Coincidence group
report
Analysis meeting, 13/04/2015
1
Organization of the coincidence
group
List of people:
1. Edoardo Bossini
2. Corrado Cicalò
3. Daniele De Gruttola
4. Marco Garbini
5. Stefano Grazzi
6. Francesco Noferini
7. Laura Perasso
8. Federico Pilo
Analysis meeting, 13/04/2015
2
People and telescopes
BOLO-01
BOLO-03
BOLO-04
Marco, Francesco
CAGL-01
CAGL-02
CAGL-03
Corrado
CERN-01
CERN-02
(Daniele, Francesco, Laura)
FRAS-02
FRAS-03
(we need to be in touch with Silvia and Fabrizio)
LAQU-01
LAQU-02
Daniele
SAVO-01
SAVO-02
SAVO-03
Laura, Stefano (Francesco)
VIAR-01
VIAR-02
Federico, Edoardo
Analysis meeting, 13/04/2015
3
Status of the code (Catania code)
Current version (with some changes with respect the
original code, see next slide) of the coincidence code
avaliable here:
https://github.com/centrofermi/e3analysis
Documentation on the code is available here (thanks
to Paola e Franco):
http://eee.centrofermi.it/collaboration/software
http://eee.centrofermi.it/software/two_telescope_c
orrelations.zip
Analysis meeting, 13/04/2015
4
Changes in the code
Coincidence tree
Coincidence output file
added
added
added
added
added
added
added
added
A tree with quality parameters for each
telescope was added
year,month,day,run,timeduration,ratePe
rRun,rateHitPerRun,fractionGoodTrack
added
added
A tree with the overlap time information
for the two telescope was added
year,month,day,run,run2,timeduration
Analysis meeting, 13/04/2015
5
Telesecope infos and DB
Some information we think are needed to trace the
status of the telescope:
• Distances between the chambers
• Angle w.r.t. Magnetic North (EST at 90 degrees)
• GPS coordinates (altitude)
• Material budget over the telescope
• Height of the bottom chamber from the ground
Are we interested to have such information in a
common place (DB?)?
Analysis meeting, 13/04/2015
6
«good run» definition for
coincidence studies
• Stability of the fraction of tracks with 2 < 10
• Number of event per run >10000
• Run rate within 20% of the telescope average rate
(when conditions are fixed: voltage, number of
active strips, …)
This is a preliminary definition which is under
investigation.
Analysis meeting, 13/04/2015
7
1 strip missing
2 strips missing
3 strips missing
Some quality checks available in
the new version of the code
(ratePerRun – rateHitPerRun - 2)/(ratePerRun - 2)
GPS events
Analysis meeting, 13/04/2015
8
Common strategy to measure several
quantities (under discussion)
• Effective time in data acquisition (needed to extract
the rate)
• Efficiency measurement
• Acceptance computation
Analysis meeting, 13/04/2015
9
Request to the analysis group
• MC is needed to compute acceptance and expected
rates  waiting for Fabrizio’s talk
• Telescope info in the DB?
• Special request: is it possible to have the GPS
information visible in the first page of the DAQ
software (currently is in the 3rd tab). This may help
to check that GPS is really in the DAQ chain.
Analysis meeting, 13/04/2015
10
backup
Analysis meeting, 13/04/2015
11
List of telescopes for coincidences
with Run-1 (pilot run) data
Telescope
Runs
Days
Coincidences Distance
(m)
Rate
CERN-01-CERN-02
Run-1
20
45460
29
2240
BOLO-01-BOLO-04
Run-1
11.3
1550
96
137
LAQU-01-LAQU-02
Run-1
34
1940
204
56.7
CAGL-01-CAGL-02
Pilot, Run-1
101
2060
528
20.3
FRAS-02-FRAS-03
Run-1
24
120 ± 50
625
5 ±2
TORI-03-TORI-04
Run-1
6.5
n.a.
1076
n.a.
SAVO-01-SAVO-02
Pilot, Run-1
88
517
1176
5.9
VIAR-01-VIAR-02
Run-1
16.2
n.a.
1344
n.a.
SAVO-01-SAVO-03
Run-1
7.4
n.a
1467
n.a.
BOLO-01/04-BOLO-03
Run-1
36
n.a.
1491
n.a.
SAVO-02-SAVO-03
Run-1
7.8
n.a.
1711
n.a.
CAGL-01/02-CAGL-03
Pilot, Run-1
116
130 ± 70
2433
1.1±0.6
CATA-01-CATA-02
Run-1
n.a.
3034
12
n.a.
Analysis meeting,
1 13/04/2015
Triple coincidences
Location
3 distances (m)
3 average rates (per s)
Statistics (days)
Bologna
100,1500,1500
42,37,36
10
Cagliari
500,2400,2400
20,33,14
55
Savona
1200,1500,1700
41,49,28
7
So far, for SAVO-03 I considered as «good runs» only the ones starting from
1° April 2015 (fix on the GPS). Previous runs should be checked.
You can find all my coincidences’ trees on the analysis PCs at CNAF under:
/home/noferini/codePaola/
Location
Noise rate (|t12|<1000 ns, |t13|<10000 ns) (per day)
Bologna
0.2
Cagliari
0.03
Savona
0.2
Noise rate = rate_1 * (rate_2* 2E-6 s) * (rate_3*2E-5 s) * (86400 s/ 1 day)
Analysis meeting, 13/04/2015
13