INDIA-BASED NEUTRINO OBSERVATORY (INO) STATUS REPORT Naba K Mondal Tata Institute of Fundamental Research Mumbai, India NUFACT Scoping Study Meeting at.

INDIA-BASED NEUTRINO OBSERVATORY (INO)

STATUS REPORT

Naba K Mondal Tata Institute of Fundamental Research

Mumbai, India

NUFACT Scoping Study Meeting at CERN, 22-24 September, 2005

NUFACT Scoping Study meeting at CERN, 22-24 Sep, 2005

2

India-based Neutrino Observatory initiative

• Two phase approach:

R & D and ConstructionPhase I

Physics studies,Detector R & D,Site survey,Human resource development

Phase IIConstruction of the detector

Operation of the Detector

Phase IPhysics with Atmospheric Neutrinos

Phase IIPhysics with Neutrino beam from

a factory

Goal: A large mass detector with charge identification capability


3

Physics using atmospheric neutrinos during Phase I

• Reconfirm atmospheric neutrino oscillation• Improved measurement of oscillation parameters• Search for potential matter effect in neutrino oscillation

• Determining the sign of m223 using matter effect

• Discrimination between and s oscillation

• Probing CP and CPT violation• Constraining long range leptonic forces• Ultra high energy neutrinos and muons


4

Physics with Neutrino beam from NUFACT – Phase II

• Determination of

• Sign of m223

• Probing CP violation in leptonic sector

• Matter effect in oscillation


5

Role of Phase I as a test detector for the factory era

• Currently we only have experience of running magnetised iron detector of upto 5 kton. No experience of running a large mass magnetised detector.

• So during phase I of the operation of the INO detector while we do interesting physics using atmospheric neutrinos, it can also be used as a test detector for the factory era and to improve upon it .

• The modular nature of this detector can even allow us to try out more than one options for the active elements like RPC, scintillators …

• While we have a supporting funding agency in India we need international support and collaboration to achieve this.


6

Disappearance of Vs. L/E

The disappearance probability can be measured with a single detector and two equal sources:

= P( ; L/E) N up(L/E)

N down(L’/E)= 1 - sin2 (2) sin2 (1.27 m2 L/E)


7

Matter Effect & Sign of from event rate

+

-


8

Sign of m32 from matter induced asymmetry

The neutrino and anti-neutrino up/down event ratios are different from each other as well as different with direct and inverted mass hierarchies.

= 5,7,9,11


9

vs s

events will give rise to excess of muon less events. There will be excess of upgoing muonless events.


10

Choice of Neutrino Source and Detector• Neutrino Source

– Need to cover a large L/E range

• Large L range

• Large E Range

– Use Atmospheric neutrinos as source

• Detector Choice• Should have large target mass ( 50-100 kT)

• Good tracking and Energy resolution ( tracking calorimeter)

• Good directionality ( <= 1 nsec time resolution )

• Charge identification

• Ease of construction

• Modularity

• Complimentarity with other existing and proposed detectors

– Use magnetised iron as target mass and RPC as active detector medium


11

INO Detector Concept


12

The Magnet


13

RPC Efficiencies and Timing

RPC working in Streamer mode


14

RPC R & D

120 cm X 90 cm Glass RPCBuilt at TIFR

CMS RPC on test stand

CMS bakelite RPC73 cm X 42.5 cm


15

Detector Simulation• Used NUANCE Neutrino Event Generator

– Generate atmospheric neutrino events inside INO detector

• Used Atmospheric Neutrino Flux of Honda et. al.

• GEANT detector simulation package– Simulate the detector response for the neutrino event

• Generated 5 years of simulated data equivalent to 5 years of running the experiment.

• Analysed oscillation data at two levels– Using NUANCE output and kinematic resolution function– Using full detector simulation

• Obtained preliminary results so far. Detailed simulation is underway.


16

LOCATION OF INO

• PUSHEP (Pykara Ultimate Stage Hydro Electric Project) in South India


17

PUSHEP


18

Underground Cavern

Layout of the Underground Cavern

Size of the experimental hall150 m X 22 m X 30 m

Access tunnel

Experimental Hall

Parking & Storage

Electronics

Experimental Hall


19

Status of the Proposal

• Some R & D fund was made available.• Several institutes from India are currently involved in

various INO related activities.• Underground Site has been chosen.• A presentation to the funding authorities was made on 1st

May 2005.• A second presentation was made on 28th of August, 2005 to

the Scientific Advisory Committee to the Indian Prime Minister (SAC-PM). Response of the committee is very positive.

• We are in touch with the global neutrino community for support and participation.


20

Summary• A large magnetised detector of 50-100 kton is needed to achieve

some of the very exciting physics goals using atmospheric neutrinos.

• A case for such a detector was highlighted earlier by the Monolith Collaboration.

• Physics case for such a detector is strong as evident from recent publications.

• It will complement the existing and planned water cherenkov detectors.

• Can be used as a far detector during neutrino factory era.

• We have started a very active R & D work towards building such a detector.

• Apart from the physics using atmospheric neutrinos, this detector can act as the R & D center for a magnetised iron detector during factory era.

INDIA-BASED NEUTRINO OBSERVATORY (INO) STATUS REPORT Naba K Mondal Tata Institute of Fundamental Research Mumbai, India NUFACT Scoping Study Meeting at.

Documents

detector operation

test detector

large mass detector

single detector

neutrino beam

large mass magnetised

detector r d

choice of neutrino source