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The IndIGO Project. Sanjeev Dhurandhar. 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 - PowerPoint PPT Presentation
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IAGRG, HRI, Allahabad 20th January 2011
The IndIGO Project
Sanjeev Dhurandhar
IAGRG, HRI, Allahabad 20th January 2011
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)
IAGRG, HRI, Allahabad 20th January 2011
International Network of GW Interferometers
LIGO-LLO: 4km
LIGO-LHO: 2km, 4kmGEO: 0.6km VIRGO: 3km
TAMA: 0.3km
AIGO: (?)km
1. Detection confidence 2. Source direction 3. Polarisation info
IAGRG, HRI, Allahabad 20th January 2011
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
Members of IndIGO consortium
IAGRG, HRI, Allahabad 20th January 2011
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)
International Advisory Committee
IAGRG, HRI, Allahabad 20th January 2011
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)
Organisation & Sub-committees
IAGRG, HRI, Allahabad 20th January 2011
Council
AIGO deliverables
3 m prototype
LSC IndIGOhomepage
Workshops Schools
Communication Documentation
The sub-committees
IAGRG, HRI, Allahabad 20th January 2011
• 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
The 3 metre prototype
IAGRG, HRI, Allahabad 20th January 2011
People: Unnikrishnan (PI), Rajalakshmi, Jorge Fiscina
Time-scale: 2 ½ years
Budget: 0.6 million USD ~ Rs. 26,000,000 - FUNDED
Laboratory: TIFR, Mumbai to be shifted later to a quieter place Hyderabad/Pune.
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).
Indo-US centre for Gravitational Physics and Astronomy
IAGRG, HRI, Allahabad 20th January 2011
• 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
IAGRG, HRI, Allahabad 20th January 2011
• 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
Manpower Training: IndIGO school at Delhi IRC
IAGRG, HRI, Allahabad 20th January 2011
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
IAGRG, HRI, Allahabad 20th January 2011
IAGRG, HRI, Allahabad 20th January 2011
30 metre class prototype: 2014-2015 (?)
Advanced detector IndIGO: 2020+
Future Directions
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
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
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)
IAGRG, HRI, Allahabad 20th January 2011
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.