C.Gustavino, june 4th 2004, Hamburg XPC Status report VETO status report Glass RPC R&D Outline:
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Transcript of C.Gustavino, june 4th 2004, Hamburg XPC Status report VETO status report Glass RPC R&D Outline:
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C.Gustavino, june 4th 2004, Hamburg
•XPC Status report•VETO status report•Glass RPC R&D
Outline:
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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
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C.Gustavino, june 4th 2004, Hamburg
“Floating” XPC Plane technical design
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C.Gustavino, june 4th 2004, Hamburg
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C.Gustavino, june 4th 2004, Hamburg
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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
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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.
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C.Gustavino, june 4th 2004, Hamburg
B solution layout
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C.Gustavino, june 4th 2004, Hamburg
moveable structurefor RPC mountingwith footbridge
A 110 mm shiftis mandatory formounting with the footbridge…
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C.Gustavino, june 4th 2004, Hamburg
Glass RPC: activity overview
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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)
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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
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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,
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New coating (about 300 k
Glass RPC: technical details
Concave profile to prevent discharges
New frame
glueglass
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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
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C.Gustavino, june 4th 2004, Hamburg
General Tecnica
G&A
ICRA
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General Tecnica•3 mm electrodes•1m x 0.50m
Efficiency after 2 days
Efficienza after 9 days
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ICRA•3 mm electrodes•0.60m x 0.60m
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ICRA VS GT
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Veff [V]
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GTIcraICRAGT
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1136 mm
2600 mm
200 mm
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Glass RPC prototype(raw data, no conditioning, low statistic) First class bakelite RPC
Preliminary!