vibration isolation r. takahashi (icrr), k. yamamoto (icrr), t. uchiyama (icrr), t. sekiguchi...
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Vibration IsolationVibration Isolation
R. Takahashi (ICRR)R. Takahashi (ICRR), K. Yamamoto , K. Yamamoto (ICRR), (ICRR),
T. Uchiyama (ICRR), T. Sekiguchi (ICRR), T. Uchiyama (ICRR), T. Sekiguchi (ICRR), H. Ishizaki (NAOJ), A. Takamori (ERI), H. Ishizaki (NAOJ), A. Takamori (ERI),
R. DeSalvo (Univ. of Sannio), E. Majorana R. DeSalvo (Univ. of Sannio), E. Majorana (INFN), (INFN),
J. van den Brand (NIKHEF), E. Hennes J. van den Brand (NIKHEF), E. Hennes (NIKHEF), (NIKHEF),
A. Bertolini (AEI/NIKHEF)A. Bertolini (AEI/NIKHEF)
LCGT Collaboration Meeting(8 November, 2011)
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Rigid body ModelRigid body Model(angular motion of (angular motion of
mirror)mirror)
Room temp.
Cryogenic
vibration
Heat links
Monte Carlo simulation within the following asymmetries.Monte Carlo simulation within the following asymmetries. Wire lengthWire length :: ±0.5 mm±0.5 mm Suspension pointSuspension point :: ±0.5 mm ±0.5 mm for x, y, zfor x, y, z Effective stiffness of the inverted pendulumsEffective stiffness of the inverted pendulums :: ±50 %±50 % Anchor point of the heat linkAnchor point of the heat link :: ±5 cm±5 cm
T. Sekiguchi
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Angular Fluctuation of Mirror Angular Fluctuation of Mirror (Type-A)(Type-A)
Pitch
Yaw
Anchor point of heat links, asymmetry in IPs
Asymmetry in wire lengths/suspension points
T. Sekiguchi
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Impact to the Sensitivity (Type-Impact to the Sensitivity (Type-A)A)
The effect due to the angular motion is relatively small except some resonance peaks.
Pitch resonance peak
1 mm
T. Sekiguchi
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Evaluation of Pre-isolator prototype
Measured resonant frequency of Top filter
Pre-isolator and Support structure at ICRR
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Measurement of Top filter
Q-measurement using ring-down Amplitude dependence
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IP basement (hydraulic piston sled)
Delivered to ICRR on 10 November
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Design of Type-B Payload
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JGW-T1100637
Type-B suspension assembly
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Schedule 2011 2012 2013 2014 2015 2016
Standard GASF Prototype test in NIKEF & ICRR
Procure Assembling Pre-isolator Prototype test in ICRR Procure Assembling Type-B payload
Prototype test in NAOJ
Procure Assembling Installation Type-A SAS Prototype test in the site Installation Type-B SAS Prototype test in TAMA Installation Stack Procure Installation
First operation
Production schedule•19 Standard GAS filters: 2011FY•11 Pre-isolators: 2012FY•11 Type-B payloads: 2012FY•15 Optical benches: 2011-2012FY
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Standard GAS filter19 Box: 0.8 x 0.8 x 0.5
Pre-isolator11 Box: 1.7 x 1.7 x 1.3
Breadboard11 Box: 1.2 x 1.2 x 0.34 Box: 2 x 2 x 0.5
Clean Booth2 x 5 x 2.2
Storage & Assembling in Akeno Storage & Assembling in Akeno ObservatoryObservatory