Gravitational Physics Program

Transcription

1 Gravitational Physics Program Status of Virgo, ET and LISA Jo van den Brand Nikhef Annual Meeting 2011, Amsterdam, December 12, 2011;

2 Scientific focus To Detect and Observe Gravitational Waves

3 Scientific promise Scientific focus To Detect and Observe Gravitational Waves Direct discovery of gravitational waves Fundamental tests GR, BH uniqueness theorem, Cosmography Signals from the early Universe R.A. Hulse and J.H. Taylor Jr (1993)

4 Scientific promise Scientific focus To Detect and Observe Gravitational Waves Direct discovery of gravitational waves Fundamental tests GR, BH uniqueness theorem, Cosmography Signals from the early Universe Sources exist Binary systems of black holes and neutron stars Signal shape known in GR templates Strong analysis group in place R.A. Hulse and J.H. Taylor Jr (1993)

5 Scientific promise Scientific focus To Detect and Observe Gravitational Waves Direct discovery of gravitational waves Fundamental tests GR, BH uniqueness theorem, Cosmography Signals from the early Universe Sources exist R.A. Hulse and J.H. Taylor Jr (1993) Binary systems of black holes and neutron stars Signal shape known in GR templates Strong analysis group in place Bundle existing strengths (astro)particle physics: experiment and theory Astrophysics, astronomy and cosmology Multi-disciplinary activity

6 GW staff Full time senior staff Senior staff Gerhard Alessandro Raven Bertolini UHD Jo van den Brand Postdocs Chris Van Den Broeck Henk Bulten Thomas Bauer Engineers Tjeerd Ketel Jan Willem van Holten David Rabeling Walter Del Pozzo Salvatore Vitale Martin Doets Eric Hennes PhD students Frans Mul Fred Schimmel Michalis Agathos Giuseppe d Ambrosi Mark Beker Mathieu Blom Reinier Jonker Gideon Koekoek Tjonnie Li Sipho van der Putten

7 GW staff Full time senior staff Senior staff Gerhard Alessandro Raven Bertolini UHD Jo van den Brand Postdocs Chris Van Den Broeck Henk Bulten Thomas Bauer Engineers Tjeerd Ketel Jan Willem van Holten David Rabeling Walter Del Pozzo Salvatore Vitale Martin Doets Eric Hennes PhD students Frans Mul Fred Schimmel Michalis Agathos Giuseppe d Ambrosi Mark Beker Mathieu Blom Reinier Jonker Gideon Koekoek Tjonnie Li Sipho van der Putten

8 GW staff Full time senior staff Senior staff Gerhard Alessandro Raven Bertolini UHD Jo van den Brand Postdocs Chris Van Den Broeck Henk Bulten Thomas Bauer Engineers Tjeerd Ketel Jan Willem van Holten David Rabeling Walter Del Pozzo Salvatore Vitale Martin Doets Eric Hennes PhD students Frans Mul Fred Schimmel Michalis Agathos Giuseppe d Ambrosi Mark Beker Mathieu Blom Reinier Jonker Gideon Koekoek Tjonnie Li Sipho van der Putten

9 GW staff Full time senior staff Senior staff Gerhard Alessandro Raven Bertolini UHD Jo van den Brand Postdocs Chris Van Den Broeck Henk Bulten Thomas Bauer Engineers Tjeerd Ketel Jan Willem van Holten David Rabeling Walter Del Pozzo Salvatore Vitale Martin Doets Eric Hennes PhD students Frans Mul Fred Schimmel Michalis Agathos Giuseppe d Ambrosi Mark Beker Mathieu Blom Reinier Jonker Gideon Koekoek Tjonnie Li Sipho van der Putten

10 Output in refereed publications (10 by Nikhef authors) 20 talks

11 Output in refereed publications (10 by Nikhef authors) 20 talks

12 Output in refereed publications (10 by Nikhef authors) 20 talks

13 Output in refereed publications (10 by Nikhef authors) 20 talks

14 Output in refereed publications (10 by Nikhef authors) 20 talks

15 15 A few highlights Amaldi 2011 Tjonnie Li, Coalescing binary neutron stars and black holes as laboratories for testing general relativity [plenary talk] Walter Del Pozzo, Precision measurements of the Hubble constant with gravitational waves [parallel talk] Jo van den Brand, Gravity Gradient Noise [plenary talk] Tania Regimbau, A Mock Data Challenge for Einstein Telescope [plenary talk] (co-authors: Del Pozzo, Li, Van Den Broeck) Numerical Relativity Data Analysis, NRDA 2011 Salvatore Vitale, Effect of detectors' calibration errors on parameter estimation of gravitational waves from inspiral compact binaries [plenary talk] International Conference on Gravitation and Cosmology, ICGR 2011 Chris Van Den Broeck, GW astronomy with ET [invited speaker] Tjonnie Li, Binary black holes as labs for Testing GR [parallel]

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17 Virgo interferometer Virgo project Interferometer with 3 km arms Initial investment of M 77 (M 151 including staff) by CNRS and INFN First proposal: May 1989 Agreement signed by CNRS and INFN: June 1994 Operational since May 2008 Nikhef joined Virgo in 2007 Joined EGO Council in 2009

18 Interferometers sensitivity The horizon (best orientation) for a binary system of two neutron stars is 22 Mpc and of two 10 solar mass black holes is 110 Mpc

19 Direct discovery of GW Advanced Virgo Improve sensitivity by factor 10 Probable sources Binary neutron star coalescence Binary black holes mergers, supernovae, pulsars BNS Rates: (most likely and 95% interval) Astronomy: we know GW sources exist! Initial Virgo (30Mpc) 1/100yr (1/500-1/25 yr) Advanced detectors (350Mpc) 40/yr (8-160/yr) Kalogera et al; astro-ph/ ; Model 6 BBH more difficult to predict

20 International context LISA NASA withdraw Due to NASA budget outlook and to the astro2010 decadal rankings ESA and New Gravitational wave Observatory ESA is now developing a redesigned European-only GW mission, NGO ESA technical and programmatic review starting in November 2011 SPC downselection for entering phase A/B1 in February 2012 LISA Pathfinder is planned for 2014 See

21 International context LISA NASA withdraw Due to NASA budget outlook and to the astro2010 decadal rankings ESA and New Gravitational wave Observatory ESA is now developing a redesigned European-only GW mission, NGO ESA technical and programmatic review starting in November 2011 SPC downselection for entering phase A/B1 in February 2012 LISA Pathfinder is planned for 2014 See Einstein Telescope Conceptual Design Report completed in June 2011 See EU funding via approved ELiTES proposal ELiTES Japanese-European collaborative FP7 project, between ET and LCGT

22 International context LISA NASA withdraw Due to NASA budget outlook and to the astro2010 decadal rankings ESA and New Gravitational wave Observatory ESA is now developing a redesigned European-only GW mission, NGO ESA technical and programmatic review starting in November 2011 SPC downselection for entering phase A/B1 in February 2012 LISA Pathfinder is planned for 2014 See Einstein Telescope Conceptual Design Report completed in June 2011 See EU funding via approved ELiTES proposal ELiTES Japanese-European collaborative FP7 project, between ET and LCGT ASPERA Roadmap 2011 GW are number 1 medium-term priority We urge the agencies to continue substantially supporting the on-going and planned upgrades to advanced detectors See

23 National context National GW meeting Overview and discussions NWO Large Under review Astrophysics at RU CAN Discussions on joining Virgo New Strategic Plan Last plan from 2006 Advanced Virgo

24 Advanced Virgo PROJECT GOALS Upgrade Virgo to a 2 nd generation detector. Sensitivity: 10x better than Virgo Be part of the 2 nd generation GW detectors network. Timeline: in data taking with Advanced LIGO Nikhef Cryolinks Seismic attenuation systems Linear alignment and phase camera s

25 Cryolinks Phase noise cryolinks Vibrationless two-phase flow Prototype under construction 1.2 m

26 External injection bench SAS features Single-stage attenuation system Six degrees of freedom Sensors: 6 accelerometers, 6 LVDTs Consistent with10-12 m/rthz Compact design Installation ongoing

27 Seismic attenuation systems SAS features SAS 1 external, 5 internal SAS Consistent with10-15 m (rad)/rthz (6 dof) Compact design Vacuum compatible LB EIB SAS SAS

28 Linear alignment systems Angular control of optical elements Modulate carrier 6.26, 8.35, 56 and 131 MHz QPD front-end systems Transimpedance amplifiers Shot noise limited performance Demodulation electronics Seismic attenuation systems 160 MHz prototype demodulation board (Han Voet, VU Amsterdam)

29 Phase camera s Imaging of cavity fields Both carrier and sidebands 6.26, 8.35, 56 and 131 MHz Amplitude and phase High speed imaging of HOM Avoid moving parts (CCD based) AdV optical design: MSRC Main diagnostics for Advanced Virgo Input for Thermal Compensation Systems Credits: David Rabeling

30 Summary An efficient, responsive and light structure to support Virgo and promote European collaboration under supervision by national institutions EGO existence relies on Virgo/AdV success The future of GW in Europe depends upon a stronger collaboration between EU countries. EGO may prefigure the required infrastructure. Advanced VIRGO