|
Size: 5842
Comment:
|
Size: 5876
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 9: | Line 9: |
| Line 20: | Line 21: |
| ||Folding Angle||||||||||<style="text-align:center"> || | ||Folding Angle ||||||||||<style="text-align:center"> || |
| Line 47: | Line 48: |
| ||Transmission@532nm ||0.2(+/-0.1) ||Transmission of ITM must be larger than ETM@532nm || | ||Transmission@532nm ||0.06(+0/-0.005) ||Transmission of ITM must be larger than ETM@532nm || |
| Line 63: | Line 64: |
| ||Transmission@532nm ||0.2(+/-0.01) ||Transmission of ETM must be smaller than ITM@532nm || | ||Transmission@532nm ||0.06(+0/-0.005) ||Transmission of ETM must be smaller than ITM@532nm || |
| Line 85: | Line 86: |
| Line 110: | Line 113: |
| Line 133: | Line 138: |
| Line 134: | Line 141: |
| ||HR Radius of Curvature ||-2.9872(+/-0.01)m |||| | ||HR Radius of Curvature ||-2.9872(+/-0.01)m || || |
| Line 144: | Line 151: |
| Line 145: | Line 155: |
| ||HR Radius of Curvature ||24.9165(+/-0.01)m |||| | ||HR Radius of Curvature ||24.9165(+/-0.01)m || || |
| Line 154: | Line 164: |
Actual Optical Parameters of the Main Interferometer
Contents
Optical Parameters
Interferometer Diagram
Note: In this figure POP is taken at the transmission of PR3, because it is easier to draw. In reality, POP will be taken at the transmission of PR2.
ITM=1.9km, ETM=1.9km, PRC=16.5deg, SRC=17.5deg, 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 |
14.7615 |
Lp2 |
11.0661m |
Lp3 |
15.7638m |
Lmi |
25m |
Lmx |
26.6649m |
Lmy |
23.3351m |
Ls1 |
14.7412m |
Ls2 |
11.1115m |
Ls3 |
15.7386m |
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.
Radius of Curvatures (Positive for concave)
ITM |
1900.0m |
ETM |
1900.0m |
|
|
PRM |
458.1285m |
PR2 |
-3.0764m |
PR3 |
24.9165m |
SRM |
458.1285m |
SR2 |
-2.9872m |
SR3 |
24.9165m |
Beam Spot Size (1/e^2 radius)
ITM |
35.3mm |
ETM |
35.3mm |
|
|
PRM |
4.457mm |
PR2 |
4.457mm |
PR3 |
36.639mm |
SRM |
4.308mm |
SR2 |
4.328mm |
SR3 |
36.666mm |
Mirror Specs
Test Masses
ITM
HR Radius of Curvature |
1.90(+/-0.0095)km |
0.5% error |
AR Radius of Curvature |
Flat (>100km) |
As flat as possible |
AR Wedge Angle |
0.025+0/-0.01deg |
|
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 |
0.06(+0/-0.005) |
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 |
1.9(+/-0.0095)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 |
0.06(+0/-0.005) |
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 |
BS
Diameter |
370mm +/- 0.25mm |
|
Thickness |
80mm +/- 0.5mm |
|
HR Radius of Curvature |
Flat (>500km) |
As flat as possible |
AR Radius of Curvature |
Flat (>500km) |
As flat as possible |
AR Wedge Angle |
0.08+0/-0.01deg |
|
Incident Angle |
44.9684deg +/-0.05deg |
|
Transmission@1064nm |
50% +/-1% |
|
HR Loss@1064nm |
<100ppm |
|
Transmission@532nm |
>0.9 |
|
HR Loss@532nm |
<1% |
|
AR Reflectivity@1064nm |
<50ppm |
|
AR Reflectivity@532nm |
<5% |
As small as possible |
PRM
HR Radius of Curvature |
458.1285m(+/-20)m |
5% error |
AR Radius of Curvature |
Flat (>100km) |
As flat as possible |
AR Wedge Angle |
TBD |
|
Transmission@1064nm |
0.1(+0.001/-0.0) |
|
HR Loss@1064nm |
<45ppm |
|
AR Reflectivity@1064nm |
<50ppm |
|
PR2
HR Radius of Curvature |
-3.0764(+/-0.01)m |
|
AR Radius of Curvature |
Flat (>100km) |
As flat as possible |
AR Wedge Angle |
TBD |
|
Transmission@1064nm |
500ppm(+/-50ppm) |
|
HR Loss@1064nm |
<45ppm |
|
Transmission@532nm |
> 0.5 |
As large as possible |
HR Loss@532nm |
<10% |
|
AR Reflectivity@1064nm |
<1000ppm |
As small as possible |
AR Reflectivity@532nm |
<5% |
As small as possible |
PR3
HR Radius of Curvature |
24.9165(+/-0.01)m |
|
AR Radius of Curvature |
Flat (>100km) |
As flat as possible |
AR Wedge Angle |
TBD |
|
Transmission@1064nm |
<50ppm |
As small as possible |
HR Loss@1064nm |
<45ppm |
|
Transmission@532nm |
< 0.1 |
As small as possible |
HR Loss@532nm |
<10% |
|
AR Reflectivity@1064nm |
<1000ppm |
As small as possible |
AR Reflectivity@532nm |
<5% |
As small as possible |
SRM
HR Radius of Curvature |
458.1285m(+/-20)m |
5% error |
AR Radius of Curvature |
Flat (>100km) |
As flat as possible |
AR Wedge Angle |
TBD |
|
Transmission@1064nm |
0.1536(+/-0.001) |
|
HR Loss@1064nm |
<45ppm |
|
AR Reflectivity@1064nm |
<50ppm |
|
SR2
HR Radius of Curvature |
-2.9872(+/-0.01)m |
|
AR Radius of Curvature |
Flat (>100km) |
As flat as possible |
AR Wedge Angle |
TBD |
|
Transmission@1064nm |
500ppm(+/-50ppm) |
|
HR Loss@1064nm |
<45ppm |
|
Transmission@532nm |
> 0.5 |
As large as possible |
HR Loss@532nm |
<10% |
|
AR Reflectivity@1064nm |
<1000ppm |
As small as possible |
AR Reflectivity@532nm |
<5% |
As small as possible |
SR3
HR Radius of Curvature |
24.9165(+/-0.01)m |
|
AR Radius of Curvature |
Flat (>100km) |
As flat as possible |
AR Wedge Angle |
TBD |
|
Transmission@1064nm |
<50ppm |
As small as possible |
HR Loss@1064nm |
<45ppm |
|
Transmission@532nm |
< 0.1 |
As small as possible |
HR Loss@532nm |
<10% |
|
AR Reflectivity@1064nm |
<1000ppm |
As small as possible |
AR Reflectivity@532nm |
<5% |
As small as possible |