LIGO Document T1300591-v2

ITM Elliptical Baffle--Black Glass Hybrid Design Scattering Analysis

Document #:
Document type:
T - Technical notes
Other Versions:
A hybrid design for the ITM Elliptical Baffle is proposed, in which a plate of black glass is attached to the existing center skin to cover the stainless steel (SS) surface; the only modification to the SS skin is to add several clearance holds for attachment bolts.
Greater than a factor 26 times reduction in scattered light displacement noise could be achieved with the Hybrid baffle.
A new blade spring may be needed to suspend the heavier baffle.
aos slc acb
Notes and Changes:
V2 Increased BRDF black glass @ 57 deg to 4E-5 sr^-1
Updated scattering solid angle
Increased rough cut hole edge area
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