Projects per year
Abstract
Designs for future gravitational wave detection facilities feature silicon test masses at cryogenic temperatures to reduce thermal noise and thermally induced aberrations. Designers call for operation at 123 K or close to 18 K to exploit the vanishing thermal expansion of crystalline silicon. The amount of absorbed heat that can be radiatively removed from the test masses is limited at these temperatures, forcing complex cooling scenarios to be considered, including conduction through suspension wires. This is particularly relevant for the kilohertz class of detectors that aim for extremely high circulating power, i.e., roughly a factor 20 more than the world record at the time of writing, to reduce quantum noise. We explore the impact of raising the test mass temperature and show that a dedicated kilohertz-band cryogenic instrument can do so without significant sensitivity penalty, thereby boosting the radiative cooling rate and allowing higher power operation with simpler suspensions. We also explore the implications of operating cryogenic broadband detectors at elevated temperatures. The work presented here was instrumental in the development of the Neutron Star Extreme Matter Observatory kilohertz-band gravitational wave detector design concept.
Original language | English |
---|---|
Article number | 122003 |
Number of pages | 13 |
Journal | Physical Review D |
Volume | 102 |
Issue number | 12 |
DOIs | |
Publication status | Published - 18 Dec 2020 |
Fingerprint
Dive into the research topics of 'Practical test mass and suspension configuration for a cryogenic kilohertz gravitational wave detector'. Together they form a unique fingerprint.Projects
- 1 Finished
-
ARC Centre of Excellence for Gravitational Wave Discovery
Bailes, M. (Investigator 01), McClelland, D. E. (Investigator 02), Levin, Y. (Investigator 03), Blair, D. (Investigator 04), Scott, S. (Investigator 05), Ottaway, D. (Investigator 06), Melatos, A. (Investigator 07), Veitch, P. (Investigator 08), Wen, L. (Investigator 09), Zhao, C. (Investigator 10), Ju, L. (Investigator 11) & Coward, D. (Investigator 12)
ARC Australian Research Council
1/01/17 → 31/12/23
Project: Research