Download to read offline
Gravitational wave detection.pptx
- 1. IIT ROORKEE GRAVITATIONAL WAVE DETECTION EXPLORINGTHE COSMIC RIPPLES
- 2.
- 4. • Gravitational wavesare produced whenever an object is accelerated with respect to another object. THE ORIGIN Yellow structures near the black holes illustrate the strong curvature of space-time in the region • This new era of astronomy allows us to look farther into the universe than possible by studying the electromagnetic waves from outer space. • Every mass has effect on every other mass in the universe. The information contained in the activities of masses can be spread out in the form of changing gravity.
- 5. MICHAELSON INTERFEROMETER How didit serve as a basis for LIGO? 01 The First signal ever detected 02 Conditions required for detection 03
- 6. 01 03 02 Conditions •Vacuum • Vibration Isolation • High-Power lasers LIGO Setup LIGO - Caltech • L-shaped laser interferometer with arms 4 km long First ever signal • Signal from two massive black holes that collided 13.6 billion years ago
- 7. PULSAR TIMING ARRAY •Minute distortions in space-time can be detected as deviations in the expected arrival times of the regular pulsar signals • Upon passage of a wave, the pulsars either move closer to us or farther away from us • Radio Telescopes measures fluctuations
- 8.
- 10. LISA LASER INTERFEROMETER SPACEANTENNA LISA operates in the low-frequency range, between 0.1 mHz and 1 Hz. LIGO's frequency range is 10 Hz to 1000 Hz Consist of three spacecraft arranged in a triangular formation positioned at 2.5 million km apart Emit a highly stable, precisely tuned laser beam towards each other. They have a source of laser beam inside, emitting another beam of coherent laser with restored intensity
- 11. QUANTUM SENSORS • Enhancedsensitivity translates to ability to detect weaker gravitational waves • Greater sensitivity in measuring length, time and frequency 01 CRYOGENIC ELECTRONICS • Work at extremely low temperatures, reducing thermal and electronic noise • They offer long-term stability and can process and digitize the signals with more precision 02 DATA ACQUISTION SYSTEM • The detectors generate vast amounts of data • High speed data acquisition system with large storage is essential for its operation 03 BETTER LASERS • High-power stable and frequency tunable lasers is crucial for interferometric detectors • High-power increases the intensity hence increasing ability to detect fainter signals 04
- 12.
- 13.
- 14.
- 15.