Global projects in Astrophysics for India
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1 Global projects in Astrophysics for India INSA Anniversary meeting 27 December 2017 Somak Raychaudhury Inter-University Centre for Astronomy and Astrophysics, Pune
2 LIGO-India 2
3 Gravitational Waves 40 authors from Indian institutions in discovery paper Detection of Gravitational Waves received the top awards in science, marking a glorious beginning of Gravitational Wave Astronomy LIGO-India is a great opportunity for science, human resource development and technology spin-offs. Needs urgent funding to enable setting up of related theoretical and experimental groups and laboratories in the institutions and universities. 3
4 GW Spectrum: Sources & Detectors 4
5 LIGO-India A Mega-Science project on Indian Soil Indian observatory: setup, commission & operate. [Lead institutes: IPR,IUCAA, RRCAT] Fundamental Discovery of Einstein s messengers: LIGO-India GW Astronomy New window to the Universe! Strategic geographical advantage on India, Demographic advantage of India Global cooperation, not competition Joint venture with LIGO Lab. USA (Caltech, MIT) High end Science Technology and Engineering. Transformational for Indian capabilities and high tech skills enabling cutting edge work in photonics, lasers & vacuum technology) Industrial Connection
6 LIGO-India Stakeholders Indo-US collaboration Funding agencies: NSF (USA) and jointly DAE (India) & DST (India) Institutions: LIGO Lab., Caltech & MIT (USA), together with 1. Inter-University Centre for Astronomy & Astrophysics (IUCAA), Pune 2. Institute for Plasma Research (IPR), Gandhinagar 3. Raja Ramanna Centre for Advanced Technology (RRCAT), Indore 4. Directorate of Construction, Services and Estate Management (DCSEM), Mumbai Last three affiliated to Dept of Atomic Energy, India LIGO-G
7 LIGO-India preferred site 7
8 8 LIGO-India preferred site
9 Highly Multi-disciplinary project
10 Emerging Research themes (in the building phase) Squeezed light technology: US LIGO observatories will soon introduce squeezed light in the vacuum port to improve SNR. Improved Mirror coating : Thermal noise of the mirror coatings are expected to become the limiting source of noise in the mid frequency band. LI must participate in this global challenge with LSC Advanced Optics & Laser technology: Fiber based approach to High power stabilised laser solutions, future cryogenic silicon optics, scatter losses in mirrors. Control Systems Mitigating Newtonian Gravity noise: Direct gravitational coupling between moving ground mass and the test masses, a.k.a., Newtonian Noise (NN). Precise measurements of seismic waves, online/offline adaptive noise cancellation Wind loading noise on LIGO-India building structure: Variable tilt introduces on the building foundation to strong gusts of wind 10
11 LIGO-India Science buildup 11 Series of meetings at IUCAA to build LI S&T community 4 meetings in 2016, more coming International experts: Rana Adhikari (Caltech US), Giles Hammond (Glasgow UK), Kiwamu Izumi (LIGO-Hanford US), Brian Lantz (Stanford U, US), David McClelland (ANU, Aus.), Benno Willke (AEI-Hannover, Germany) Brett Shapiro (Stanford U., US) Andreas Friese (U. Birmingham, UK) Indian Institutions: IUCAA, IPR, RRCAT, IIT Madras, IIT Delhi, IIT Kanpur, IISER Pune, IISER Tvm, IISER Kolkata, TIFR Mumbai, TIFR Hyderabad, ICTS-TIFR, Physical Research Lab., National Physical Laboratory, Univ. of Pune & Nanded, SINP Kolkata,
12 Thirty Meter Telescope 12
13 USA: Segments, Polishing, Civil Works, instruments TMT Observatory: Partners Canada: Dome, AO systems, instruments Japan:Telescope Structure, Segment Blanks, segments instruments India : M1 Control system, Software, segments Instruments China: tertiary mirror(m3) Na GS laser launching, Segments, instruments 13 S. Raychaudhury, IUCAA
14 TMT-India: Partners DST-DAE funding: DST Leading TMT-India HQ at Indian Institute of Astrophysics, Bengaluru Three lead institutes: IIA Bengaluru, IUCAA Pune, ARIES Naini tal Over 20 more Institutes and Universities currently involved TMT International Science Meet held in Mysuru in Nov 2017
15 Segment Support Assembly Prototypes of SSA and actuators are being made at Avasarala Technologies, Bengaluru and Godrej & Boyce, Mumbai S. Raychaudhury, IUCAA 15
16 Indian Role S. Raychaudhury, IUCAA 16
17 Thirty Metre Telescope Construction permit for Mauna Kea cancelled by the Hawaii supreme court on technical grounds Permit re-acquiring process is in progress Mauna Kea remains TMT s preferred site, back up site is La Palma, Spain- this is now being vigorously pursued However, work is progressing in all partner countries In India TCS, OSW, segment support assembly, actuators etc. are being prototyped and design iterations are in progress at IIA Bengaluru and at IUCAA
18 Science team buildup LIGO-India: The Road Ahead Series of meetings at IUCAA to build LI S&T community 1 st meeting: Aug 16-18, nd meeting: Dec 19-21, rd meeting: Mar 27-28, th meeting: May 15-16, 2017 International experts: Rana Adhikari (Caltech), Andreas Friese (U. Birmingham) Giles Hammond (Glasgow), Kiwamu Izumi (LIGO-Hanford), Brian Lantz (Stanford), Tjonnie Li (CU Hong Kong) David McClelland (ANU) Fred Raab (LIGO, Hanford) David Reitze (LIGO, Caltech) Peter Saulson (Syracuse) B.S. Sathyprakash (Penn State) Brett Shapiro (Stanford) L. Singer (NASA Goddard) LIGO-G Benno Willke (AEI-Hannover) Indian Institutions: IUCAA, IPR, RRCAT, IIT Madras, IIT Delhi, IIT Kanpur, IISER Pune, IISER Tvm, IISER Kolkata, TIFR Mumbai, TIFR Hyderabad, ICTS-TIFR, Physical Research Lab., National Physical Laboratory, Univ. of Pune & Nanded, SINP Kolkata,
19 Square Km Array and India Slides mainly from Yashwant Gupta, NCRA-TIFR, Pune
20 The Square Kilometre Array The SKA is the most ambitious Radio Astronomy project ever attempted 1 square km (1,000,000 sq m) collecting area (~ 30 x GMRT!) ~ 3000 small sized antennas, with larger field of view High resolution antennas spread out over distances up to 3000 km, but connected in realtime (by optical fibre) Wide frequency range: 70 MHz - 10 GHz Location : Australia AND South Africa (radio quiet regions, far away from human habitat)) Radio telescope sensitivities over the years
21 SKA Technologies Receptor stations spread out over a region of 3000 km; highly compact & dense central core region Multiple detector technologies to cover the large frequency range : dishes (high frequency), sparse & dense aperture arrays (low & mid frequencies) Extensive optical fibre network (petabits/sec ) : > total internet traffic) State of the art low noise electronics & real-time signal processing Supercomputing capability (petaflops) for post processing requirements
22 Science with the SKA Cosmic Dawn & EoR : direct imaging of the earliest structures Cosmology & Dark Energy : primordial non-gaussianity, super-horizon scales and the matter dipole Galaxy Evolution (via Radio Continuum and Neutral Hydrogen) : star formation rates, resolved gaseous disks and angular momentum growth; The Origin and Evolution of Cosmic Magnetism : what generates the magnetic fields in space? ; the role of magnetism in galaxy evolution The Transient Radio Sky : Fast Radio Bursts as cosmological probes Strong-field Tests of Gravity with Pulsars & Black Holes : gravity waves & fundamental physics; was Einstein right?
23 SKA Phase I Full SKA is a very ambitious project; for ease of implementation, it has been split into phases SKA Phase I : ~ 10% of full SKA Frequency coverage : 70 MHz to 3 (10) GHz Max baseline : 150 km All infrastructure and designs to keep in mind the full SKA Two sites : Australia (SKA-low) and South Africa (SKA-mid) Global HQ : Jodrell Bank (UK) Detailed design & definition phase : (~ 110 M Euros) Construction phase : (~ 650 M Euros; Rs 4500 cr)
24 SKA-MID : Karoo, South Africa Phase 1: m dishes spread over 150 km ( ) Phase 2: 2500 dishes spread over 3500 km ( ) The Karoo 800 km north of Cape Town Radio quiet protected by Astronomy Advantage Act Building on MeerKAT
25 SKA-LOW : Murchison, Australia Phase 1: 130,000 dipole antennas over 80 km ( ) Phase 2: 500,000 dipoles over 250 km ( ) Murchison Desert 800 km north of Perth Very low popn density Radio quiet zone protected by ACMA ASKAP & MWA precursors
26 SKA-I : Members
27 Indian Participation in SKA India has been involved in the SKA Project since the early days of thinking & planning; and is a Full Member of the SKA Organisation. NCRA is the nodal organisation and DAE is the nodal ministry The GMRT has the status of a SKA pathfinder facility Main aspects of Indian participation in SKA, at present, are : Participation in technical design phase of SKA-I (and plans for contribution to construction phase of SKA-I) Involvement in SKA Pathfinders : technical and science aspects Preparing for science with the SKA Developing required technical and scientific manpower : training and outreach Present activities are coordinated by the SKA India Consortium
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