naba k mondal, tifr, mumbai ical ( conceptual) ino peak at bodi west hills prototype ical at vecc...
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India-Based Neutrino
Observatory(INO)
Naba K Mondal, TIFR, Mumbai
ICAL
( conceptual)
INO Peak atBodi West Hills
Prototype ICAL at VECC
2mX2m RPC Test Stand at TIFR
ASIC for RPC designed at BARC
RPC Test stand at TIFR
ICAL: The physics goals
Accurate determination of the atmospheric parameters (q23 octant, deviation of q23 from maximality)
Determination of neutrino mass hierarchy (large q13 is good news !)
Nonstandard interactions, CPT violation, long range forces, ultrahigh energy muon fluxes, ...
Underground Laboratory Layout
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• The cavern-I is set under 1589 m peak with vertical rock cover of 1289 m.
• Accessible through a 1.9 km long tunnel
• Cavern -1 will host 50 kt ICAL detector. Space available for additional 50 kt.
• Cavern-2 & 3 available for other experiments ( NDBD, Dark Matter ….).
INO-ICAL Detector
Construction of the ICAL detector
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ICAL factsheet
No of modules 3
Module dimension 16 m X 16 m X 14.4m
Detector dimension 48.4 m X 16 m X 14.4m
No of layers 150
Iron plate thickness 5.6cm
Gap for RPC trays 4 cm
Magnetic field 1.4 Tesla
RPC unit dimension 195 cm x 184 cm x 2.4 cm
Readout strip width 3 cm
No. of RPCs/Road/Layer 8
No. of Roads/Layer/Module 8
No. of RPC units/Layer 192
Total no of RPC units 28800
No of Electronic channels 3.7 X 106
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Materials for gas volume fabrication
Edg
e
space
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as
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ozz
leG
lass
sp
ace
r
Sch
em
ati
c o
f a
n
ass
em
ble
d
gas
volu
me
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Development and characterisation of signal pickup panels
Open
100Ω
51Ω
48.2Ω
47Ω
Honeycomb panel
G-10 panel
Foam panel
Z0: Inject a pulse into the strip; tune the terminating resistance at the far end, until its reflection disappears.
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Fabrication of 1m x 1m RPCs
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Fully assembled large area RPC
1m 1m
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Prototype RPC Stack at TIFR tracking Muons
Charge spectrum
Time resolution
Analog signal due to muon
cosmic ray tracks in the RPC stand
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Demonstrate the Tracking Capability of the RPC system
RPC strip rate time profile
Temperature
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Making of 2m x 2m RPCs
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2m x 2m glass RPC test stand
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Steps towards Industrial production of RPCs
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RPC fabrication at Asahi Float Glass Co.
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Painting/curing of glass plates
Automatic RPC gap making
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Chamfering and engraving of glass
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RPC holding tray
Max. deflection4.4mm
Max. stress8.2MPa
Spec.5mm
FRP25MPa
Down side view
Fin
ite
Ele
men
t A
nal
ysis
Self weight + 100kg load
Ext
ra t
hic
knes
s in
sel
ecte
d
sect
ion
s
Th
ree-
line
sup
po
rt
Fabricated tray
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Functions & integration of FE-DAQ
Overall scheme of ICAL electronics
Major elements
Front-end board
RPCDAQ board
Segment Trigger Module
Global Trigger Module
Global Trigger Driver
Tier1 Network Switch
Tier2 Network Switch
DAQ Server24
ICAL Front End Electronics ASIC development
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Front end 8 in one Apmlifier-discriminator ASIC developed by BARC
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ASIC based TDC device
Principle Two fine TDCs to measure start/stop
distance to clock edge (T1, T2) Coarse TDC to count the number of clocks
between start and stop (T3)
TDC output = T3+T1-T2
Specifications Currently a single-hit TDC, can be adapted
to multi-hit 20 bit parallel output Clock period, Tc = 4ns
Fine TDC interval, Tc/32 = 125ps Fine TDC output: 5 bits Coarse TDC interval: 215 * Tc = 131.072ms Coarse TDC output: 15 bits
The chip has arrived, evaluation tests are in progress it IITM
CMEMS is also coming up with an ASIC with similar specs.
Technology development for Industrial production of RPCs
Development of graphite coating by automatic spray painting.
Demonstration of successful operation of automatic button and glue dispenser.
Development of glass chamfering and glass Engraving.
Pickup panel development. Tray design. Computer modeling of RPC & its assembly in
ICAL. Physical RPC models to study push-pull
assembly in ICAL magnet gap.
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Current status INO-ICAL detector R&D work is progressing
very well. A prototype detector stack with all its associated electronics and data acquisition system is operational at TIFR. We are now in the process of involving local industry for their large scale production.
Various ASIC as well as FPGA based electronics modules/components for data acquisition from the ICAL detector are at various stages of development.
An engineering prototype detector will be constructed at Madurai in next one year.
Thank You for your
attention
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