An Indo-US joint mega-project concept proposal LIGO-India An Indo-US joint mega-project concept proposal IndIGO Consortium (Indian Initiative in Gravitational-wave Observations) Version: pII_v2 Jun 20, 2011 : TS www.gw-indigo.org

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

Schematic Optical Design of Advanced LIGO detectors Reflects International cooperation Basic nature of GW Astronomy LASER AEI, Hannover Germany Suspension GEO, UK

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

Courtesy: Stan Whitcomb Advanced LIGO Laser Designed and contributed by Albert Einstein Institute, Germany Much higher power (to beat down photon shot noise) 10W  180W Better stability 10x improvement in intensity and frequency stability Courtesy: Stan Whitcomb

Courtesy: Stan Whitcomb Advanced LIGO Mirrors Larger size 11 kg -> 40 kg Smaller figure error 0.7 nm -> 0.35 nm Lower absorption 2 ppm -> 0.5 ppm Lower coating thermal noise All substrates delivered Polishing underway Reflective Coating process starting up Courtesy: Stan Whitcomb

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 Courtesy: Stan Whitcomb

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 Pendulum Q ~105  ~108 Suppression at 10 Hz : ? at 1 Hz : ? 40 kg silica test mass four stages 9 Courtesy: Stan Whitcomb

“Quantum measurements” to improve further via squeezed light: LIGO-India: unique once-in-a-generation opportunity “Quantum measurements” to improve further via squeezed light: New ground for optical technologists in India High Potential to draw the best Indian UG students typically interested in theoretical physics into experimental science !!!

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 for isolation 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 of dedicated 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-India: Expected Indian Contribution Indian contribution in infrastructure: Ultra-high Vacuum enclosure on large scale (1.) Site (L-configuration: Each 50-100 m x 4.2 km) (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

1. Large scale ultra-high Vacuum enclosure S.K. Shukla (RRCAT),A.S. Raja Rao (ex RRCAT), S. Bhatt (IPR), Ajai Kumar (IPR) To be fabricated by IndIGO with designs from LIGO. A pumped volume of 10000m3 (10Mega-litres), evacuated to an ultra high vacuum of 10-9 torr (pico-m Hg). Spiral welded beam tubes 1.2m in diameter and 20m length. Butt welding of 20m tubes together to 200m length. Butt welding of expansion bellows between 200m tubes. Gate valves of 1m aperture at the 4km tube ends and the middle. Optics tanks, to house the end mirrors and beam splitter/power and signal recycling optics vacuum pumps. Gate valves and peripheral vacuum components. Baking and leak checking

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 stainless 50 km of weld NO LEAKS !! IndIGO - ACIGA meeting

Beam Tube Construction transport beamtube install Concrete Arches girth welding IndIGO - ACIGA meeting

LIGO beam tube enclosure minimal enclosure reinforced concrete no services IndIGO - ACIGA meeting

LIGO Vacuum Equipment IndIGO - ACIGA meeting

Large scale ultra-high Vacuum enclosure Fabricated and installed by Indian Industry under close monitoring by science & technology team 5 Engineers and 5 technicians Oversee the procurement & fabrication of the vacuum system components and its installation. If the project is taken up by DAE then participation of RRCAT & IPR is more intense All vacuum components such as flanges, gate-valves, pumps, residual gas analyzers and leak detectors will be bought. Companies L&T, Fullinger, HindHiVac, Godrej with support from RRCAT, IPR and LIGO Lab. Preliminary detailed discussions with Industry in Feb 2011 : Companies like HHV, Fullinger 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. (S K Shukla)

Detector Installation using Cleanrooms Chamber access through large doors IndIGO - ACIGA meeting

HAM Chamber IndIGO - ACIGA meeting

Optics Installation Under Cleanroom Conditions IndIGO - ACIGA meeting

2. Detector assembly, installation & commissioning No manpower required for design and development activity !!! For installation and commissioning phase: Identify 10-15 core scientists (postdoctoral) who spend a year, or more, at Advanced LIGO-USA during its install. & comm. LIGO proposal doc Already 1 IndIGO postdoc at LIGO Caltech, another under considerstion in LIGO and EGO 6 full time engineers and scientists in India. If project sanctioned, manpower sanctioned, LIGO-India project hiring required at institutions like RRCAT, TIFR, IUCAA,…. Present expertimental expertise within IndIGO Laser ITF: Unnikrishnan (TIFR), Sendhil Raja (RRCAT), Anil Prabhaker. (IITM), Pradeep kumar (IIT K) . Can scale to 10 Post-doc/Ph.D students. Over 2-3 years. Train on 3-m prototype too. UH Vacuum: S.K. Shukla (RRCAT),A.S. Raja Rao (ex RRCAT), S. Bhatt (IPR), Ajai Kumar (IPR)  

LIGO-India: … the challenges 3. Manpower generation for sustenance of LIGO-India : Preliminary Plans & exploration Since Advanced LIGO will have a lead time, participants will be identified who will be deputed to take part in the commissioning of Advanced LIGO and later bring in the experience to LIGO-India. They will start building groups with associated training program. Successful IndIGO Summer internships in International labs underway High UG applications 30/40 each year from IIT, IISER, NISERS,.. 2 summers, 10 students, 1 starting PhD at LIGO-MIT Plan to extend to participating National labs to generate more experimenters IndIGO schools are planned annually to expose students to emerging opportunity in GW science 1st IndIGO school in Dec 2010 in Delhi Univ. (thru IUCAA) Post graduate school specialization courses , or more Jayant Narlikar: “Since sophisticated technology is involved IndIGO should like ISRO or BARC training school set up a program where after successful completion of the training, jobs are assured.”

Indo-US centre for Gravitational Physics and Astronomy APPROVED for funding (Dec 2010) Centre of the Indo-US Science and Technology Forum (IUSSTF) 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

Indian Site Preliminary exploration: low seismicity LIGO-India: … the challenges Requirements: Low seismicity Low human generated noise Air connectivity, Proximity to Academic institutions, labs, industry Preliminary exploration: IISc new campus & adjoining campuses near Chitra Durga low seismicity 1hr from Intl airport Bangalore: science & tech hub National science facilities complex plans  power and infrastructure availablity

IndIGO Data Centre@IUCAA Anand Sengupta, DU, IndIGO 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 GWdata and analysis Bring together data-analysts within the Indian gravity wave community. Puts IndIGO on the global map for international collaboration with LIGO Science Collab. wide facility. Part of LSC participation from 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

LIGO-India: … the challenges Organizational National level DST-DAE Consortium Flagship Mega-project Identify a lead institution and agency Project leader Construction: 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 specs Train 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 commissioning Data centre

LIGO-India: Project team requirements LIGO-India: … the challenges LIGO-India: Project team requirements LIGO-India Director Project manager Project engineering staff: Civil engineer(s) Vacuum engineer(s) Systems engineer(s), Mechanical engineers Electronics engineers Software engineers Detector leader Project 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)

LIGO-India: Action points If accepted as a National Flagship Mega Project under the 12th plan then… Seed Money Identification of 3-6 project leaders Detailed Project Proposal Site identification 1st Staffing Requirement meeting Aug 1-15 2nd Joint Staffing Meeting with LIGO-Lab Vacuum Task related team and plans

Concluding remarks on LIGO India 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 relativity” An unique once-in-a-generation opportunity for India. India could play a key role in Intl. Science by hosting LIGO-India. Deserves a National mega-science initiative Thank you !!! “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. )

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.  

Logistics and Preliminary Plans 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 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.