3 in Bologna 1 Reggio Emilia)
• Two schools need the full gas and electronics
  equipment