Sumários
Input optics functions and implementations
13 Maio 2024, 14:00 • José Manuel Rebordão
Input
optics. Mode cleaners. Model matching between beams and cavities.
Review
of gravitational wave detectors architecture and functions.
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CLASS
Pound-Denver-Hall control technique
10 Maio 2024, 09:00 • José Manuel Rebordão
Pound-Denver-Hall
control technique for
frequency stabilization
System
relevance of the Phase Modulators on the overall architecture of GW detectors
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CLASS
Signal Recycling Cavity. Tunability. Radiation pressure. Model cleaning
6 Maio 2024, 14:00 • José Manuel Rebordão
Signal Recycling Cavity: descriptions, analysis, poles. Temporal operating
mode of LIGO. Tunability, control of the pole position through the length of
the SRC; gain.
Radiation pressure
– overview of physics and effects. Brief analysis of different suspension systems
in aLIGO and ET.
Non-Planar
Ring Oscillators (NPRO) - overview
Mode cleaning
how it works; Gouy phase
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Frequency behaviour. The Power Recycling Cavity
3 Maio 2024, 09:00 • José Manuel Rebordão
Temporal
response of LIGO, modelling the GW disturbance on the end mirrors. Poles.
Bandwidth and tunability.
Brief
overview of the LIGO laser system.
The
Power Recycling Cavity (PRC): functions, implementation using a composite FP
cavity with 3 mirrors.
Concatenation
of 2 FP cavities; reflectance and transmittance. Resonance and anti-resonant
conditions.
PRC
gain and operational conditions
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Signal Recycling cavity (SRC)Fabry-Perot cavities
29 Abril 2024, 14:00 • José Manuel Rebordão
Analysis
of general 2 mirror FP cavities, reflection and transmittance, power cavity
gain.
Increased sensitivity due to the huge phase amplification of the reflected wave at resonances.
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CLASS