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Baffle arrangement for LCGT

Previous consideration Baffles are placed at calculated reflection points. But! Reflection points are separated in the asymmetrical configuration for LCGT. Baffle arrangement for LCGT. R. Takahashi, June 30, 2006. Effective baffle number. Arm length L Radius of pipe R

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Baffle arrangement for LCGT

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  1. Previous consideration Baffles are placed at calculated reflection points. But! Reflection points are separated in the asymmetrical configuration for LCGT. Baffle arrangement for LCGT R. Takahashi, June 30, 2006

  2. Effective baffle number Arm length L Radius of pipe R Height of baffle h Pitch of baffle d

  3. Arm length 3000m Pipe diameter 1000mm Mirror diameter 250mm Radius of curvature 4500m Height of baffle 50mm Pitch of baffle 11m Distance of mirror 600mm Offset of mirror 340mm Seismic motion @30Hz 10-11m/Hz1/2 Effective baffle number 27 Parameters • Revised points • 2 arms ➞ x1.4 • w0 23mm ➞ 33mm • Sensitivity @30Hz 1x10-23➞ 2x10-23 [/Hz1/2] (6x10-20[m/Hz1/2])

  4. Estimated noise cf. Sensitivity of LCGT 6x10-20 m/Hz1/2 (COST: \70M ➞ \238M)

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