1. C.Gustavino, june 4th 2004, Hamburg XPC Status report VETO status report Glass RPC R&D Outline:

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

3. C.Gustavino, june 4th 2004, Hamburg “Floating” XPC Plane technical design

4. C.Gustavino, june 4th 2004, Hamburg

6. 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 VETO system

7. C.Gustavino, june 4th 2004, Hamburg ACB 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.

8. C.Gustavino, june 4th 2004, Hamburg B solution layout

9. C.Gustavino, june 4th 2004, Hamburg moveable structure for RPC mounting with footbridge A 110 mm shift is mandatory for mounting with the footbridge…

10. C.Gustavino, june 4th 2004, Hamburg Glass RPC: activity overview

11. C.Gustavino, june 4th 2004, Hamburg 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)

12. C.Gustavino, june 4th 2004, Hamburg Radiation damaging test (~100 years of OPERA operation) has been performed at the Gamma Irradiation Facility @ CERN By using a 137 Cs source

13. 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,

14. New coating (about 300 k  Glass RPC: technical details Concave profile to prevent discharges New frame glue glass

15. 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 Gap uniformity

16. C.Gustavino, june 4th 2004, Hamburg General Tecnica G&A ICRA

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

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

19. ICRA VS GT Rivelatore GT ICRA GT Icra ICRA GT

20. 1136 mm 2600 mm 200 mm

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