Wide Angle Scatter from TM
4/5/12
IFO waist size, m
IFO arm length, m
Minimum displacement detectivity
@ 100 Hz, m/rt Hz
seismic displacement @ 100 HZ, m/rt HZ
cryo shield displacement @ 100 HZ, m/rt HZ
Wide angle baffle motion attenuation @ 100 HZ, m/rt HZ
Wide Angle Baffle displacement @ 100 Hz, m/rtHz
Transfer function @ 100 Hz, ITM HR
BRDF of chamber wall, sr^-1
BRDF of oxidized polished steel, sr^-1
BRDF of stainless steel, sr^-1
BRDF of thermal baffle, sr^-1
BRDF of cryo shield sr^-1
laser wavelength, m
wave number, m^-1
solid angle of IFO mode, sr
hemispherical scattering loss fraction
TM wide angle(ref: T070089)
arm power, W
input laser power, W
radius of manifold aperture, m
radius of WAB aperture, m
number of WAB baffles
FOR THE FOLLOWING DATA, SEE:
/LCGT/Wide Ange Baffle_Manifold Baffle_Beam Tube Baffle/WIDE ANGLE BAFFLE SCATTERED POWER.xlsx
PATH LENGTH FROM SCATTER SOURCE
distance from ITM to scattering surface, m
ARM-CAVITY-BAF-PLATE-2, m
ARM-CAVITY-BAF-PLATE-3, m
ACB_WIDE-ANGLE-BAFFLE-SIDE L, m
ACB_WIDE-ANGLE-BAFFLE-SIDE R, m
WIDE-ANGLE-BAF-TOP-LEDGE, m
WIDE-ANGLE-BAF-BOTTOM-LEDGE, m
FRONT-SIDE-CRYO, m
thermal-baffle, m
TM INCIDENT ANGLE FROM SCATTER SOURCE
ARM-CAVITY-BAF-PLATE-2, rad
ARM-CAVITY-BAF-PLATE-3, rad
ACB_WIDE-ANGLE-BAFFLE-SIDE L, rad
ACB_WIDE-ANGLE-BAFFLE-SIDE R, rad
WIDE-ANGLE-BAF-TOP-LEDGE5, rad
WIDE-ANGLE-BAF-BOTTOM-LEDGE, rad
FRONT-SIDE-CRYO,
thermal-baffle
FRACTIONAL POWER ONTO SCATTER SOURCE
ARM-CAVITY-BAF-PLATE-2
ARM-CAVITY-BAF-PLATE-3
ACB_WIDE-ANGLE-BAFFLE-SIDE L
ACB_WIDE-ANGLE-BAFFLE-SIDE R
WIDE-ANGLE-BAF-TOP-LEDGE
WIDE-ANGLE-BAF-BOTTOM-LEDGE
FRONT-SIDE-CRYO
THERMAL-BAFFLES
Power fraction
POWER FROM TM INCIDENT ONTO SCATTERING
Power incident on baffle surface
ARM-CAVITY-BAF-PLATE-2, W
ARM-CAVITY-BAF-PLATE-3, rad
ACB_WIDE-ANGLE-BAFFLE-SIDE L, W
ACB_WIDE-ANGLE-BAFFLE-SIDE R, W
WIDE-ANGLE-BAF-TOP-LEDGE, W
WIDE-ANGLE-BAF-BOTTOM-LEDGE, W
Total wide angle baffle incident power, W
FRONT-SIDE-CRYO,
thermal-baffle. W
Wide Angle Scatter Ref:
1) LIGO T070089 Wide Angle Scatter from LIGO Arm Cavities, P. Fritschel , M. E. Zucker
2) LIGO T1100113 Michael Smith
Power scattered from surface back into IFO mode
ARM-CAVITY-BAF-PLATE-2, W
ARM-CAVITY-BAF-PLATE-3, W
ACB_WIDE-ANGLE-BAFFLE-SIDE L, W
ACB_WIDE-ANGLE-BAFFLE-SIDE R, W
WIDE-ANGLE-BAF-TOP-LEDGE5, W
WIDE-ANGLE-BAF-BOTTOM-LEDGE, W
TOTAL WIDE ANGLE BAFFLE SCATTER INTO IFO
FRONT-SIDE-CRYO,
thermal-baffle, W
DISPLACEMENT NOISE @ 100 Hz, m/rtHz
Wide Angle Baffle displacement noise
Front-side cryo shield displacement noise
Thermal baffle displacement noise
Minimum displacement detectivity
@ 100 Hz, m/rt Hz
SCATTER FROM FRONT OF ACB BY FAR END TM SCATTER
half-angle from centerline to Rmb, rad
half-angle from centerline to
BRDF, sr^-1; CSIRO, surface 2, S/N 2
power incident on WAB front, W
scatter efficiency, fraction of arm cavity power incident on manifold baffle
Power Scattered into IFO