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Size: 2850
Comment:
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Size: 2989
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 36: | Line 36: |
| ==== Lens effect (effective focal length seen from the AR side) ==== ||ITM (Sapphire) ||>666km || ||PRM (Silica) ||>10000km || |
|
| Line 70: | Line 65: |
| ||AR Reflectivity@1064nm ||200(+100/-0)ppm || || | ||AR Reflectivity@1064nm ||<50ppm || || |
| Line 72: | Line 67: |
'''PRM''' ||HR Radius of Curvature ||303.96m(+/-1.5)m ||0.5% error || ||AR Radius of Curvature ||Flat (>100km) ||As flat as possible || ||AR Wedge Angle ||TBD || || ||Transmission@1064nm ||0.1 || || ||HR Loss@1064nm ||<45ppm || || ||AR Reflectivity@1064nm ||<50ppm || || |
Actual Optical Parameters of the Main Interferometer
Contents
Optical Parameters
Interferometer 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 |
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 |
<50ppm |
|
AR Reflectivity@532nm |
<5% |
As small as possible |
PRM
HR Radius of Curvature |
303.96m(+/-1.5)m |
0.5% error |
AR Radius of Curvature |
Flat (>100km) |
As flat as possible |
AR Wedge Angle |
TBD |
|
Transmission@1064nm |
0.1 |
|
HR Loss@1064nm |
<45ppm |
|
AR Reflectivity@1064nm |
<50ppm |
|