26th IAGRG Allahabad IndIGO Plans & Achievements Sanjeev Dhurandhar IUCAA, Pune
Dec 24, 2015
26th IAGRG Allahabad
IndIGOPlans & Achievements
Sanjeev Dhurandhar
IUCAA, Pune
26th IAGRG Allahabad20th January 2011
We did it ! LIGO, Virgo achieve design senstivity in initial phase
Advanced detectors being constructed to achieve an order of magnitude improve- ment – GW detections (if GR is correct)
LCGT (Japan) funded
GW detector network crucial for GW astronomy
Existing groups strongly favour more detectors!
GW heritage
26th IAGRG Allahabad
20 years of GW data analysis (IUCAA) and waveform modelling (RRI) at the top level
Strong substantial presence of ex-group members:
B. S. Sathyaprakash, Sukanta Bose, S. Mohanty + young group of GW experts + more in the wings+ strong support from other Indians Badri Krishnan (AEI), Rana Adhikari (Caltech)
26th IAGRG Allahabad
International Network of GW Interferometers
LIGO-LLO: 4km
LIGO-LHO: 2km, 4kmGEO: 0.6km VIRGO: 3km
TAMA: 0.3km
AIGO: site
India, Australia optimal global location for the next detector!
IndIGO Genesis
26th IAGRG Allahabad
Discussion on raised level of Indian GW initiative started in ICGC 2007 – Rana Adhikari, IUCAA postdocs, students
AISTF proposal on establishing Indo-Australian collaboration in
GW astronomy – Bala, Sanjeev, Unni, Tarun & D. Blair
Four meetings till date: Kochi, IUCAA, Shanghai & Perth
IUCAA: IndIGO consortium formed in August 2009 attended by Schutz, Blair, Sathyaprakash, Rana Adhikari
Shanghai: Meeting with all existing GW experimental groups LIGO, VIRGO, ACIGA etc – October 2009 International Advisory committee formed Clear about Indian experimental circumstances/limitations IndIGO proposal document prepared & circulated Perth: LIGO-Australia
Source localisation with a detector in Australia
26th IAGRG Allahabad
Compelling reason for LIGO-Australia&
for Indian participation in this
Members of IndIGO consortium
26th IAGRG Allahabad
1. S. V. Dhurandhar (IUCAA)2. B. R. Iyer (RRI)3. C. S. Unnikrishnan (TIFR)4. T. Souradeep (IUCAA)5. R. Adhikari (LIGO-Caltech)6. B. S. Sathyaprakash (Cardiff)7. K. G. Arun (CMI)8. B. Bhawal (USA)9. S. Bose (WSU)10. P. Dasgupta (DU)11. S. Doravari (LIGO-Caltech)12. A. Gopakumar (TIFR)13. R. Gupta (IUCAA)14. S. Jhingan (Jamia Millia)15. B. Krishnan (AEI)16. A. Kumar (IPR)
17. S. Mitra (JPL-LIGO)18. S. Mohanty (UTB)19. R. Nayak (IISER)20. A. Pai (IISER)21. A. Parmeswaran (LIGO-Caltech)22. G. Rajalakshmi (TIFR)23. T. Seshadri (DU)24. A. Sengupta ( DU)25. S. K. Shukla (RRCAT)
International Advisory Committee
26th IAGRG Allahabad
1. Rana Adhikari (LIGO, Caltech)2. David Blair (UWA)3. A. Giazotto (Virgo, Italy)4. P. D. Gupta (RRCAT)5. Jim Hough (GEO, Glasgow)6. K. Kuroda (LCGT, Japan)7. H. Lueck (GEO, Hannover)8. Nary Man (Virgo, France)9. Jay Marx (LIGO, director)10. David McClelland (ANU)11. Jesper Munch (ACIGA, Chair)12. B. S. Sathyaprakash (Cardiff)13. B. F. Schutz (AEI director, GEO)14. J-Y. Vinet (Virgo, France)15. Stan Whitcomb (LIGO, Caltech)
LIGO-Australia
26th IAGRG Allahabad
US and Australia to share roughly equal cost
Clear plan for Indian participation with Australia with help from LIGO
– strong LIGO interest in Indian participation
MOU with Australia
GWDA & source modelling will be the primary Indian deliverables
We expect clear data rights for GW data analysts in India- Data centre etc.
Bargaining power: Need to account for ~ 20% of Australian costs
High vacuum at end stations, control systems – tasks doable
Plans & Achievements
26th IAGRG Allahabad
LIGO will train Indian experimentalists on Advanced LIGO – they will be assigned installation & commissioning jobs in
LIGO- Australia – S. Doravari + …
Indo-US centre at IUCAA & Caltech funded: PIs T. Souradeep
R. Adhikari
Long term training in experiments
- 3 metre prototype at TIFR, Mumbai - Summer internships at Caltech, UTB, AEI(Hannover) 2010 programme very successful IISERs, NISER, IITs
Positive comments & inputs from Off. of Pr. Sc. Advisor R. Chidambram – (D. Bhawalkar – former director of CAT)
Plans & Achievements contd
26th IAGRG Allahabad
RRCAT committed to consultation in vacuum & lasers
- S. K. Shukla vacuum division head
- P. K. Gupta and Sendhil from lasers - A. S. Raja Rao retd from RRCAT – he designed
the vacuum system for large scale AIGO project in Australia
- Ajai Kumar & S. B. Bhatt already in progress
The 3 metre prototype
26th IAGRG Allahabad
People: Unnikrishnan (PI), Rajalakshmi, Jorge Fiscina
Time-scale: 2 ½ years
Budget: 0.6 million USD ~ Rs. 26,000,000 - FUNDED
Laboratory: TIFR, Mumbai may need to be shifted later to a quieter place.
Objectives: Manpower training, measurements related to short- range forces and Newtonian gravity.
Instrument: 3 m arm-length Michelson interferometer with Fabry- Perot enhancement.
Sensitivity: In actual operation ~ 5x10-18 m/√Hz above 200 Hz (not aiming for theoretical minimum).
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
6 m6 m
26th IAGRG Allahabad20th January 2011
Frequency (Hz)
1 10 100 1000
10-20
10-19
10-18
10-17
10-16
10-15
10-14
Shot noise
Seismic (best and worst case, dashed)
( / )l m Hz
10000Signal recycling + Squeezing
Something worth progressing to…
SQL
Sketch of expected sensitivity for 3-m prototype
Best case total
suspension noise
26th IAGRG Allahabad20th January 2011
Manpower Training: IndIGO school at Delhi IRC
26th IAGRG Allahabad
GRAND SUCCESS!IndIGO school on Gravitational Wave Astronomy held at Delhi University from 13-24 December 2010.
• Coordinators: Seshadri & Sengupta + SVD
• Theory, Data Analysis & Experiment
• Lecturers included: Alan Weinstein (Caltech) B. S. Sathyaprakash (Cardiff) C. S. Unnikrishnan (TIFR) SVD (IUCAA)
• Students from IITs, IISERs, Universities
• IndIGO summer internships at international GW laboratories: 6 students Caltech, UTB (2010) – plans to include other groups
The first IndIGO School
26th IAGRG Allahabad
26th IAGRG Allahabad
Meeting in February 2011 in Delhi – to finalise Indo- Australian collaboration in LIGO-Australia
Funding proposal by Australia and India for LIGO- Australia (2011 – 2017) + operation
Centre for GW Data Analysis
Vigorous programme envisaged in GW Astronomy in the next 6-10 years – more experimental manpower
Future Directions
26th IAGRG Allahabad
The Experimental Program: Road Map
1) 3 meter scale prototype interferometer with power recycling and displacement sensitivity of 10-18 m/√Hz above 300 Hz
Funded (TIFR)(2011-14)
2) Add signal recycling and squeezed light to match the best of prototypes
Funded (2015)
3) Leverage Indo-US and Indo-Australian exchange programs to develop specific expertise in vibration isolation, optical cavities and data handling techniques
Indo-US funded (2011-2014)Indo-Aus. under review
4) Project proposal (Rs. 130 Crores over 8 years) being prepared for participation in LIGO-Australia (participation in vacuum systems, control systems, data handling and data analysis, part from tests and validation). Detector to be built during 2012-2017 with LIGO components and design
To be submitted synchronous with Australian proposal to their Govt. this year.
5) Envisage a vigorous GW detection and astronomy program after 6-8 years. But more people to get interested and volunteer for the experimental program.
Will also aid in experiments in short range gravity and Casimir force measurements with unprecedented sensitivity: (G. Rajalakshmi and CS Unnikrishnan, CQG, 2011)
26th IAGRG Allahabad20th January 2011
26th IAGRG Allahabad
Features: 1) 3 m arm-length Michelson interferometer with Fabry-Perot enhancement, mirror
size of 15 cm.2) Finesse of F-P cavity ~ 3003) Laser power input: ~ 1 W, frequency and amplitude stabilized NPRO Nd:YAG
laser or Fiber amplifier enhanced seed NPRO. 4) Power recycling: Yes5) Signal recycling: to be decided6) Squeezed light: Planned for later (part of the training feature, will be developed
and implemented separately in our optics lab).7) Vibration isolation: Passive 3-stage, to reach <10-18 m above 200 Hz.8) Vacuum: 10-8 mbar, 3 ion pumps and NEG pumps.9) Mode cleaner: Fiber based.10) Sensitivity in actual operation ~ 5x10-18 m/√Hz above 200 Hz (not aiming for
theoretical minimum). 11) Time scale for completion: 2.5 years12) Laboratory: TIFR, Mumbai, to be shifted to a quieter place later (Hyderabad or
Pune).13) Budget (hopeful, in 2010): ~ 0.6 million US$14) Applications: Training, and measurements related to short-range forces and
Newtonian gravity.
26th IAGRG Allahabad
Formation of the consortium for IndIGO
People from several important institutes have come together
to form a consortium – TIFR, RRI, IUCAA, CMI, DU, IISERs, …
The aim of the consortium is to promote and foster
Indian Initiative in Gravitational Wave Astronomy
Set up the roadmap and a phased strategy towards the
Indian Interferometric Gravitational-wave Observatory (IndIGO)
20th January 2011
26th IAGRG Allahabad
The Road Map for IndIGO
3 metre scale prototype : Current
C. S. Unnikrishnan & group at T.I.F.R.
Collaboration with LIGO - Australia: Current
Ranjan Gupta (IUCAA), Ajai Kumar (IPR),
Unnikrishnan (TIFR), RRCAT
IndIGO document submitted to directors + other VIP
20th January 2011
The sub-committees
26th IAGRG Allahabad
• Council: B. Iyer (Chair), S. Dhurandhar (spokesperson), C. S. Unnikrishnan & T. Souradeep
• 3 metre: C. S. Unnikrishnan, G. Rajalakshmi & S. Doravari
• AIGO deliverables: A. Kumar, R. Gupta & C. S. Unnikrishnan
• LSC related: S. Dhurandhar, A. Pai & R. Nayak
• IndIGO homepage: A. Sengupta, S. Mitra, A. Parmeswaran , K. G. Arun & T. Souradeep
• Workshops/Schools: T. Souradeep, T. Seshadri, Gopakumar, R. Nayak & A. Pai
• Communications: same as IndIGO homepage
Indo-US centre for Gravitational Physics and Astronomy
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• Project of 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 US: Caltech, WSU - PI: Rana Adhikari
APPROVED/FUNDED !
Key aspects of vacuum and control systems for LIGO Australia
26th IAGRG Allahabad
• MOU with Australia signed
• People: Ranjan Gupta, Ajai Kumar & C. S. Unnikrishnan, A. S. Raja Rao (formerly CAT)
• Feasibility and cost estimate on the basis of LIGO system is being worked out with Hind High Vacuum company,
Bangalore.
• Meeting in Delhi with LIGO and Australians in February 2011 to plan the future steps and deliverables from India
• Indo-Australian exchange grant: Unnikrishnan & Blair
Organisation & Sub-committees of IndIGO consortium
26th IAGRG Allahabad
Council
AIGO deliverables
3 m prototype
LSC IndIGOhomepage
Workshops Schools
Communication Documentation