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XPC Status report VETO status report Glass RPC R&D

Outline:. XPC Status report VETO status report Glass RPC R&D. XPC Planes. 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)

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XPC Status report VETO status report Glass RPC R&D

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  1. Outline: • XPC Status report • VETO status report • Glass RPC R&D

  2. XPC Planes 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 commissioned Strip commissioned Interconnecting card designed and commissioned Mounting (RPC+strips): Details of layout under study Tendering for RPC mounting in progress

  3. “Floating” XPC Plane technical design

  4. VETO system VETO mechanical structure: final firm choice (may 2004) (INFN approval still in progress) Mounting (structure): februray 2005 or begin of 2006 Large Glass RPC under test Details of final layout under study

  5. A B C 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.

  6. B solution layout

  7. moveable structure for RPC mounting with footbridge A 110 mm shift is mandatory for mounting with the footbridge…

  8. Glass RPC: activity overview

  9. The 128 glass RPC’s of the Trigger walls of the LNGS test facility represent a real test scale (20% of VETO surface, 80% of equivalent underground life)

  10. Radiation damaging test (~100 years of OPERA operation) has been performed at the Gamma Irradiation Facility @ CERN By using a 137Cs source

  11. Water vapor aging test: after the water damaging a full recovering of the efficiency has been achieved by ammonia flushing,

  12. Glass RPC: technical details New coating (about 300 kW) glue glass New frame Concave profile to prevent discharges

  13. Gap uniformity Glass RPC: technical details 10 cm spacing leads to 253 buttons 20 cm spacing leads to 60 buttons 25 cm spacing leads to 24 buttons!! less manpower, higher efficiency Constraint: tolerance < 20 microns

  14. General Tecnica G&A ICRA

  15. General Tecnica • 3 mm electrodes • 1m x 0.50m day1 day2 day3 Day9 Efficiency after 2 days Efficienza after 9 days

  16. ICRA • 3 mm electrodes • 0.60m x 0.60m day1 day2 day3 day4 day1

  17. GT Icra ICRA VS GT Rivelatore GT ICRA GT ICRA

  18. 2600 mm 1136 mm 200 mm

  19. Preliminary! Glass RPC prototype (raw data, no conditioning, low statistic) First class bakelite RPC

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