ligo-india

LIGO-IndiaAn Indo-US joint mega-project concept proposal

IndIGO Consortium(Indian Initiative in Gravitational-wave Observations)

www.gw-indigo.org

Tarun Souradeep, IUCAA (Spokesperson, IndIGO)

LIGO-India: Salient points of the megaproject

• On Indian Soil with International Cooperation (no competition)• Partner in major science discovery!!! (i.e., Shared science risk with the

International community.)

• AdvLIGO setup & initial setup risks primarily rests with USA. – AdvLIGO-USA precedes LIGO-India by > 2 years.– Vacuum 10 yr of operation in initial LIGO 2/3 vacuum enclosure + 1/3 detector assembly

split (US ‘costing’ : manpower and h/ware costs)– Indian expters can contribute to AdvLIGO-USA : opportunity without primary responsibility

• US hardware contribution funded & ready – AdvLIGO largest NSF project funded in USA– LIGO-India needs NSF approval, but not additional funds from USA

• Expenditure almost completely in Indian labs & Industry• Very significant Industrial capability upgrade.• Well defined training plan Large number of highly trained HRD• Major data analysis centre for the entire LIGO network

Schematic Optical Design of Advanced LIGO detectors

LASERAEI, Hannover

Germany

SuspensionGEO, UK

Reflects International cooperation

Basic nature of GW Astronomy

LIGO labs LIGO-India

?

LIGO-India: unique once-in-a-generation opportunity

Courtesy: Stan Whitcomb 5

Advanced LIGO Laser• Designed and contributed by Albert Einstein Institute, Germany• Much higher power (to beat down photon shot noise)

– 10W 180W (narrow sub kHz line width)• Better stability

– 10x improvement in intensity (nano ppm) and frequency stability (mHz)

• Unique globally. Well beyond current Indian capability. Would require years of focused R &D effort. Both power and frequency stability ratings.

• AdvLIGO laser has spurred RRCAT to envisage planning development of similar laser capability in the next 5 year plans. IIT M group also interested.

• Multiple applications of narrow line width laser : Freq time stand, precision metrology, Quantum key distribution, high sensitivity seismic sensors (geo sc.), coherence LIDAR (atm sc.), ….


Advanced LIGO Mirrors• Larger size

– 11 kg 40 kg, 2534 cm• Smaller figure error

– 0.7 nm 0.35 nm • Lower absorption

– 2 ppm 0.5 ppm

• Lower coating thermal noise

Feb 2011 Status• All substrates delivered• Polishing underway• Reflective Coating process

starting up

• Surface specs (/1000) : 100 x best optical telescope

• Surface specs currently available in India for much smaller sizes /20

• Indian industry may now be challenged to achieve on small scale, eg., for TIFR 3m prototype

• Technology for such mirror useful for high optical metrology and other specialized applications

Courtesy: Stan Whitcomb7

Advanced LIGO Seismic Isolation• Two-stage six-degree-of-freedom active isolation

– Low noise sensors, Low noise actuators– Digital control system to blend outputs of multiple sensors,

tailor loop for maximum performance– Low frequency cut-off: 40 Hz 10 Hz

• Unique design • New benchmark for isolation experiments in India : gravitation, Space sensor appls.…

• Application in various industrial and lab test centers


Advanced LIGO Suspensions

• UK designed and contributed test mass suspensions

• Silicate bonds create quasi-monolithic pendulums using ultra-low loss fused silica fibres to suspend interferometer optics

– PendulumQ ~105 ~108

– resonance subHz– suppression 1/f^4

per stage (6 stages)

8

40 kg silica test mass

four stages

“Quantum measurements” to improve further via squeezed light:

• Potential technology spin-offs will impact quantum computing and quantum key distribution (QKD) for secure communications. (IITM approached by ITI for QKD development.)

• New ground for optics and communication technology in India

• High Potential to draw the best Indian UG students, typically interested in theoretical physics, into experimental science !!!


LIGO-India : Expected Indian Contribution

LIGO-India: … the challenges

Indian contribution in Engineering. & infrastructure:

Ultra-high Vacuum enclosure on large scale (1.)

Site (L-configuration: Each 100-200 m x 4.5km: < 300 acres)

(4.) HPC -Data centre (5.)


Indian contribution in human resources: Trained Scientific & engineering manpower for detector

assembly, installation and commissioning (2.)

Trained SE manpower for LIGO-India sustained operations

for next 10 years (3.)

Major enhancement of Data Analysis team. Seek

Consolidated IndIGO participation in LIGO Science Collab.

(Sept 2011)

Expand theory and create numerical relativity simulation.

Expect hiring in premier institutions


LIGO-India : Vacuum structure & engineering


1. Large scale ultra-high Vacuum enclosureS.K. Shukla (RRCAT), A.S. Raja Rao (ex RRCAT),

S. Bhatt (IPR), Ajai Kumar (IPR)

To be fabricated by Industry with designs from LIGO. A pumped volume of 10000m3 (10Mega-litres), evacuated to an ultra high vacuum of nano-torr (10-9 torr ).

Courtesy: Stan Whitcomb

Spiral weld UHV beam tubes1.2 m dia: 20 m sections.

Sections butt welded to 200m

UHV Optical tanks to house mirrors : end, beam splitter,…

Expansion Bellows btw 200m beam sections, 1 m gate valves

LIGO-G1100108-v1

LIGO Vacuum Equipment


• Large vacuum chamber fabrication under stringent UHV requirement

• Significant capability upgrade for Indian industry

• Comparable, but smaller UHV chambers in IPR facility

LIGO-G1100108-v1

LIGO Beam Tube

• LIGO beam tube under construction in January 1998

• 16 m spiral welded sections

• girth welded in portable clean room in the field

1.2 m diameter - 3mm stainless50 km of weld

NO LEAKS !! (10Mega-litres at nano-torr)Major Engg. ChallengeUnprecedented scale


Constructed > 1 decade back.Operating in Initial LIGO for ~10yrs

LIGO-G1100108-v1

Concrete Arches

beamtube transport

beamtube install

girth welding

Beam Tube Construction


LIGO-G1100108-v1 IndIGO - ACIGA meeting 18

LIGO beam tube enclosure

• minimal enclosure

• reinforced concrete

• no services


• Fabricated and installed by Indian Industry under close monitoring by science & technology team

o Oversee the procurement & fabrication of the vacuum system components and its installation by a national multi-institutional team.

o DAE commitment to LIGO-India Intense participation of RRCAT & IPR possible.

o All vacuum components such as flanges, gate-valves, pumps, residual gas analyzers and leak detectors will be bought.

o Companies L&T, Fullinger, HindHiVac, Godrej, … with close support from RRCAT, IPR and LIGO Lab.

• Preliminary detailed discussions with Industry in Feb 2011 : Companies like HHV, Fullinger, Godrej in consultation with Stan Whitcomb (LIGO), D. Blair (ACIGA) since this was a major IndIGO deliverable to LIGO-Australia.

• Preliminary Costing for LIGO-India vacuum component is 400 cr.

Summary: Large scale ultra-high Vacuum

LIGO-G1100108-v1

Detector Installation using Cleanrooms

• Chamber access through large doors


LIGO-G1100108-v1

Optics Installation Under Cleanroom Conditions


•High precision skills

• Low contamination labs & trained manpower for related Indian labs & industry

• Application in other sciences, eg. Material sciences, Space , biotech ,…

LIGO-India : Detector Assembly &

commisionning


2. Detector Assembly & CommissioningFor installation and commissioning phase:• Identify 10-15 core experienced Enggs. & scientists who spend a year, or more,

at Advanced LIGO-USA during its install. & comm. – LIGO proposal document– Already 1 IndIGO post-doc at LIGO Caltech, another under consideration in LIGO and EGO– Need positions back in India for them! (Once project manpower sanctioned, LIGO-India

project hiring required at institutions like RRCAT, TIFR, IUCAA,….)• 6-10 full time engineers and scientists in India.

Present experimental expertise within IndIGOLaser ITF: TIFR, RRCAT, IITM, IIT K.

UH Vacuum: RRCAT, IPR, (TIFR, IUCNS, new IUCs? )Each group can scale to 10 Post-doc/PhD students. Over 2-3 years. Train on 3-m prototype .

LIGO-India : Trained Manpower generation

and sustenance



3. Manpower generation for sustenance of LIGO-India : Preliminary Plans & exploration

• Advanced LIGO USA will have a lead time over LIGO-India Indian personnel trained in USA bring expertise to LIGO-India and build groups using associated training program. (DST /Academy/… programs, e.g, BOYSCAST, Ramanujan may be helpful, perhaps not sufficient.)

• IndIGO Summer internships in International labs underway (2nd year).o High UG applications 30/40 each year from IIT, IISER, NISERS,..o 2 summers, 10 students, 1 starting PhD at LIGO-MITo Plans to extend to participating National labs to generate more experimenters

• IndIGO schools are planned annually to expose students to emerging opportunity in GW science

o 1st IndIGO school in Dec 2010 in Delhi Univ. (thru IUCAA)o Funded ICTS Cosmology & GW school in IUCAA, Dec 2011

• Training school (Jayant Narlikar) & also Post graduate school specialization course

Indo-US centre for Gravitational Physics and Astronomy

• Centre of IUSSTF (Indo-US Science and Technology Forum )

• Exchange program to fund mutual visits and facilitate interaction.

• Nodal centres: IUCAA , India & Caltech, US.

• Institutions:

Indian: IUCAA, TIFR, IISER, DU, CMI - PI: Tarun Souradeep, IUCAA US: Caltech, WSU - PI: Rana Adhikari, Caltech

APPROVED for funding (Dec 2010)

Requirements:

• Low seismicity • Low human generated noise• Air connectivity• Proximity to Academic institutions, labs, industry preferred, …


4. Indian Site

Preliminary exploration: IISc new campus & adjoining campuses near Chitra Durga

• low seismicity• Solid rock base• 1hr from International airport• Bangalore: science & tech hub• National science facilities complex plans power and other infrastructure availability, ….

Primary Science: Online Coherent search for GW signal from binary mergers using data from global detector network

Coherent 4 x event rate (40 160 /yr for NS-NS) Role of IndIGO data centre

Large Tier-2 data/compute centre for archival of GW data and analysis Bring together data-analysts within the Indian science community. Puts IndIGO on the global map for international collaboration with LIGO

Science Collab. wide facility. Part of the LSC participation by IndIGO Large University sector participation via IUCAA

• 200 Tflops peak capability (by 2014) • Storage: 4x100TB per year per interferometer.• Network: gigabit+ backbone, National Knowledge Network• Gigabit dedicatedlink to LIGO lab Caltech

• 20 Tf 200 Tb funded IUCAA : ready Mid 2012

5. IndIGO Data Centre@IUCAA Anand Sengupta, DU, IndIGO

LIGO-India: … what is needed? Organizational

National level DST-DAE Consortium Flagship Mega-project Identify a lead institution and agency Project leaderConstruction: Substantial Engg project building Indian capability in large vacuum system engg, welding techniques and technology Complex Project must be well-coordinated and effectively carried out in time and meeting the almost zero-tolerance specsTrain manpower for installation & commissioning Generate & sustain manpower running for 10 years. Site short lead time International competition (LIGO-Argentina ??)

Technical vacuum enclosure (tubes & end station) Detector assembly and commissioningData centre

• Home ground advantage !!! Once in a generation opportunity• Threshold of discovery and launch of a new observational window in

human history!! Century after Einstein GR, 40 yrs of Herculean global effort

• Cooperative, not competitive science• India at the forefront of GW science with 2nd generation of detectors: Intl.

shared science risks and credit• Low project risk: commit to established tech. yet are able to take on

challenges of advLIGO (opportunity without primary responsibility)• Attain high technology gains for Indian labs & industries

• India pays true tribute to fulfilling Chandrasekhar’s legacy: ””Astronomy is the natural home of general Astronomy is the natural home of general

relativity”relativity”An unique once-in-a-generation opportunity for India. India could play

a key role in Intl. Science by hosting LIGO-India. Deserves National mega-science project status

Concluding remarks on LIGO India

“Every single technology they’re touching they’re pushing, and there’s a lot of different technologies they’re touching.” (Beverly Berger, National Science Foundation Program director for gravitational physics. )

LIGO-India: Action pointsIf accepted as a National Flagship Mega Project under

the 12th plan then…Seek immediate Seed Grant (50 lacs: now-Mar 2012)

• Identification of 3-6 project leader & team building – Detailed Project Proposal (prior to NSF review Dec 30, 2011)

– Site identification, characterization (& acquisition) procedures

– 1st national Staffing Requirement meeting early Aug 2011.

– 2nd Joint Staffing Meeting with LIGO-Lab before seeking formal NSF approval.

– Vacuum Task related team and early plans.• Identify and mobilize industry and lab partnership & training with

work package demonstration

Thank you !!!Thank you !!!

LIGO-India: … the challengesLIGO-India: Project team requirements

LIGO-India Director

Project manager

Project engineering staff: Civil engineer(s)Vacuum engineer(s)Systems engineer(s),Mechanical engineersElectronics engineersSoftware engineers Detector leaderProject system engineer

Detector subsystem leaders 10-15 talented scientists or research engineers with interest and knowledge collectively spanning:Lasers and optical devices, Optical metrology, handling and cleaning, Precision mechanical structures, Low noise electronics, Digital control systems and electro-mechanical servo design, Vacuum cleaning and handling)

Indian Gravitational wave strengths• Very good students and post-docs produced in Indian GW groups over 20yrs .

* Leaders in GW research abroad [Sathyaprakash, Bose, Mohanty] (3) * Recently returned to faculty positions at premier Indian institutions (6)

– Gopakumar (Jena TIFR) and Arun (VirgoCMI) : PN modeling, dynamics of CB, Ap and cosmological implications of parameter estimation

– Rajesh Nayak (UTB IISER K) , Archana Pai (AEI IISER T), Anand Sengupta (LIGO, Caltech Delhi), Sanjit Mitra (JPL IUCAA ): Extensive experience on single and multi-detector detection, hierarchical techniques, noise characterisation schemes, veto techniques for GW transients, bursts, continuous and stochastic sources, radiometric methods, …

– P. Ajith (Caltech, LIGO/TAPIR ? ) ……– Sukanta Bose (Faculty UW, USA ?)

Strong Indian presence in GW Astronomy with Global detector network Strong Indian presence in GW Astronomy with Global detector network broad international collaboration is the norm broad international collaboration is the norm relatively easy to get relatively easy to get people back.people back.

• Close interactions with Rana Adhikari (Caltech), B.S. Sathyaprakash (Cardiff), Sukanta Bose ( WU, Pullman) India ?, Soumya Mohanty (UTB), Badri Krishnan ( AEI) …

Logistics and Preliminary Plan• Assumption: Project taken up by DAE as a National Mega Flagship Project. All the persons mentioned who are currently working in their centers would be mainly in a supervisory role of working on

the project during the installation phase and training manpower recruited under the project who would then transition into the operating staff.

• Instrument Engineering: No manpower required for design and development activity. For installation and commissioning phase and subsequent operation

• Laser ITF: Unnikrishnan, Sendhil Raja, Anil Prabhaker. TIFR, RRCAT, IITM. 10 Post-doc/Ph.D students. Over 2-3 years. Spend a year at Advanced LIGO. 6 full time engineers and scientists. If project

sanctioned, manpower sanctioned, LIGO-India project hiring at RRCAT, TIFR, other insitututions/Labs.

42 persons (10 PhD/postdocs, 22 scientists/engineers and 10 technicians)

• Mobile Clean rooms: – Movable tent type clean rooms during welding of the beam tubes and assembly of the

system. Final building a clean room with AC and pressurization modules. SAC, ISRO. 1 engineer and 2 technicians to draw specs for the clean room equipments & installation.

• Vibration isolation system: 2 engineers (precision mechanical)– install and maintain the system. Sourced from BARC. RED (Reactor Engineering

Division of BARC) has a group that works on vibration measurement, analysis and control in reactors and turbo machinery.

• Electronic Control System: 4 Engineers – install and maintain the electronics control and data acquisition system.

Electronics & Instrumentation Group at BARC (G. P. Shrivastava’s group) and RRCAT.

– Preliminary training:six months at LIGO. Primary responsibility (installing and running the electronics control and data acquisition system): RRCAT & BARC. Additional activity for LIGO-India can be factored in XII plan if the approvals come in early.

Logistics and Preliminary Plans

… Logistics and Preliminary Plans Teams at Electronics & Instrumentation Groups at BARC may be interested in

large instrumentation projects in XII plan.• Control software Interface: 2 Engineers

– install and maintain the computer software interface, distributed networking and control system). RRCAT and BARC. Computer software interface (part of the data acquisition system) and is the “Human-machine-interface” for the interferometer. For seamless implementation man power to be sourced from teams implementing Electronic Control System.

• Site Selection & Civil Construction– BARC Seismology Division Data reg. seismic noise at various DAE sites to

do initial selection of sites and shortlist based on other considerations such as accessibility and remoteness from road traffic etc. DAE: Directorate of Construction, services and Estate Management (DCSEM): Co-ordinate design and construction of the required civil structures required for the ITF. 2 engineers + 3 technicians (design & supervision of constructions at site). Construction contracted to private construction firm under supervision of DCSEM.

LIGO-India vs. Indian-IGO ?Primary advantage: LIGO-India Provides cutting edge instrumentation &

technology to jump start GW detection and astronomy. Would require at least a decade of focused & sustained technology

developments in Indian laboratories and industry• 180 W Nd:YAG: 5 years;

– Operation and maintenance should benefit further development in narrow line width lasers. – Applications in high resolution spectroscopy, – precision interferometry and metrology.

• Input conditioning optics..Expensive..No Indian manufacturer with such specs• Seismic isolation (BCE,HAM) .. Minimum 2 of years of expt and R&D.

– Experience in setting up and maintaining these systems know how forisolation in critical experiments such as in optical metrology,AFM/Microscopy, gravity experiments etc.

• 10 interferometer core optics.. manufacturing optics of this quality and develop required metrology facility : At least 5 to 7 years ofdedicated R&D work in optical polishing, figuring and metrology.

• Five quadruple stage large optics suspensions systems.. 3-4 years of development.. Not trivial to implement.

– Benefit other physics experiments working at the quantum limit of noise.


LIGO labs LIGO-India• 180 W pre-stabilized Nd:YAG laser• 10 interferometer core optics (test masses, folding mirrors, beam splitter, recycling mirrors)• Input condition optics, including electro-optic modulators, Faraday isolators, a suspended mode-cleaner (12-m long mode-defining cavity), and suspended mode-matching telescope optics.

• 5 "BSC chamber" seismic isolation systems (two stage, six degree of freedom, active isolation stages capable of ~200 kg payloads)• 6 "HAM Chamber" seismic isolation systems (one stage, six degree of freedom, active isolation stages capable of ~200 kg payloads)• 11 Hydraulic External Pre-Isolation systems

• Five quadruple stage large optics suspensions systems• Triple stage suspensions for remaining suspended optics

• Baffles and beam dumps for controlling scattering and stray radiation• Optical distortion monitors and thermal control/compensation system for large optics• Photo-detectors, conditioning electronics, actuation electronics and conditioning

• Data conditioning and acquisition system, software for data acquisition• Supervisory control and monitoring system, software for all control systems• Installation tooling and fixturing

LIGO-India: Salient points of the megaproject

• On Indian Soil will draw and retain science & tech. manpower• International Cooperation, not competition LIGO-India success critical to the

success of the global GW science effort. Complete Intl support

• Shared science risk with International community Shared historical, major science discovery credit !!!

• AdvLIGO setup & initial challenge/risks primarily rests with USA. – AdvLIGO-USA precedes LIGO-India by > 2 years.– India sign up for technically demonstrated/established part (>10 yr of operation in initial LIGO ) 2/3

vacuum enclosure + 1/3 detector assembly split (US ‘costing’ : manpower and h/ware costs)– However, allows Indian scientist to collaborate on highly interesting science & technical challenges of

Advanced LIGO-USA ( ***opportunity without primary responsibility***)• Expenditure almost completely in Indian labs & Industry huge potential for

landmark technical upgrade in all related Indian Industry

• Well defined training plan core Indian technical team thru Indian postdoc in related exptal areas participation in advLIGO-USA installation and commissioning phase, cascade to training at Indian expt. centers

• Major data analysis centre for the entire LIGO network with huge potential for widespread University sector engagement.

• US hardware contribution funded & ready advLIGO largest NSF project, LIGO-India needs NSF approval but not additional funds

Advanced LIGO• Take advantage of new technologies and on-going R&D

>> Active anti-seismic system operating to lower frequencies:(Stanford, LIGO)

>> Lower thermal noise suspensions and optics : (GEO )

>> Higher laser power 10 W 180 W (Hannover group, Germany)

>> More sensitive and more flexible optical configuration: Signal recycling

• Design: 1999 – 2010 : 10 years of high end R & D internationally.

• Construction: Start 2008; Installation 2011; Completion 2015

1. Large scale ultra-high Vacuum enclosureS.K. Shukla (RRCAT),A.S. Raja Rao (ex RRCAT),


•To be fabricated by Industry with designs from LIGO. A pumped volume of 10000m3 (10Mega-litres), evacuated to an ultra high vacuum of 10-9 torr (pico-m Hg).

o Spiral welded beam tubes 1.2m in diameter and 20m length. o Butt welding of 20m tubes together to 200m length.

o Butt welding of expansion bellows between 200m tubes.

o Gate valves of 1m aperture at the 4km tube ends and the middle.

o Optics tanks, to house the end mirrors and beam splitter/power and signal recycling optics vacuum pumps.

o Gate valves and peripheral vacuum components. o Baking and leak checking


LIGO-G1100108-v1

HAM Chamber


1. Large scale ultra-high Vacuum enclosureS.K. Shukla (RRCAT),A.S. Raja Rao (ex RRCAT),


•To be fabricated by Industry with designs from LIGO. A pumped volume of 10000m3 (10Mega-litres), evacuated to an ultra high vacuum of 10-9 torr (pico-m Hg).

o Spiral welded beam tubes 1.2m in diameter and 20m length. o Butt welding of 20m tubes together to 200m length.

o Butt welding of expansion bellows between 200m tubes.

o Gate valves of 1m aperture at the 4km tube ends and the middle.

o Optics tanks, to house the end mirrors and beam splitter/power and signal recycling optics vacuum pumps.

o Gate valves and peripheral vacuum components. o Baking and leak checking


IndIGO 3m Prototype DetectorFunded by TIFR Mumbai on campus (2010)

PI: C. S. Unnikrishnan (Cost ~ INR 2.5 crore)

Vacuum tanksDetector

Laser table

Vibration isolationschematic

All mirros and beamsplitters are suspended as in the diagram on right

3.2 meters

0.8 mF-P cavityPower recycling

Sensing &Control

60 cm

180 cm

Mirror

ligo-india

Documents

initial ligo

advanced ligo suspensionsuk

advanced ligo laserdesigned

stan whitcombcourtesy

advligo laser

current indian capability

indian industry

high optical metrology