Hardware upgrade meeting, CERN, 5.2.2014. Page 2

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Transcript Hardware upgrade meeting, CERN, 5.2.2014. Page 2

Faculty of Physics,
University of Belgrade
Jovan Puzović,
Faculty of Physics, Belgrade
ToF-RL Schedule/Resources
Hardware upgrade meeting, CERN
3rd-6th of March, 2014.
Faculty of Physics,
University of Belgrade
-
HV upgrade - status
Crates R-1 and R-2 installed in the pit (20 distributors)
Connection established, demo monitor program works
Amplitude spectra identical with CAEN and BG HV
distributors!
Crate R-3 with 10 distributors already in CERN, wait to be
installed
Jovan Puzović, Belgrade SHINE team
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Hardware upgrade meeting, CERN, 5.2.2014.
Faculty of Physics,
University of Belgrade
-
HV upgrade - overview
Everything's goes fine
To finish upgrade needs 7-8 working days
Foreseen for summer this year (4.8 - 12.8)
Hardware commission: mid of August
Integration to DCS – autumn this year
Jovan Puzović, Belgrade SHINE team
Page 3 out of 9
Hardware upgrade meeting, CERN, 5.2.2014.
Faculty of Physics,
University of Belgrade
Pixels repair
- Currently, 98 pixels on ToF-L don't work, and 24 on ToF-R
(our analysis, based on ToF online monitoring program)
- We found some spare PMTs with scintilators
6 cm – 1 pcs
(needed ~30)
7 cm – 17 pcs
(needed ~30)
8 cm – 25 pcs
(needed ~30)
-------------43 pcs
(needed ~90)
- Condition unknown, hope they are OK
- Replacement scheduled for mid August
Jovan Puzović, Belgrade SHINE team
Page 4 out of 9
Hardware upgrade meeting, CERN, 5.2.2014.
Faculty of Physics,
University of Belgrade
PMTs
- FEU-87 doesn’t produce any more, no spare
- Hamamatsu R3478 founded as spare parts from Buda wall
- 20-30 pieces
- A lot more in Buda wall,
optically connected with
grease, can be dismounted
- Smaller than FEU,
mechanically can be
adapted to fit in existing
cassette
Jovan Puzović, Belgrade SHINE team
Page 5 out of 9
Hardware upgrade meeting, CERN, 5.2.2014.
Faculty of Physics,
University of Belgrade
R3478 - Characteristic
- Wavelength (Peak): 420nm
- Dynode Stages: 8
(FEU-87 11!)
- Anode to Cathode Supply Voltage: 1700V
- Max Anode to Cathode Voltage: 1800V
- Gain Typ.: 1.7 x 106
- Rise Time Typ.: 1.3 ns
- Timing performance seems OK, but amplitude?
- Need to be justify, gain doesn’t seems OK!
Jovan Puzović, Belgrade SHINE team
Page 6 out of 9
Hardware upgrade meeting, CERN, 5.2.2014.
Faculty of Physics,
University of Belgrade
Conclusion
- Hamamatsu PMT has to be tested with our scintillators
- According to characteristics, doesn’t look promising (gain)
- We need output of order of volts!
- I this PMT perform well, then we can think to produce
replacement for bad pixels in ToF
Jovan Puzović, Belgrade SHINE team
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Hardware upgrade meeting, CERN, 5.2.2014.
Faculty of Physics,
University of Belgrade
-
ToF-LR Software
Mihailo Savic left Shine
Claim that he finished all jobs taken in the past
Obviously, this is not true!
We have to identify which jobs are not finished (Andras)
Then we have to see which can be done by Belgrade!
As always, man power is critical!
Jovan Puzović, Belgrade SHINE team
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Hardware upgrade meeting, CERN, 5.2.2014.
Faculty of Physics,
University of Belgrade
Thank you!
Jovan Puzović, Belgrade SHINE team
Page 9 out of 9
Hardware upgrade meeting, CERN, 5.2.2014.