Naba K Mondal, TIFR, Mumbai ICAL ( conceptual) INO Peak at Bodi West Hills Prototype ICAL at VECC 2mX2m RPC Test Stand at TIFR ASIC for RPC designed at BARC RPC Test stand at TIFR

 Accurate determination of the atmospheric parameters (   octant, deviation of    from maximality)  Determination of neutrino mass hierarchy (large    is good news !)  Nonstandard interactions, CPT violation, long range forces, ultrahigh ­energy muon fluxes,...

3 The cavern-I is set under 1589 m peak with vertical rock cover of 1289 m. Accessible through a 1.9 km long tunnel Cavern -1 will host 50 kt ICAL detector. Space available for additional 50 kt. Cavern-2 & 3 available for other experiments ( NDBD, Dark Matter ….).

Construction of the ICAL detector 5

7 No of modules 3 Module dimension 16 m X 16 m X 14.4m Detector dimension 48.4 m X 16 m X 14.4m No of layers 150 Iron plate thickness 5.6cm Gap for RPC trays 4 cm Magnetic field 1.4 Tesla RPC unit dimension 195 cm x 184 cm x 2.4 cm Readout strip width 3 cm No. of RPCs/Road/Layer 8 No. of Roads/Layer/Module 8 No. of RPC units/Layer 192 Total no of RPC units No of Electronic channels 3.7 X 10 6

Edge spacer Gas nozzle Glass spacer Schematic of an assembled gas volume 8

Ope n 100 Ω 51Ω 48.2Ω 47Ω Honeycomb panel G-10 panel Foam panel Z 0 : Inject a pulse into the strip; tune the terminating resistance at the far end, until its reflection disappears. 9

10 Fabrication of 1m x 1m RPCs

1m  1m 11

12 Charge spectrum Time resolution Analog signal due to muon

cosmic ray tracks in the RPC stand 13 Demonstrate the Tracking Capability of the RPC system

Temperature 14

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Max. deflection 4.4mm Max. stress 8.2MPa Spec. 5mm FRP 25MPa Down side view Finite Element Analysis Self weight + 100kg load Extra thickness in selected sections Three-line support Fabricated tray 22

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 Major elements  Front-end board  RPCDAQ board  Segment Trigger Module  Global Trigger Module  Global Trigger Driver  Tier1 Network Switch  Tier2 Network Switch  DAQ Server 24

25 Front end 8 in one Apmlifier-discriminator ASIC developed by BARC

 Principle  Two fine TDCs to measure start/stop distance to clock edge (T 1, T 2 )  Coarse TDC to count the number of clocks between start and stop (T 3 )  TDC output = T 3 +T 1 -T 2  Specifications  Currently a single-hit TDC, can be adapted to multi-hit  20 bit parallel output  Clock period, T c = 4ns  Fine TDC interval, T c /32 = 125ps  Fine TDC output: 5 bits  Coarse TDC interval: 2 15 * T c =  s  Coarse TDC output: 15 bits  The chip has arrived, evaluation tests are in progress it IITM CMEMS is also coming up with an ASIC with similar specs. 26

 Development of graphite coating by automatic spray painting.  Demonstration of successful operation of automatic button and glue dispenser.  Development of glass chamfering and glass Engraving.  Pickup panel development.  Tray design.  Computer modeling of RPC & its assembly in ICAL.  Physical RPC models to study push-pull assembly in ICAL magnet gap. 27

 INO-ICAL detector R&D work is progressing very well. A prototype detector stack with all its associated electronics and data acquisition system is operational at TIFR. We are now in the process of involving local industry for their large scale production.  Various ASIC as well as FPGA based electronics modules/components for data acquisition from the ICAL detector are at various stages of development.  An engineering prototype detector will be constructed at Madurai in next one year.

Thank You for your attention 29