Damping of the test mass oscillations caused by multistrip electrostatic actuator

Citation
Vp. Mitrofanov et al., Damping of the test mass oscillations caused by multistrip electrostatic actuator, PHYS LETT A, 278(1-2), 2000, pp. 25-29
Citations number
14
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS A
ISSN journal
0375-9601 → ACNP
Volume
278
Issue
1-2
Year of publication
2000
Pages
25 - 29
Database
ISI
SICI code
0375-9601(200012)278:1-2<25:DOTTMO>2.0.ZU;2-6
Abstract
Multistrip electrostatic actuators are supposed to be used to provide fine control of the test mass position in laser interferometric gravitational wa ve detectors. This Letter describes the results of investigations into the damping Q(e)(-1) of the torsion mode of bifilar all-fused silica pendulum c aused by the electrostatic actuator. Our results show that the important so urce of losses is associated with properties of the pendulum mass surface t hat moves in the electric field of the actuator. The flame treatment of thi s surface allowed us to reduce the damping Q(e)(-1) to the level of less th an 3 x 10(-9) provided that forces up to 10(-4) N were exerted by the actua tor on the suspended mass. (C) 2000 Elsevier Science B.V. All rights reserv ed.