Improving sensitivity and duty-cycle of a double torsion pendulum

Journal
Date Issued
2019
Author(s)
Bassan, M.
•
De Laurentis, M.
•
De Rosa, R.
•
Di Fiore, L.
•
•
Garufi, F.
•
•
Minenkov, Y.
•
Pucacco, G.
•
Spagnuolo, V.
•
Stanga, R.
•
DOI
Abstract
In this paper the enhancement of the sensitivity and of the duty-cycle of a double stage suspended torsion pendulum are described. The increase in sensitivity, both for force and torque measurements, was obtained rearranging the pendulum mechanics, reducing the value of the suspended masses and moments of inertia and by adopting additional read-outs based on optical levers. The improvement of the duty-cycle was obtained by controlling the suspension point of the pendulum to reduce the effect of seismic noise on the translation resonances of the system. The reduction of these motions allowed continuous operation for three weeks, in high sensitivity regime of the read-out electronics, resulting in a force sensitivity of and a torque sensitivity of around 10 mHz.
Volume
36
Issue
12
Start page
125004
Uri
Url
Issn Identifier
0264-9381
Ads BibCode
2019CQGra..36l5004B
Rights
restricted
File(s)
Loading...
Thumbnail Image
Name

Bassan_2019_Class._Quantum_Grav._36_125004.pdf

Description
[Administrators only]
Size

1.86 MB

Format

Adobe PDF

Checksum (MD5)

b0f9cb84ea5bbc6c5460a41a728d826e