Abstract
In many sensitive measurement systems such as gravitational wave detectors, multistage low-loss vacuum-compatible suspension chains are required to effectively isolate the test mass from seismic disturbances. These chains usually have high quality factor normal modes which require damping. A technique termed "self-damping" in which the motion of orthogonal modes of the same stage mass is deliberately viscously cross-coupled to each other - thereby damping both modes - was engineered into the suspension chains used in an 80 m suspended high-power optical cavity. In this report, we investigate in detail the performance of a single stage of these chains. We model the system using numerical simulation and compare this with experimental measurements with different damping parameters in order to optimize the self-damping obtained using this technique.
| Original language | English |
|---|---|
| Article number | 065103 |
| Journal | Review of Scientific Instruments |
| Volume | 90 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 1 Jun 2019 |
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Characterization of a self-damped pendulum for vibration isolation. / Vallat, Aodren; Naveh, Yoav; Winterflood, John; Ju, Li; Blair, David G.
In: Review of Scientific Instruments, Vol. 90, No. 6, 065103, 01.06.2019.Research output: Contribution to journal › Article
TY - JOUR
T1 - Characterization of a self-damped pendulum for vibration isolation
AU - Vallat, Aodren
AU - Naveh, Yoav
AU - Winterflood, John
AU - Ju, Li
AU - Blair, David G.
PY - 2019/6/1
Y1 - 2019/6/1
N2 - In many sensitive measurement systems such as gravitational wave detectors, multistage low-loss vacuum-compatible suspension chains are required to effectively isolate the test mass from seismic disturbances. These chains usually have high quality factor normal modes which require damping. A technique termed "self-damping" in which the motion of orthogonal modes of the same stage mass is deliberately viscously cross-coupled to each other - thereby damping both modes - was engineered into the suspension chains used in an 80 m suspended high-power optical cavity. In this report, we investigate in detail the performance of a single stage of these chains. We model the system using numerical simulation and compare this with experimental measurements with different damping parameters in order to optimize the self-damping obtained using this technique.
AB - In many sensitive measurement systems such as gravitational wave detectors, multistage low-loss vacuum-compatible suspension chains are required to effectively isolate the test mass from seismic disturbances. These chains usually have high quality factor normal modes which require damping. A technique termed "self-damping" in which the motion of orthogonal modes of the same stage mass is deliberately viscously cross-coupled to each other - thereby damping both modes - was engineered into the suspension chains used in an 80 m suspended high-power optical cavity. In this report, we investigate in detail the performance of a single stage of these chains. We model the system using numerical simulation and compare this with experimental measurements with different damping parameters in order to optimize the self-damping obtained using this technique.
UR - http://www.scopus.com/inward/record.url?scp=85066921163&partnerID=8YFLogxK
U2 - 10.1063/1.5086764
DO - 10.1063/1.5086764
M3 - Article
VL - 90
JO - Review of Scientific Instruments
JF - Review of Scientific Instruments
SN - 0034-6748
IS - 6
M1 - 065103
ER -