Catania DOM integration status
Emanuele Leonora
1
Status of sun light into the lab: no directly light for all the day
9:00 a.m.
12:30 a.m.
4:30 p.m.
Air conditioning: 1 additional indipendent system
- conditioning system of the Physics Department
The external glass walls are thermal insulated ( as the whole Physics department and
LNS)
Status of the temperature: without the indipendent air conditioning system the
maximun temperature measured was 29° C
we use additional cooling system to work around 25 °C
 no deal with sun light and temperature in the laboratory for assembly and storage
2
Around 11:30 a.m. a little part of the laboratory
near the glass walls has directly sun light.
Prudently, we moved the bench for gel preparation
away from the glass walls
3
storage of gel : a second almost total dark laboratory ( old assembly place)
place and shelfs to store components in dark
- PMTs
- assembled DOMs
4
Hexagon nut-DIN934-M16
old
new
we received a batch for 54 DOMs
different height of the hexagon nuts so far used for the penetrator
We didn’t receive communication about that ( or I missed) so, let me confirm we can use
5
them
assembly status: ( 36 DOMs before the end of 2016)
- 36 + 3 spare bottom hemispheres with PIEZO sensors glued ( until the last
week the only possible actions)
- last week we received a lot of componets and gel
- 6 TOP part with mushrooms glued
- assembly software correctly runned
Assembly software:
we asked to expand the foreseen 40 storage positions in the assembly software (
the bottom with piezo already filled all of them)
Thanks to Daan and Fred (NIKHEF ) Valentina did it
Question about plan for next DU production:
- work in parallel on 36 DOMs ?
- work to finish firstly a string (DOM 201-218)?
… we had UPI only for 18 DOMs
main issues about components:
- we miss PMTs ( we have 101, 3 DOMs )
- we miss PMT structures ( we have 1 complete structure)
- we have 10 penetrators ( thanks for the effort on that)
- we miss collars
- we have to calibrate AHRS on CLBs
6
About the paint of the PMT structures
We planned to use liquid paint becaus we don’t have a properly and safely place where
apply spray in mass amount
The same paint used and tested in NIKHEF and NAPOLI isn’t distributed in Italy
Isn’t possible to buy it from Italy
we received 2 bins from NIKHEF ( thanks to Daan)
no different ways also for future
7
shaping and cut of cooling gap pad
shape required
instructions received from Daan ( thanks ) but …do we have to cover the missing
part of the mushroom?
8
Test on DOM114 to verify effects on PMT of gel defects
its TOP is the worst case for gel defects
Detachments involved a large part of the PMTs and deflector rings
for 6 PMTs
Bottom was good
Functional and
acceptance tests were
OK
Additional tests to
investigate impacts on
PMTs ( coincidence of
K40)
we set the PC follow
the instruction on
WIKI…but we didn’t
reach to perform
acquisition to be
analyzed by JPP (done
in the past…)
problems with software
and codes
Daan planned a next
team viewer section to
set up the PC in Catania
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