C.Gustavino, october 28-31, 2002 1

The RPC testing facility @ LNGSThe RPC testing facility @ LNGS

OutlineOutline::Trigger walls (Glass RPC, Flat Cable Strips, Electronics)Trigger walls (Glass RPC, Flat Cable Strips, Electronics)Test proceduresTest proceduresScheduleSchedule

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Lab 2 @ LNGSLab 2 @ LNGS

Each wall is 4 m high, 5 m long. 128 Glass RPCs, 256 digital channels, 64 TDC

Before summer Now!

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Glass Glass RPCRPCIt 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

NorylEnvelope

Thermoplastic solderingfor gas sealing

Spacers by injection molding

(2 mm)

Float Glass

Gas Mixture : Argon/Freon/C4H10 /SF6= 47/48/4/1

Synteticcoating

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Photo gallery 1Photo gallery 1

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Photo gallery 2Photo gallery 2

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Wall FEE electronicsWall FEE electronics

The Y (vertical) coordinate is mesured by using the (modified) MACRO digitalcards.

The X coordinate is determined by mesuring the timeDifference between the pulses propagating along the Flat cable strips.

The spatial resolution is ~1 cm in both the coordinates.

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RPC strips and FEERPC strips and FEE

50 X + 50 Y panels(3 cm wide strips) are ready for RPC test . X strips are equipped with (modified) MACRO cardsY strips are equipped with (modified) MACRO cards through a new inverter card.

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Tentative ScheduleTentative Schedule

Gas System ready for the november 5thGas System ready for the november 5th

Full debug for the end of novemberFull debug for the end of november

First batch test: first week of decemberFirst batch test: first week of december

Foreseen test rate: 36 RPC/week (efficiency Vs position, currents, rate…)

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ConclusionsConclusions

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