Post on 18-Jan-2018
description
C.Gustavino, june 4th 2004, Hamburg
•XPC Status report•VETO status report•Glass RPC R&D
Outline:
C.Gustavino, june 4th 2004, Hamburg
XPC1 prototype realized and tested (october 2003)XPC mechanical structure: final firm choice (27-3-2004)(INFN approval still in progress)Mounting (structure):XPC1/2 SM1 september 2004 (20 d) XPC2-SM2 may 2005 (7 d) XPC1-SM2 june 2005 (10 d) RPC commissionedStrip commissionedInterconnecting card designed and commissionedMounting (RPC+strips):Details of layout under study Tendering for RPC mounting in progress
XPC Planes
C.Gustavino, june 4th 2004, Hamburg
“Floating” XPC Plane technical design
C.Gustavino, june 4th 2004, Hamburg
C.Gustavino, june 4th 2004, Hamburg
C.Gustavino, june 4th 2004, Hamburg
VETO mechanical structure: final firm choice (may 2004)(INFN approval still in progress)Mounting (structure):februray 2005 or begin of 2006Large Glass RPC under test Details of final layout under study
VETO system
C.Gustavino, june 4th 2004, Hamburg
A CB
A: Poor covering, no fake events from the iron structure, interference with the BMS mounting*, interference with BMS operation?B: good covering, fake events from the pillars no BMS interference.C: good covering, no fake events from the pillars, interference with the BMS mounting*, interference with BMS operation?
*No interference if the mounting is in 2006.
C.Gustavino, june 4th 2004, Hamburg
B solution layout
C.Gustavino, june 4th 2004, Hamburg
moveable structurefor RPC mountingwith footbridge
A 110 mm shiftis mandatory formounting with the footbridge…
C.Gustavino, june 4th 2004, Hamburg
Glass RPC: activity overview
C.Gustavino, june 4th 2004, Hamburg
The 128 glass RPC’s of the Trigger walls of the LNGS test facilityrepresent a real test scale (20% of VETO surface, 80% of equivalent underground life)
C.Gustavino, june 4th 2004, Hamburg
Radiation damaging test (~100 years of OPERA operation)has been performed at the Gamma Irradiation Facility @ CERNBy using a 137Cs source
C.Gustavino, june 4th 2004, Hamburg
Water vapor aging test: after the water damaging a full recovering of the efficiency has been achieved by ammonia flushing,
New coating (about 300 k
Glass RPC: technical details
Concave profile to prevent discharges
New frame
glueglass
Glass RPC: technical details
10 cm spacing leads to 253 buttons20 cm spacing leads to 60 buttons25 cm spacing leads to 24 buttons!!less manpower, higher efficiencyConstraint: tolerance < 20 microns
Gap uniformity
C.Gustavino, june 4th 2004, Hamburg
General Tecnica
G&A
ICRA
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
3500 3700 3900 4100 4300 4500
Veff [V]
Efficienza
EFFsecondogiornoEFFnonogiorno
General Tecnica•3 mm electrodes•1m x 0.50m
Efficiency after 2 days
Efficienza after 9 days
0
500
1000
1500
2000
2500
3400 3600 3800 4000 4200 4400
Veff [V]
RATE [Hz/m2]
day1day2day3Day9
ICRA•3 mm electrodes•0.60m x 0.60m
0.00
0.20
0.40
0.60
0.80
1.00
3600 3800 4000 4200 4400 4600Veff [V]
Efficienza
0
50
100
150
200
250
300
350
400
450
3600 3800 4000 4200 4400 4600
kV per piatto [V]
rate /m^2 [Hz]
rate primo giorno
rate secondo giorno
rate terzo giorno
rate quarto giornoday1day2day3day4
day1
ICRA VS GT
0
100
200
300
400
500
600
700
800
900
3600 3800 4000 4200 4400 4600
kV per piatto [V]
rate /m^2 [Hz]
Rivelatore GTICRA
0.000.100.200.300.400.500.600.700.800.901.00
3600 3800 4000 4200 4400 4600
Veff [V]
Efficienza
GTIcraICRAGT
1136 mm
2600 mm
200 mm
Glass RPC prototype(raw data, no conditioning, low statistic) First class bakelite RPC
Preliminary!