AIMS 1- Build SDHCAL prototype of 1m3 as close as possible to the one we propose in ILD LOI - Detectors : High efficiency and homogeneity low cost, negligible dead zones -Mechanical structure : Self-supporting -Electronics readout : semi-digital, low consumption Establish a realistic calibration procedure before and after construction : charge injection, cosmics 3 Test the power pulsing Perform simulation study : - Realistic detector -optimize PFA with 1cm2 granularity, semi-digital readout -study relevant physics processes

Groups France : IPNL, LAL, LLR, LPC Russia : IHEP-Protvino Spain : CIEMAT Belgium : Louvain-La-Neuve, Ghent China : Tsinghua Tunisia : Tunis Collaboration with: CERN-Bologna (MGRPC) LAPP(DIF)

scintillator Single particle Jet KEK(Matsunaga et al) Gas(GRPC) dE/dX Single particle charge

GRPC for the SDHCAL Thickness of few millimeters to reduce the coil cost Efficient, Homogenous, cheap and easy to build Cathode coating Glass plate (1.1mm) Chamber wall (1.2mm) Spacer (fishing lines) Glass plate (0.7mm) Anode coating Insulation (Mylar) Pads (copper, 1 cm2) PCB ASIC Gas

1m2 Project Spacers: Replacing fishing lines with ceramics mini balls to reduce dead zone Deformation<40µ

1m2 Project Gas distribution : using channeling to distribute gas evenly  More efficient gas renewal  less gas consumption Max Velocity 1 mm/s

1m2 Project Resistive coatings: select the most appropriate painting which provides the lowest pad multiplicity and the highest efficiency Silk-Screen printing: Provides homogenous and well controlled coating

Aging, environment studies going on at GIF@CERN

Electronics for GRPC-SDHCAL 4.7 mm 4.3mm Electronics for GRPC-SDHCAL ASICs : HARDROC1(2) 64 channels 2(3) thresholds Range: 10 fC-10pC Gain correction  uniformity Power-pulsed consumption< 10µW/ch (0.5% duty cycle), X-talk < 2% 30 fC 10 fC Piedestal DAC output (Vth) Trigger 25 µs

DAQ Schematic view LDA ODR PC DAQ for m3 HDMI USB USB Web browser USB DIF supervisor Event builder Storage DHCAL slab DIF USB DIF supervisor DHCAL slab DIF UI manager USB Web browser DIF supervisor DHCAL slab DIF Online monitor USB Main FSM DAQ software (Xdaq framework) CMSILC 10

The 1m2 project 12

Efficiency in two different zones of the detector 13

The 1m3 project Self-supporting mechanical structure Beam gas DIF H.V Beam DIF DIF gas Services: DIF,HV,Gas

The 1m3 project Robot to test the 8000 ASIC’s (CMSILC transfer)

Thin (0,8mm) Semiconductive glass Do we need high rate for ILC? Float glass : 1013 Ω.cm  GRPC rate detection < 100 Hz/cm2 Semi-conductive glass 1010 Ω.cm  GRPC rate detection > 10 KHz/cm2 (high efficiency) Thin (0,8mm) Semiconductive glass Thick(1,1 mm) Semiconductive Glass

Hadronic showers Beam Comparison data/simulation of GRPC 1 GRPC 2 GRPC3 GRPC4 Beam GRPCs Comparison data/simulation of shower development, and energy deposition in the mini DHCAL Muon contamination area 18 18