1. ARNAB BANERJEE Variable Energy Cyclotron Centre, India

2. VECC participation a.Build ~10% of the MRPC modules (~12 + spares) b.Will provide hardware for the entire low voltage system c. Take part in data analysis, calibration, simulation

3.  L ~ 10 km for down going ~12000 km for up going  E~ few MeV-100GeV Down  near detector  no oscillation Up  far detector  Oscillation Oscillation of atmospheric neutrinos L’L’   L = P(    ; L/E) N up (L/E) N down (L’/E) 3 RPC/MRPC building experience at VECC 1.Facilities developed for RPC R&D for India-based Neutrino Observatory (INO):

4. INO Detector Iron Calorimeter (ICAL) Mass: 50 kTon Size : 48 m (x)  16m (y)  12 m (z) 140 layers of 6 cm thick iron with 2.5 cm gap for active elements Magnetic field ~ 1 Tesla along  y-direction 4

5. Two 2 mm thick float Bakelite Separated by 2 mm spacer 2 mm thick spacer Resistive plates Complete RPC Graphite coating on the outer surfaces of Resistive plates Pickup strips Resistive Plate Chamber for INO 5

6. Full facility for testing 12- RPCs simultaneously and forming tracks in mag. Field 8 Glass RPC + 4 Bakelite RPC 1 Tesla Uniform magnetic field 1m x 1m Bakelite RPC build at VECC  gas system  HV  LV  FEE

7. 2. Double Gap Bakelite MRPC: Bakelite: procured locally. Dimension: 30 cm X 20 cm 3. Four Gap Bakelite MRPC: Dimension: 23 cm X 23 cm 10 mm 230 mm Perspex base Grooving for gas flow (4 mm X 2 mm) 230 mm 7

9. 4. Six Gap Glass RPC: Dimension : 20 cm X 8 cm  Graphite paint is used as conductive material 9 Glass: procured from GSI Glass Thickness: 600 μm Gas gap: 200 μm

10. cosmic-ray test setup Gas distribution system (MFC based) Gas: Ar, iso-butane, SF 6, Freon(R134a) Can be adjusted for both streamer & avalanche mode

11. Schematic representation of cosmic ray setup Master trigger signal = SC1.AND. SC2.AND. SCF Efficiency = (RPC count in coincidence with master trigger) (Master trigger count) 11 Time resolution : START with Master trigger STOP with MRPC

12. Efficiency > 90% Time resolution (FWHM) ~ 3 ns 1.1m X 1m Bakelite RPC 2. Bakelite MRPC Efficiency > 95% Time resolution(FWHM) ~ 2 ns 3. Glass MRPC Efficiency > 90% Time resolution ~ 500 ps (σ)

13. Facility at VECC for LMRPC production for MTD: New Lab for LMRPC production Gas distribution system HV Cosmic setup

14. Requirements from the collaboration:  Read-out system ( electronics for high time resolution measurement)  Raw materials (glass, fishing line, scintillators, etc.)  Pick-up strips  Painting materials & procedure Are they centrally available ???

15. Production Plan: After having all the raw materials ModuleTime 1~ 20 days 12~ 1 years Fabrication : Testing : ModuleTime 12~ 1.5 years After having all the Read-out system If required we can do both the fabrication and test simultaneously

16. Analysis: Analysis is going on for : RUN10 : Cosmic RUN9 : p-p collision plots indicates the position of the MTD properly Plots for RUN10 cosmic: