Indian Neutrino Observatory

Indian Neutrino Observatory
Name	Indian Neutrino Observatory
Caption	Schematic concept for an underground neutrino laboratory
Location	India
Status	Proposed
Cost	Proposed
Established	Proposed
Type	Underground laboratory

Indian Neutrino Observatory is a proposed underground laboratory for detection of neutrinos and study of rare particle physics processes in India. The project aims to host long‑baseline neutrino oscillation experiments, low‑background searches for dark matter and neutrinoless double beta decay, and studies of solar neutrinos and supernova neutrino bursts. The initiative involves collaboration among Indian research institutes, international laboratories, and state authorities to build detectors in deep mines or mountain caverns to reduce cosmic ray backgrounds.

Background and Objectives

The proposal emerged from discussions among scientists at institutions such as the Tata Institute of Fundamental Research, Indian Institute of Science, Bhabha Atomic Research Centre, and universities collaborating with international centers like CERN, Fermilab, and KEK. Objectives include precision measurement of neutrino mixing angles, determination of the neutrino mass hierarchy, searches for proton decay motivated by grand unified theory models, and development of Indian capability in underground astroparticle physics. The project is situated within the global context of facilities such as Super-Kamiokande, Sudbury Neutrino Observatory, Gran Sasso Laboratory, SNOLAB, and planned installations like DUNE and Hyper-Kamiokande to create complementary baselines and detector technologies.

Site Selection and Proposed Facilities

Candidate sites discussed in public and scientific fora include deep locations in the Brahmagiri Hills, the Bodi West Hills, and existing mine infrastructures such as the Kolar Gold Fields region and potential tunnels near the Western Ghats and Nilgiri Hills. Criteria considered proximity to research centers (e.g., Mumbai, Bengaluru, Chennai), access to roads and railways (e.g., National Highway 48, Indian Railways corridors), and geotechnical stability similar to sites like Gran Sasso, Kamioka Mine, and Soudan Underground Laboratory. Proposed facilities range from a large water Cherenkov hall inspired by Super-Kamiokande and Hyper-Kamiokande to liquid scintillator rooms akin to Borexino and cryogenic halls for bolometric detectors like those developed for CUORE and GERDA. Support infrastructure planning references standards from agencies such as Atomic Energy Regulatory Board and international partners including Institute of Physics (Bhutan?) for environmental impact frameworks.

Detector Design and Instrumentation

Design options evaluated include a megaton-scale water Cherenkov detector instrumented with photomultiplier tubes similar to those used at Super-Kamiokande and SNO+, liquid argon time projection chambers (LArTPC) following ICARUS and DUNE prototypes, and segmented plastic or liquid scintillator detectors modeled on KamLAND and Borexino. Instrumentation considerations involve arrays of large‑area photomultiplier tubes developed by manufacturers collaborating with Indian Space Research Organisation and industrial partners, cryogenic systems leveraging expertise from Inter-University Accelerator Centre projects, and low‑background material procurement influenced by lessons from GERDA and EXO. Calibration and data acquisition plans draw on methodologies from MINOS, T2K, and NOvA with remote monitoring architectures used at LIGO and IceCube for continuous operation.

Scientific Goals and Research Programs

Primary physics goals are precision measurement of theta_13 and CP violation, resolution of the mass hierarchy using atmospheric and long‑baseline beams, searches for neutrinoless double beta decay to test Majorana fermion hypotheses, and limits on proton decay channels predicted by SU(5) and SO(10) models. Astrophysical programs target real‑time detection of solar neutrinos, observation of neutrino signals from core-collapse supernovae, and indirect searches for dark matter annihilation products in the Sun and Galactic Center. Auxiliary research encompasses geoneutrino measurements inspired by KamLAND results, studies of atmospheric neutrino oscillations like those at Super-Kamiokande, and detector R&D for photodetectors and cryogenics aligned with projects at CERN and Fermilab.

Environmental, Socioeconomic, and Legal Issues

Environmental assessments must address biodiversity concerns in regions overlapping Western Ghats and protected areas such as nearby Nilgiri Biosphere Reserve or other wildlife sanctuaries; mitigation plans draw on precedents from infrastructure projects reviewed by the Ministry of Environment, Forest and Climate Change. Socioeconomic impacts include displacement risks, employment opportunities for local populations in districts of states like Maharashtra, Karnataka, and Tamil Nadu, and land‑use negotiations with state authorities and local panchayats. Legal and regulatory processes involve clearances under Indian statutes processed by bodies like the National Green Tribunal and coordination with ministries including Department of Atomic Energy and Ministry of Science and Technology. Public engagement and stakeholder consultations have been modeled after dialogues held for large science projects such as Golden Quadrilateral transport projects and industrial developments to address community concerns.

Project History, Funding, and Governance

The initiative traces back to proposals from national laboratories including TIFR and BARC in the early 2000s and formal scientific working groups convened with international collaborators from CERN, Fermilab, and KEK. Funding discussions have involved central research funding agencies such as the Department of Science and Technology and the Department of Atomic Energy, proposals to multilateral scientific funding bodies, and potential in‑kind contributions from industry partners and state governments. Governance models under consideration include a consortium structure similar to DUNE and governance boards with representation from participating institutes like IISc, TIFR, BARC, and premier universities, with oversight mechanisms analogous to established labs such as CERN and DESY. The project remains contingent on completing environmental clearances, securing multi‑agency funding, and finalizing site‑specific engineering studies.

Category:Physics projects Category:Particle physics Category:Underground laboratories