From edcd67851bca03c9d4bebbd5dab6d660beb6a5de Mon Sep 17 00:00:00 2001
From: Evan Hall <evan.hall@ligo.org>
Date: Fri, 18 Oct 2019 15:48:38 -0400
Subject: [PATCH] Update parameters for CE2
Fix suspension: silicon blade spring
2 um wavelength
Seismic and Newtonian parameters
---
gwinc/ifo/CE2/ifo.yaml | 66 +++++++++++++++++++++++-------------------
1 file changed, 36 insertions(+), 30 deletions(-)
diff --git a/gwinc/ifo/CE2/ifo.yaml b/gwinc/ifo/CE2/ifo.yaml
index 2ee3cba7..3c65f15b 100644
--- a/gwinc/ifo/CE2/ifo.yaml
+++ b/gwinc/ifo/CE2/ifo.yaml
@@ -34,6 +34,7 @@ Infrastructure:
pressure: 4.0e-7 # Pa
mass: 3.35e-27 # kg, Mass of H_2 (ref. 10)
polarizability: 0.81e-30 # m^3 (H_2, DOI: 10.1116/1.1479360)
+ BuildingRadius: 10 # m
TCS:
## Parameter describing thermal lensing
@@ -66,21 +67,25 @@ TCS:
SRCloss: 0.00
Seismic:
- ## Seismic and Gravity Gradient Parameters
- Site: 'LHO' # LHO or LLO (only used for Newtonian noise)
- KneeFrequency: 10 # Hz; freq where 'flat' noise rolls off
- LowFrequencyLevel: 1e-9 # m/rtHz; seismic noise level below f_knee
- Gamma: 0.8 # abruptness of change at f_knee
- Rho: 1.8e3 # kg/m^3; density of the ground nearby
- Beta: 0.6 # quiet times beta = 0.35-0.60; noisy times beta = 0.15-1.4
- Omicron: 10 # Feedforward cancellation factor
- TestMassHeight: 1.5 # m
- RayleighWaveSpeed: 250 # m/s
- #darmSeiSusFile: 'CryogenicLIGO/Sensitivity/GWINC/seismic.mat'
+ Site: 'LHO' # LHO or LLO (only used for Newtonian noise)
+ KneeFrequency: 5 # Hz; freq where 'flat' noise rolls off
+ LowFrequencyLevel: 1e-9 # m/rtHz; seismic noise level below f_knee
+ KneeFrequencyHorizontal: 4 # Hz; freq where 'flat' noise rolls off
+ LowFrequencyLevelHorizontal: 1e-9 # m/rtHz; seismic noise level below f_knee
+ Gamma: 0.8 # abruptness of change at f_knee
+ Rho: 1.8e3 # kg/m^3; density of the ground nearby
+ Beta: 0.8 # quiet times beta: 0.35-0.60
+ # noisy times beta: 0.15-1.4
+ Omicron: 10 # Feedforward cancellation factor
+ TestMassHeight: 1.5 # m
+ pWaveSpeed: 600 # m/s
+ sWaveSpeed: 300 # m/s
+ RayleighWaveSpeed: 250 # m/s
+ pWaveLevel: 15 # Multiple of the Peterson NLNM amplitude
+ sWaveLevel: 15 # Multiple of the Peterson NLNM amplitude
+ PlatformMotion: '6D'
Atmospheric:
- InfrasoundLevel1Hz: 0.01 # Pa/rtHz
- InfrasoundExponent: -1
AirPressure: 101325 # Pa
AirDensity: 1.225 # kg/m**3
AdiabaticIndex: 1.4
@@ -93,8 +98,8 @@ Suspension:
FiberType: 'Ribbon'
# For Ribbon suspension
Ribbon:
- Thickness: 325e-6 # m
- Width: 3250e-6 # m
+ Thickness: 115e-6 # m
+ Width: 1150e-6 # m
Fiber:
Radius: 205e-6 # m
BreakStress: 750e6 # Pa; ref. K. Strain
@@ -110,6 +115,7 @@ Suspension:
K: 8000
WireRadius: .nan
Blade: 0.0042 # blade thickness
+ BladeMaterial: 'Silicon'
NWires: 4
- Mass: 316.8 # kg; susmat['PUMmass'][0,0]
Length: 0.682 # m
@@ -209,18 +215,18 @@ Materials:
# Silicon @ 120K (http://www.ioffe.ru/SVA/NSM/Semicond/Si/index.html)
Substrate:
# phi_sub = c2 * f^(MechLossExp)
- c2: 3e-13 # Coeff of freq dep. term for bulk loss (Lam & Douglass, 1981)
+ c2: 3e-13 # Coeff of freq dep. term for bulk loss (Lam & Douglass, 1981)
MechanicalLossExponent: 1 # Exponent for freq dependence of silicon loss
- Alphas: 5.2e-12 # Surface loss limit ???
- MirrorY: 155.8e9 # N/m^2; Youngs modulus (ioffe) -- what about anisotropy??
- MirrorSigma: 0.27 # kg/m^3; Poisson ratio (ioffe) -- what about anisotropy??
- MassDensity: 2329 # kg/m^3; (ioffe)
- MassAlpha: 1e-9 # 1/K; CTE = 0 @ 120 K
- MassCM: 300 # J/kg/K; specific heat (ioffe @ 120K)
- MassKappa: 700 # W/(m*K); thermal conductivity (ioffe @ 120)
- RefractiveIndex: 3.5 # 3.38 * (1 + 4e-5 * T) (ioffe)
- dndT: 1e-4 # ~123K & 1900 nm : http://arxiv.org/abs/physics/0606168
- Temp: 123 # mirror temperature [K]
+ Alphas: 5.2e-12 # Surface loss limit ???
+ MirrorY: 155.8e9 # N/m^2; Youngs modulus (ioffe) -- what about anisotropy??
+ MirrorSigma: 0.27 # kg/m^3; Poisson ratio (ioffe) -- what about anisotropy??
+ MassDensity: 2329 # kg/m^3; (ioffe)
+ MassAlpha: 1e-9 # 1/K; CTE = 0 @ 120 K
+ MassCM: 300 # J/kg/K; specific heat (ioffe @ 120K)
+ MassKappa: 700 # W/(m*K); thermal conductivity (ioffe @ 120)
+ RefractiveIndex: 3.5 # 3.38 * (1 + 4e-5 * T) (ioffe)
+ dndT: 1e-4 # ~123K & 1900 nm : http://arxiv.org/abs/physics/0606168
+ Temp: 123 # mirror temperature [K]
## parameters for semiconductor optics
isSemiConductor: True # we are doing semiconductor optics
CarrierDensity: 1e19 # 1/m^3; carrier density for phosphorous-doped silicon
@@ -235,8 +241,8 @@ Materials:
MassThickness: 0.286
Laser:
- Wavelength: 1550e-9 # m
- Power: 220 # W zz['x'][0][0]
+ Wavelength: 2000e-9 # m
+ Power: 250 # W zz['x'][0][0]
Optics:
Type: 'SignalRecycled'
@@ -308,8 +314,8 @@ Optics:
BSLoss: 0.1e-3 # power loss near beamsplitter
coupling: 1.0 # mismatch btwn arms & SRC modes; used to calculate an effective r_srm
Curvature:
- ITM: 34783 # RoC of ITM
- ETM: 34783 # RoC of ETM
+ ITM: 34000 # RoC of ITM
+ ETM: 36000 # RoC of ETM
SubstrateAbsorption: 0.5e-4 # 1/m; 0.3 ppm/cm for Hereaus
pcrit: 10 # W; tolerable heating power (factor 1 ATC)
Quadrature:
--
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