Differences between revisions 14 and 25 (spanning 11 versions)

Actual Optical Parameters of the Main Interferometer

Contents

Actual Optical Parameters of the Main Interferometer
1. Optical Parameters
2. Mirror Specs
  1. Test Masses

Optical Parameters

Interferometer Diagram

MIF Diagram

g1=-0.7857, g2=-0.6043, 16.875MHz, 45MHz

This is the parameter set chosen by the MIF group.

Lengths & Frequencies

f1	16.880962MHz (3*f2/8)	f2	45.015898MHz	f3	56.269873MHz (10*f2/8)
Larm	3000.0m	Lmc	26.639m
Lprc	66.591m	Lsrc	66.591m	Las	3.3299m
Lp1	14.7606	Lp2	11.0669m	Lp3	15.7638m
Lmi	25m	Lmx	26.6649m	Lmy	23.3351m
Ls1	14.7606m	Ls2	11.0669m	Ls3	15.7638m
Folding angle	0.6860[deg]

Folding angle is an incident angle of the beam to the folding mirrors. The angle between incoming and reflected beams is twice the folding angle.

Radius of Curvatures (Positive for concave)

ITM	1680.0m	ETM	1870.0m
PRM	303.96m	PR2	-2.7628m	PR3	24.574m
SRM	303.96m	SR2	-2.7764m	SR3	24.584m

Beam Spot Size (1/e^2 radius)

ITM	35.064mm	ETM	39.983mm
PRM	4.030mm	PR2	4.030mm	PR3	36.479mm
SRM	4.031mm	SR2	4.031mm	SR3	36.327mm

Lens effect (effective focal length seen from the AR side)

ITM (Sapphire)	>666km
PRM (Silica)	>10000km

g1=g2=0.586, 11.25MHz, 45MHz

This is an alternative parameter set. Do not use these parameters.

Lengths & Frequencies

f1	11.255822MHz	f2	45.023289MHz	f3	39.395378MHz
Larm	3000.0m	Lmc	26.634m
Lprc	73.24838m	Lsrc	73.24838m	Las	3.3293m
Lp1	16.9798m	Lp2	14.2858m	Lp3	16.9828m
Lmi	25m	Lmx	26.66465m	Lmy	23.33535m
Ls1	16.9798m	Ls2	14.2858m	Ls3	16.9828m

Radius of Curvatures (Positive for concave)

ITM	7246.3768m	ETM	7246.3768m
PRM	361.552m	PR2	-3.985m	PR3	32.4m
SRM	361.552m	SR2	-3.985m	SR3	32.4m

Beam Spot Size (1/e^2 radius)

PRM	4.355mm	PR2	4.355mm	PR3	35.77mm
SRM	4.355mm	SR2	4.355mm	SR3	35.77mm

Lens effect (effective focal length seen from the AR side)

ITM (Sapphire)	-9610m
PRM (Silica)	-765.6m

Mirror Specs

Test Masses

ITM

HR Radius of Curvature	1.68(+/-0.008)km	0.5% error
AR Radius of Curvature	Flat (>100km)	As flat as possible
AR Wedge Angle	0.2+/-0.002deg
Transmission@1064nm	0.004 +0.001/-0.0
Transmission asymmetry@1064nm	2*\|(T1-T2)/(T1+T2)\| < 0.01	T1 and T2 are the transmission of two ITMs
HR Loss@1064nm	<45ppm
Transmission@532nm	0.2(+/-0.1)	Transmission of ITM must be larger than ETM@532nm
Transmission asymmetry@532nm	No requirement
HR Loss@532nm	<1%
AR Reflectivity@1064nm	200(+100/-0)ppm
AR Reflectivity@532nm	<5%	As small as possible

ETM

HR Radius of Curvature	1.87(+/-0.009)km	0.5% error
AR Radius of Curvature	Flat (>100km)	As flat as possible
AR Wedge Angle	0.2+/-0.1deg
Transmission@1064nm	5ppm < T < 10ppm
Transmission asymmetry@1064nm	2*\|(T1-T2)/(T1+T2)\| < 0.01	Best Effort
HR Loss@1064nm	<45ppm
Transmission@532nm	0.2(+/-0.01)	Transmission of ETM must be smaller than ITM@532nm
Transmission asymmetry@532nm	No requirement
HR Loss@532nm	<1%
AR Reflectivity@1064nm	200(+100/-0)ppm
AR Reflectivity@532nm	<5%	As small as possible

-  ⇤ ← Revision 14 as of 2011-02-16 23:22:19 → 
  Size: 2177
  Editor: YoichiAso
  Comment:
+   ← Revision 25 as of 2011-10-14 18:34:19 → ⇥
  Size: 3851
  Editor: YoichiAso
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 2:
-Line 7:
+Line 6:
-{{attachment:MIF-diagram.png|MIF Diagram|width=800}}
+{{attachment:MIF-diagram.png|MIF Diagram|width="800"}}
-Line 10:
+Line 9:
-=== g1=0.994, g2=0.571, 16.875MHz, 45MHz ===
+=== g1=-0.7857, g2=-0.6043, 16.875MHz, 45MHz ===
-Line 15:
+Line 13:
-||f1||16.881370MHz (3*f2/8)||f2||45.016989MHz||f3||56.271236MHz (10*f2/8)||
||Larm||3000.0m||Lmc||26.638m||||||
||Lprc||66.5863m||Lsrc||66.5924m||Las||3.3298m||
||Lp1||14.75854||Lp2||12.0657m||Lp3||14.7621m||
||Lmi||25m||Lmx||26.6649m||Lmy||23.3351m||
||Ls1||14.75854m||Ls2||12.0657m||Ls3||14.7621m||
||Folding angle||0.6293[deg]||||||||||
+||f1 ||16.880962MHz (3*f2/8) ||f2 ||45.015898MHz ||f3 ||56.269873MHz (10*f2/8) ||
||Larm ||3000.0m ||Lmc ||26.639m ||||<style="text-align:center"> ||
||Lprc ||66.591m ||Lsrc ||66.591m ||Las ||3.3299m ||
||Lp1 ||14.7606 ||Lp2 ||11.0669m ||Lp3 ||15.7638m ||
||Lmi ||25m ||Lmx ||26.6649m ||Lmy ||23.3351m ||
||Ls1 ||14.7606m ||Ls2 ||11.0669m ||Ls3 ||15.7638m ||
||Folding angle ||0.6860[deg] ||||||||<style="text-align:center"> ||
-Line 23:
+Line 21:
-Folding angle is an incident angle of the beam
to the folding mirrors. The angle between incoming and reflected beams is twice the folding angle.
+Folding angle is an incident angle of the beam to the folding mirrors. The angle between incoming and reflected beams is twice the folding angle.
-Line 27:
+Line 25:
+||ITM ||1680.0m ||ETM ||1870.0m ||||<style="text-align:center"> ||
||PRM ||303.96m ||PR2 ||-2.7628m ||PR3 ||24.574m ||
||SRM ||303.96m ||SR2 ||-2.7764m ||SR3 ||24.584m ||
-Line 28:
+Line 29:
-||ITM||>500km||ETM||7000.0m||||||
||PRM||314.2661m||PR2||-3.2563m||PR3||27.36m||
||SRM||314.2661m||SR2||-3.2563m||SR3||27.36m||
-Line 33:
+Line 31:
-||PRM||4.05mm||PR2||4.05mm||PR3||34.242mm||
||SRM||4.05mm||SR2||4.05mm||SR3||34.242mm||
+||ITM ||35.064mm ||ETM ||39.983mm ||||<style="text-align:center"> ||
||PRM ||4.030mm ||PR2 ||4.030mm ||PR3 ||36.479mm ||
||SRM ||4.031mm ||SR2 ||4.031mm ||SR3 ||36.327mm ||
 Line 37:
+||ITM (Sapphire) ||>666km ||
||PRM (Silica) ||>10000km ||
-Line 38:
+Line 40:
-||ITM (Sapphire)||>666km||
||PRM (Silica)||>10000km||
 Line 43:
-This is an alternative parameter set.
Do not use these parameters.
+This is an alternative parameter set. Do not use these parameters.
-Line 47:
+Line 46:
-||f1||11.255822MHz||f2||45.023289MHz||f3||39.395378MHz||
||Larm||3000.0m||Lmc||26.634m||||||
||Lprc||73.24838m||Lsrc||73.24838m||Las||3.3293m||
||Lp1||16.9798m||Lp2||14.2858m||Lp3||16.9828m||
||Lmi||25m||Lmx||26.66465m||Lmy||23.33535m||
||Ls1||16.9798m||Ls2||14.2858m||Ls3||16.9828m||
+||f1 ||11.255822MHz ||f2 ||45.023289MHz ||f3 ||39.395378MHz ||
||Larm ||3000.0m ||Lmc ||26.634m ||||<style="text-align:center"> ||
||Lprc ||73.24838m ||Lsrc ||73.24838m ||Las ||3.3293m ||
||Lp1 ||16.9798m ||Lp2 ||14.2858m ||Lp3 ||16.9828m ||
||Lmi ||25m ||Lmx ||26.66465m ||Lmy ||23.33535m ||
||Ls1 ||16.9798m ||Ls2 ||14.2858m ||Ls3 ||16.9828m ||
-Line 55:
+Line 57:
+||ITM ||7246.3768m ||ETM ||7246.3768m ||||<style="text-align:center"> ||
||PRM ||361.552m ||PR2 ||-3.985m ||PR3 ||32.4m ||
||SRM ||361.552m ||SR2 ||-3.985m ||SR3 ||32.4m ||
-Line 56:
+Line 61:
-||ITM||7246.3768m||ETM||7246.3768m||||||
||PRM||361.552m||PR2||-3.985m||PR3||32.4m||
||SRM||361.552m||SR2||-3.985m||SR3||32.4m||
-Line 61:
+Line 65:
-||PRM||4.355mm||PR2||4.355mm||PR3||35.77mm||
||SRM||4.355mm||SR2||4.355mm||SR3||35.77mm||
+||PRM ||4.355mm ||PR2 ||4.355mm ||PR3 ||35.77mm ||
||SRM ||4.355mm ||SR2 ||4.355mm ||SR3 ||35.77mm ||
-Line 65:
+Line 72:
+||ITM (Sapphire) ||-9610m ||
||PRM (Silica) ||-765.6m ||
-Line 66:
+Line 75:
-||ITM (Sapphire)||-9610m||
||PRM (Silica)||-765.6m||
-Line 71:
+Line 80:
+=== Test Masses ===
'''ITM'''
||HR Radius of Curvature ||1.68(+/-0.008)km ||0.5% error ||
||AR Radius of Curvature ||Flat (>100km) ||As flat as possible ||
||AR Wedge Angle ||0.2+/-0.002deg || ||
||Transmission@1064nm ||0.004 +0.001/-0.0 || ||
||Transmission asymmetry@1064nm ||2*|(T1-T2)/(T1+T2)| < 0.01 ||T1 and T2 are the transmission of two ITMs ||
||HR Loss@1064nm ||<45ppm || ||
||Transmission@532nm ||0.2(+/-0.1) ||Transmission of ITM must be larger than ETM@532nm ||
||Transmission asymmetry@532nm ||No requirement || ||
||HR Loss@532nm ||<1% || ||
||AR Reflectivity@1064nm ||200(+100/-0)ppm || ||
||AR Reflectivity@532nm ||<5% ||As small as possible ||




'''ETM'''
||HR Radius of Curvature ||1.87(+/-0.009)km ||0.5% error ||
||AR Radius of Curvature ||Flat (>100km) ||As flat as possible ||
||AR Wedge Angle ||0.2+/-0.1deg || ||
||Transmission@1064nm ||5ppm < T < 10ppm || ||
||Transmission asymmetry@1064nm ||2*|(T1-T2)/(T1+T2)| < 0.01 ||Best Effort ||
||HR Loss@1064nm ||<45ppm || ||
||Transmission@532nm ||0.2(+/-0.01) ||Transmission of ETM must be smaller than ITM@532nm ||
||Transmission asymmetry@532nm ||No requirement || ||
||HR Loss@532nm ||<1% || ||
||AR Reflectivity@1064nm ||200(+100/-0)ppm || ||
||AR Reflectivity@532nm ||<5% ||As small as possible ||