Institute for Gravitation and the Cosmos Inaugural Conference August 9 – 11, 2007 Penn State University Gravitational Wave Research in Hannover and Potsdam
Peter Aufmuth Albert-Einstein-Institut Leibniz Universität Hannover
LIGO Scientific SFB/TR 7 Collaboration Max Planck Society „GW-Astronomie“ Albert Einstein Institute
Experiment Theory Leibniz Universität Hannover Max-Planck-Institut für Gravitationsphysik Max-Planck-Institut Golm/Potsdam für Gravitationsphysik Hannover Evaluation of data; Gravitational wave calculation of sources detector GEO600
R&D for the next generation of gw detectors
ALBERT-EINSTEIN-INSTITUT HANNOVER Albert Einstein Institute
Hannover Golm / Potsdam
Karsten Danzmann B. Allen G. Huisken B.F. Schutz H. Nicolai
Institute for Laser Inter- Observational Geometric Quantum Astrophysical Gravitational ferometry & Relativity & Analysis & Gravity & Relativity Physics GW Astronomy Cosmology Gravitation Unified Theories
Leibniz University Hannover Max Planck Institute for Gravitational Physics (AEI)
ALBERT-EINSTEIN-INSTITUT HANNOVER Astrophysical Relativity
Numerical solutions of Einstein’s equations theoretical modelling of GW sources special interest: evolution of binary black holes set-up of large-scale cluster computing facilities
MERLIN
ALBERT-EINSTEIN-INSTITUT HANNOVER GW Data Analysis
M.A. Papa chair of LIGO continuous waves working group Einstein@Home: search for pulsars on home computers development of data analysis algorithms: Hough transform
ALBERT-EINSTEIN-INSTITUT HANNOVER Gravitational Wave Detector GEO600
North end mirror
600 m
A Michelson Interferometer laser + with 600 m armlength beam splitter central building 600 m end mirror East Institute of Floriculture, Tree Nursery Science and Plant Breeding
ALBERT-EINSTEIN-INSTITUT HANNOVER Organization of GEO600
Max-Planck-Institut Institute for Gravitational für Gravitationsphysik, Research, Univ. Glasgow Potsdam und Hannover
Leibniz Universität Hannover
Cardiff University
Max-Planck-Institut für Quantenoptik, Garching
ALBERT-EINSTEIN-INSTITUT HANNOVER History of GEO600
Garching 30 m prototype 1975 MPI for Astrophysics (Garching) 3 m prototype
1983 MPI for Quantum Optics (Garching) 30 m prototype
1989 Cooperation with Glasgow group
Ruthe 25 km south 1995 September 5th : of Hannover breaking ground for GEO600
2002 first science run (S1) together with LIGO
K. Danzmann
ALBERT-EINSTEIN-INSTITUT HANNOVER Impressions from the GEO Site
workshop central building directional offices radio link
high-tech in an austere environment clean room control room
ALBERT-EINSTEIN-INSTITUT HANNOVER Worldwide Collaboration
3 km H1: 4 km 600 m H2: 2 km L1: 4 km 300 m
AdvLIGO AIGO 80 m LIGO Scientific Collaboration
ALBERT-EINSTEIN-INSTITUT HANNOVER GEO Specialty: Monolithic Suspensions
Reaction pendulum Fused silica plates → test mass pendulum with two tips to weld thefibresonto Thermal noise reduction using ultra low-loss, quasi-monolithic fused silica suspensions fixed by means of hydroxy-catalysis bonding
ALBERT-EINSTEIN-INSTITUT HANNOVER GEO Specialty: Dual Recycling
output = carrier + sidebands shotnoise broadband fS = fL ± fgw PRM
laser Recycling the carrier (laser) → power recycling SRM narrow-band signal dynamical tuning Recycling the sidebands (gw signal) → signal recycling
Resonant enhancement of the signal amplitude Time (x 50) + tuning of the detector sensitivity
ALBERT-EINSTEIN-INSTITUT HANNOVER GEO Specialty: Laser Development
AdvLIGO laser: Together with the GEO600 laser system: 180 W cw output Laserzentrum Hannover 2 W cw Nd:YAG laser ∆P/P = 3·10–9/√Hz plus 35 W cw 4-head
Nd:YVO4 amplifier ∆P/P = 2·10–8/√Hz Just delivered for use in EnhLIGO ! ∆f = 2·10–4/√Hz
high-power slave laser 4-head amplifier
ALBERT-EINSTEIN-INSTITUT HANNOVER GEO R&D – 3rd Generation GW Detectors
Diffractive optics: Use gratings Quantum noise: use squeezed instead of transmissive components light to beat the standard quantum limit
Littrow mounting Feed squeezed vacuum noise into the output port
Shot noise with beam signal recycling splitter & squeezed light
ALBERT-EINSTEIN-INSTITUT HANNOVER LISA & LISA Pathfinder
Laser development: P = 1W Power stabilisation: ∆P/P < 2·10-4/√Hz Frequency reference: ∆f < 30 Hz/√Hz
LISA Interferometric readout for LPF: Heterodyne interferometers Phase measurement system ∆φ = 2π·10–6 rad /√Hz
L = 5 mio km
L = 30 cm
ALBERT-EINSTEIN-INSTITUT HANNOVER Schools & Collaborations
International Max Planck Research School on Gravitational Wave Astronomy
Doctoral program for students with Master or Diploma. In addition to their research work IMPRS on GWA advanced lecture courses are offered by the school. imprs-gw.aei.mpg.de Apply !
Special Research Area „Gravitational Wave Astronomy“ SFB/TR7 Research positions at the universities of Hannover, Jena, Tübingen and at GWA the MPI Astrophysics (Garching), AEI
ALBERT-EINSTEIN-INSTITUT HANNOVER Congratulations !
Our best wishes for the IGC !
… & on good cooperation …
kennislink.nl
ALBERT-EINSTEIN-INSTITUT HANNOVER