Indigenous R & D efforts for HEP detectors

Glass Resistive Plate Chambers for INO experiment

Proposer: B.SatyanarayanaMentor: Prof Naba K Mondal

Department of High Energy Physics, TIFR, Mumbai, 400005

B.Satyanarayana, DHEP, TIFR, Mumbai

DAE Vision 2020, Subtopic 3.8, May 3-4, 2004 2

What is the need? Detectors form the core of scientific research!

What is ‘discoverable’ in an experiment is often limited by capabilities of the employed detector

Why do we need indigenous development? Need for large and sustained efforts Rich experience of various detector

development activities for KGF, DZERO, CMS experiments

Now, the proposed Indian-based Neutrino Observatory (INO) is looking for a new detector!

B.Satyanarayana, DHEP, TIFR, Mumbai

DAE Vision 2020, Subtopic 3.8, May 3-4, 2004 3

The proposed INO detector

Magnetised iron calorimeter

Iron

RP

C

140

laye

rs

• RPC dimension: 3m X 2m

• No of chambers: 11K

• No of channels: 220K

• No of TDC channels: 3K

35KTons

B.Satyanarayana, DHEP, TIFR, Mumbai

DAE Vision 2020, Subtopic 3.8, May 3-4, 2004 4

Why RPCs? Rugged, cheap and easy to produce large area

cells Good timing, counting rate, spatial resolution,

large signals Can take roles of tracking, timing, particle

identification and (even) calorimeter detectors Being used or planned for many HEP, Cosmic ray,

astroparticle physics experiments: All four LHC experiments, Belle, Babar, HARP, EAS-TOP

Choice of designs, modes of operation, gases etc

B.Satyanarayana, DHEP, TIFR, Mumbai

DAE Vision 2020, Subtopic 3.8, May 3-4, 2004 5

Two 2 mm thick float glassesseparated by 2 mm spacers

2 mm thick spacer

Glass plates

Graphite coating on the outer surfaces of glass

Signal pickup strips for X-Y readout

A typical RPC construction

B.Satyanarayana, DHEP, TIFR, Mumbai

DAE Vision 2020, Subtopic 3.8, May 3-4, 2004 6

RPC R & D infrastructure at TIFR

B.Satyanarayana, DHEP, TIFR, Mumbai

DAE Vision 2020, Subtopic 3.8, May 3-4, 2004 7

A few of our preliminary results

B.Satyanarayana, DHEP, TIFR, Mumbai

DAE Vision 2020, Subtopic 3.8, May 3-4, 2004 8

Proposal for new work Double-gap, multi-gap and

Hybrid designs Avalanche versus streamer

modes of operation Gas mixture studies and

optimization MIP efficiency issues Improvement of time

resolution Special RPCs for finer spatial

resolution The all important ageing

concerns

B.Satyanarayana, DHEP, TIFR, Mumbai

DAE Vision 2020, Subtopic 3.8, May 3-4, 2004 9

Proposed plan for new work

Gases, mixing, circulation and monitoring systems

Industrial help for resistive coats on electrodes etc.

In-house development of electronics and DAQ Simulation studies – Process, Device and

Detector Meeting INO design requirements in the process RPC deployments beyond INO Possible spinoffs …

B.Satyanarayana, DHEP, TIFR, Mumbai

DAE Vision 2020, Subtopic 3.8, May 3-4, 2004 10

A proposed spinoff Positron Emission Tomography (PET)

A radiotracer imaging technique using positron emitting radio nuclides

Applications include: Early detection of cancer Neurophysiological studies Quantification of brain functions

Natural advantages in case of RPC Intrinsic layered structure (~100 layers) Simple and economic construction Time-of-Flight capability Considerably lower radiation levels for whole-body PET