26th IAGRG Allahabad. 20th January 201126th IAGRG Allahabad We did it ! LIGO, Virgo achieve design senstivity in initial phase Advanced detectors

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


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)


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


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


Compelling reason for LIGO-Australia&

for Indian participation in this

Members of IndIGO consortium


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


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


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


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


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


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


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


Manpower Training: IndIGO school at Delhi IRC


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



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


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)



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.


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


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


• 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


• 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


• 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


Council

AIGO deliverables

3 m prototype

LSC IndIGOhomepage

Workshops Schools

Communication Documentation

Documents

26th IAGRG Allahabad. 20th January 201126th IAGRG Allahabad We did it ! LIGO, Virgo achieve design senstivity in initial phase Advanced detectors