Heidelberg 2022 – wissenschaftliches Programm
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GR: Fachverband Gravitation und Relativitätstheorie
GR 14: Gravitational Wave Detectors
GR 14.5: Vortrag
Donnerstag, 24. März 2022, 17:35–17:55, GR-H2
A cryogenic displacement sensor and actuator for the E-TEST project — •Kuhlbusch Tim1, Thomas Hebbeker2, Robert Joppe2, Vivek Pimpalshende1, Oliver Pooth1, Achim Stahl1, and Franz-Peter Zantis2 — 1III. Physikalisches Institut B, RWTH Aachen — 2III. Physikalisches Institut A, RWTH Aachen
The Einstein Telescope will be the first third generation gravitational wave detector. In achieving a sensitivity increase of more than one order of magnitude at low frequencies compared to current detectors, mitigating thermal noises is essential. Cooling the mirrors to cryogenic temperatures is thus required. This also creates the need for parts of the vibration isolations systems of the mirrors to be working at low temperatures.
This talk will present the developement of an actuator with an integrated absolute displacement sensor operating below 20 K as part of the E-TEST project. The sensitivity of the sensor, the forces of the actuator and the thermal design will be discussed.