1. Analog readout for the forward NC Calorimeter (W-Si) BNL, Physics, 06/06/30 E.Kistenev

2. NCC Mechanical Concept

3. Readout unit Si Sensor 256 analog lines Interconnect board Readout … PA board MIP signal in a single Si layer (e)24k ~300 mkm Si MIP signal in a subtower (e)144k 6 Si layers Max. charge per event in a subtower(e) ~ 25 pC 50 GeV deposition, 1.7% sampling fraction Channel capacitance<1000 pF Noise budget~20 ke better be ~4ke

4. Readout unit preamps on the opposite side of the motherboard 256 analog lines Summationboard Time permits …. sqrt(6) noise reduction MIP signal in a single Si layer (e)24k ~300 mkm Si Hits per layer< 800 Max. charge per event in a silicon layer(e) ~2 10 7 or ~ 4 pC (upper limit, may go down) 50 GeV deposition, 1.7% sampling fraction Channel capacitance80pf Noise budget per channel~5k Issues: summing up amplified signals, dynamic range and further handling of sums. Gain – no pickup !!!!!!!!!!! PA board

5. Today Steeve Booze: system design Sasha Voronin: building blocks for a single readout channel