ligo in mississippi
DESCRIPTION
LIGO in Mississippi. Marco Cavaglià. LIGO Scientific Collaboration Dept. of Physics and Astronomy University of Mississippi. Background picture from http://cgwp.gravity.psu.edu. What is LIGO?. L IGO S cientific C ollaboration =. + …. LIGO =. L aser. I nterferometer. - PowerPoint PPT PresentationTRANSCRIPT
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
LIGO in MississippiLIGO in MississippiMarco Cavaglià
LIGO Scientific CollaborationDept. of Physics and Astronomy
University of Mississippi
Background picture from http://cgwp.gravity.psu.edu
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
What is LIGO?What is LIGO?
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
LIGO =LIGO =
Gravitational-waveObservatory
Interferometer
+ …LIGO Scientific Collaboration =
Laser
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
Livingston (LA)4 km interferometer
Hanford (WA)4 km + 2 km interferometers
Two LIGO Observatories
~2.5 hr
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
Livingston, Louisiana
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
InputBeam
(Laser)
RMBS
ITMX
ITMY
ETMY
ETMX
ReflectedPort
Anti-SymmetricPort
PickoffPort
Ly
Lx
StrainReadout(L
y-L
x)
6 W
250 W
14 kW
~0.2 W
Interferometer design
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
Vacuum equipmentVacuum equipment
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
Core optic suspensionsCore optic
suspensions
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
Core opticsCore optics
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
The control roomThe control room
Vitor Cardoso(postdoc @ Ole Miss)
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
What do we hope to see?What do we hope to see?
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
Gravitational waves
When masses move rapidly, the spacetime becomes stirred by their motion: ripples start traveling outward
with the speed of light
Einstein’s General Relativity
The spacetime geometry is continuously distorted by the presence of mass (=energy).
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
What is the effect of a gravitational wave?
We will experiment on a graduate student
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
How do we know that gravitational waves exist?
How do we know that gravitational waves exist?
John Rowe Animation/Australia Telescope National Facility, CSIRO
Indirect detection: slow down of a binary pulsar
R. Hulse J. Taylor
Nobel prize in physics, 1993
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
Sources of gravitational wavesSources of gravitational waves
♦ Coalescing binary neutron stars or black holes
♦ Spinning neutron stars
♦ Gravitational bursts (e.g. supernovae)
♦ Big bang gravitational echo
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
Sources of gravitational wavesSources of gravitational waves
♦ Coalescing binary neutron stars or black holes
Picture credit: NASA/CXC/AIfA; NRAO/VLA/NRL
♦ Spinning neutron stars
♦ Gravitational bursts (e.g. supernovae)
♦ Big bang gravitational echo
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
Sources of gravitational wavesSources of gravitational waves
♦ Coalescing binary neutron stars or black holes
♦ Spinning neutron stars
♦ Gravitational bursts (e.g. supernovae)
♦ Big bang gravitational echo
Picture credit: NASA/HST/STScI
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
Sources of gravitational wavesSources of gravitational waves
♦ Coalescing binary neutron stars or black holes
Picture credit: NASA/HST/STScI
♦ Spinning neutron stars
♦ Gravitational bursts (e.g. supernovae)
♦ Big bang gravitational echo
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
Sources of gravitational wavesSources of gravitational waves
♦ Coalescing binary neutron stars or black holes
Picture credit: NASA/WMAP
♦ Spinning neutron stars
♦ Gravitational bursts (e.g. supernovae)
♦ Big bang gravitational echo
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
Science Requirement. document (1995)
S2: Feb.- Apr. 200359 days BNS reach ~ 1Mpc
S3: Oct. ‘03 - Jan. ‘0470 days BNS reach ~ 3Mpc
S5: Nov 2005 – Current
S4: Feb. - Mar. 200530 days BNS reach ~ 15Mpc
LIGO sensitivityLIGO sensitivity
Distance Earth-Sun (93.2 million miles)…
…stretches by a fraction of an atom!
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
LIGO is so sensitive that it feels…LIGO is so sensitive that it feels…
♦ Cars and trucks
♦ Airplanes
♦ Sea waves
♦ Earthquakes…
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
LIGO outreachLIGO outreach
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
LIGO Science Education CenterLIGO Science Education Center
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
Photos by Ana Sousa
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
http://www.ligo-la.caltech.edu
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
The Einstein@home Project
http://www.einsteinathome.org
Sun Oct 8 2007 17:12 UTC
MAP Fall Meeting – Canton MS, Nov. 3rd, 2007LIGO-G070633-00-Z
Thank you!Thank you!