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Neutrino Factory and INO

Neutrino Factory and INO. Debasish Majumdar Saha Institute of Nuclear Physics Kolkata, INDIA. NuGoa09 , Internatinal Centre, Goa. Protons are made to impinge on a target Pions are produced Pions decay to muons Muons decay to produce neutrinos -  -   -    +  e + e -

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Neutrino Factory and INO

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  1. Neutrino Factory and INO Debasish Majumdar Saha Institute of Nuclear Physics Kolkata, INDIA NuGoa09, Internatinal Centre, Goa

  2. Protons are made to impinge on a target Pions are produced Pions decay to muons Muons decay to produce neutrinos - -  -   + e + e- → Muon decay length (ct) ~ 126 km (Eμ = 20 GeV) (Too long) → Use muon storage ring instead → Typical design  Two straight sections connected by two arcs → A straight section points towards desired neutrino physics experiment Neutrinos from Neutrino Factory

  3. Beyond Superbeam - Neutrino Factory 7000 KM

  4. Iron Calorimeter (ICAL) Detector atIndia-based Neutrino Observatory • Modular structure • Stacks of 6cm thick iron layers(140 layers in total)interleaved with 2.5cm gaps to accommodate RPC detectors • Dimension of each module 16 m X 16 m X 12 m • Mass of the ICAL detector = 50 kTon (can be achieved by placing 3 modules along x-direction) Dimension → 48 m X 16 m X 12 m

  5. INO Detector Concept

  6. Magic Baseline

  7. Issues Addressed Using Neutrino Oscillation(with INO as the end detector) • Wrong sign muons • Reach of sin2213 • Simulation of Neutrino factory neutrinos at INO (preliminary) Baseline lengths are under study • Rutherford-INO Baseline (7612 km)

  8. Reach of sin2213 • Defined as the value of 13and hencesin2213for whichwrong sign muonsignal yield is just above the statistical error. • Different Boost gives different reach forsin2213 • The variation of E with sin2213 reach is obtained. • Such variation for inverted mass hierarchy and other CP-violation value are being calculated.

  9. SIMULATIONS WITH ICAL DETECTOR a) NUANCE event generator Given the detector specifications and neutrino flux from Neutrino factory it generates neutrino events at ICAL (product particles and their production vertex at ICAL) b) GEANT 3.2 Simulation Code The outputs of NUANCE are the inputs to GEANT GEANT propagates the product particles through ICAL and Gives as outputs, their hit points, momenta, time information etc. c) Analyse the GEANT output

  10. GENERATING OSCILLATED EVENTS USING NUANCE Output details : Event no., particle id,x, y, z, px, py, pz Oscillation probability P() Case I:Oscillation incorporated inside NUANCE itself Case II:From NUANCE output , prob. of each event is calculated using the oscillation formula Now after each event call a random number. If prob.> Random number, then that event survives. If prob.< Random number, then that event is ignored Resulting Output is Oscillated Nuance Data

  11. 50 kTon x 1 year Nuance Data Only No. of events = 187858 (no osc) = 127677(with osc)

  12. Nuance Data Only

  13. Summary : Some physics studies have been made for possible neutrino beams from a possible Neutrino Factory at UK with ICAL at INO as the End-detector. The baseline length of 7613 Km is considered (Rutherford lab  INO) sin2213 reach ~ 0.00002 (13 < 0.5o) at INO is obtained for E ~ 75 GeV. The effect of CP-violation and of mass hierarchy on sin2213 reach are also to be studied.

  14. Collaborators : Sudeb Bhattacharya Kamales Kar Ambar Ghosal Saha Institute of Nuclear Physics, Kolkata, India

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