1. C.Gustavino, october 28-31, 2002 1 The RPC testing facility @ LNGS The RPC testing facility @ LNGS Outline : Trigger walls (Glass RPC, Flat Cable Strips, Electronics) Test procedures Schedule

2. C.Gustavino, october 28-31, 2002 2 Lab 2 @ LNGS Each wall is 4 m high, 5 m long. 128 Glass RPCs, 256 digital channels, 64 TDC Before summerNow!

3. C.Gustavino, october 28-31, 2002 3 Glass RPC It is an RPC with electrodes made of standard float glass instead of bakelite with a completely different design approach developed at LNGS. (see C.Gustavino et al. NIMA 457, 558 (2001) ) End caps by injection molding Noryl Envelope Thermoplastic soldering for gas sealing Spacers by injection molding (2 mm) Float Glass Gas Mixture : Argon/Freon/C 4 H 10 /SF 6 = 47/48/4/1 Syntetic coating

4. C.Gustavino, october 28-31, 2002 4 Photo gallery 1

5. C.Gustavino, october 28-31, 2002 5 Photo gallery 2

6. C.Gustavino, october 28-31, 2002 6 Wall FEE electronics The Y (vertical) coordinate is mesured by using the (modified) MACRO digitalcards. The X coordinate is determined by mesuring the time Difference between the pulses propagating along the Flat cable strips. The spatial resolution is ~1 cm in both the coordinates.

7. C.Gustavino, october 28-31, 2002 7 RPC strips and FEE 50 X + 50 Y panels(3 cm wide strips) are ready for RPC test. X strips are equipped with (modified) MACRO cards Y strips are equipped with (modified) MACRO cards through a new inverter card.

8. C.Gustavino, october 28-31, 2002 8 Tentative Schedule Gas System ready for the november 5th Full debug for the end of november First batch test: first week of december Foreseen test rate: 36 RPC/week (efficiency Vs position, currents, rate…)

9. C.Gustavino, october 28-31, 2002 9Conclusions System test facility well in time. The LNGS scientific committee positively impressed Thanks to all the technicians (LNGS mechanical and electronic workshop, people from Padova, LNF, Bologna) for the tremendous work done