Differences between revisions 11 and 27 (spanning 16 versions)

Actual Optical Parameters of the Main Interferometer

Contents

Actual Optical Parameters of the Main Interferometer
1. Optical Parameters
  1. Interferometer Diagram
  2. g1=-0.7857, g2=-0.6043, 16.875MHz, 45MHz
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

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 11 as of 2011-02-16 23:04:12 → 
  Size: 2163
  Editor: YoichiAso
  Comment:
+   ← Revision 27 as of 2011-10-14 18:36:09 → ⇥
  Size: 2850
  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 9:
+Line 8:
-=== g1=0.994, g2=0.571, 16.875MHz, 45MHz ===
+----
=== g1=-0.7857, g2=-0.6043, 16.875MHz, 45MHz ===
-Line 14:
+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||0.6957[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 22:
+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 26:
+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 27:
+Line 29:
-||ITM||>500km||ETM||7000.0m||||||
||PRM||313.8788m||PR2||-3.2547m||PR3||27.36m||
||SRM||313.8788m||SR2||-3.2547m||SR3||27.36m||
-Line 32:
+Line 31:
-||PRM||4.046mm||PR2||4.046mm||PR3||34.242mm||
||SRM||4.046mm||SR2||4.046mm||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 36:
+Line 37:
+||ITM (Sapphire) ||>666km ||
||PRM (Silica) ||>10000km ||
-Line 37:
+Line 40:
-||ITM (Sapphire)||>666km||
||PRM (Silica)||>10000km||
-Line 40:
+Line 41:
-=== g1=g2=0.586, 11.25MHz, 45MHz ===
This is an alternative parameter set.
Do not use these parameters.
+----
== 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 ||
-Line 44:
+Line 57:
-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||
-Line 52:
+Line 58:
-Radius of Curvatures (Positive for concave)
-Line 54:
+Line 59:
-||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 58:
+Line 60:
-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 ==
+'''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 ||