Size: 5141
Comment:
|
Size: 6682
Comment:
|
Deletions are marked like this. | Additions are marked like this. |
Line 8: | Line 8: |
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 (beam from PR3 to PR2). |
|
Line 9: | Line 11: |
=== g1=-0.7857, g2=-0.6043, 16.875MHz, 45MHz === | === ITM=1.9km, ETM=1.9km, PRC=16.5deg, SRC=17.5deg, 16.875MHz, 45MHz === |
Line 16: | Line 18: |
||Lp1 ||14.7606 ||Lp2 ||11.0669m ||Lp3 ||15.7638m || | ||Lp1 ||14.7615 ||Lp2 ||11.0661m ||Lp3 ||15.7638m || |
Line 18: | Line 20: |
||Ls1 ||14.7606m ||Ls2 ||11.0669m ||Ls3 ||15.7638m || ||Folding angle ||0.6860[deg] ||||||||<style="text-align:center"> || |
||Ls1 ||14.7412m ||Ls2 ||11.1115m ||Ls3 ||15.7386m || ||Folding Angle ||||||||||<style="text-align:center"> || |
Line 25: | Line 27: |
||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 || |
||ITM ||1900.0m ||ETM ||1900.0m ||||<style="text-align:center"> || ||PRM ||458.1285m ||PR2 ||-3.0764m ||PR3 ||24.9165m || ||SRM ||458.1285m ||SR2 ||-2.9872m ||SR3 ||24.9165m || |
Line 31: | Line 33: |
||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 || |
||ITM ||35.3mm ||ETM ||35.3mm ||||<style="text-align:center"> || ||PRM ||4.457mm ||PR2 ||4.457mm ||PR3 ||36.639mm || ||SRM ||4.308mm ||SR2 ||4.328mm ||SR3 ||36.666mm || |
Line 38: | Line 40: |
See, also, http://gwwiki.icrr.u-tokyo.ac.jp/optics/database.cgi . | |
Line 40: | Line 43: |
||HR Radius of Curvature ||1.68(+/-0.008)km ||0.5% error || | ||Diameter ||220mm || || ||Thickness ||150mm || || ||HR Radius of Curvature ||1.90(+/-0.0095)km ||0.5% error || |
Line 42: | Line 47: |
||AR Wedge Angle ||0.2+/-0.002deg || || | ||AR Wedge Angle ||0.025+0/-0.002deg ||Wedge direction: seen from the HR surface, 9 o'clock is thickest for both ITMX and ITMY. || |
Line 46: | Line 51: |
||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 56: | Line 61: |
||HR Radius of Curvature ||1.87(+/-0.009)km ||0.5% error || | ||Diameter ||220mm || || ||Thickness ||150mm || || ||HR Radius of Curvature ||1.9(+/-0.0095)km ||0.5% error || |
Line 58: | Line 65: |
||AR Wedge Angle ||0.2+/-0.1deg || || | ||AR Wedge Angle ||0.05+/-0.01deg ||Wedge direction: Seen from the HR surface, 3 o'clock is thickest for ETMX, 9 o'clock is thickest for ETMY. || |
Line 62: | Line 69: |
||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 68: | Line 75: |
'''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 ||(99.40% for s-pol, 97.85% for p-pol designed) || ||HR Loss@532nm ||<1% || || ||AR Reflectivity@1064nm ||<50ppm || || ||AR Reflectivity@532nm ||<5% ||As small as possible || |
|
Line 69: | Line 96: |
||HR Radius of Curvature ||303.96m(+/-1.5)m ||0.5% error || | ||Diameter ||250mm || || ||Thickness ||100mm || || ||HR Radius of Curvature ||458.1285m(+/-20)m ||5% error || |
Line 76: | Line 105: |
Line 77: | Line 109: |
||HR Radius of Curvature ||-2.763(+/-0.01)m ||0.5% error || | ||Diameter ||250mm || || ||Thickness ||100mm || || ||HR Radius of Curvature ||-3.0764(+/-0.01)m || || |
Line 79: | Line 113: |
||AR Wedge Angle ||TBD || || | ||AR Wedge Angle ||2.042 deg ||measured|| |
Line 84: | Line 118: |
||AR Reflectivity@1064nm ||<1000ppm ||As small as possible|| | ||AR Reflectivity@1064nm ||<1000ppm ||As small as possible || |
Line 87: | Line 121: |
Line 88: | Line 125: |
||HR Radius of Curvature ||24.57(+/-0.1)m ||0.5% error || | ||Diameter ||250mm || || ||Thickness ||100mm || || ||HR Radius of Curvature ||24.9165(+/-0.01)m || || |
Line 90: | Line 129: |
||AR Wedge Angle ||TBD || || | ||AR Wedge Angle ||2.019 deg ||measured|| |
Line 95: | Line 134: |
||AR Reflectivity@1064nm ||<1000ppm ||As small as possible|| | ||AR Reflectivity@1064nm ||<1000ppm ||As small as possible || |
Line 99: | Line 138: |
Line 100: | Line 141: |
||HR Radius of Curvature ||303.96m(+/-1.5)m ||0.5% error || | ||Diameter ||250mm || || ||Thickness ||100mm || || ||HR Radius of Curvature ||458.1285m(+/-20)m ||5% error || |
Line 107: | Line 150: |
Line 108: | Line 154: |
||HR Radius of Curvature ||-2.776(+/-0.01)m ||0.5% error || | ||Diameter ||250mm || || ||Thickness ||100mm || || ||HR Radius of Curvature ||-2.9872(+/-0.01)m || || |
Line 110: | Line 158: |
||AR Wedge Angle ||TBD || || | ||AR Wedge Angle ||2.096 deg ||measured|| |
Line 115: | Line 163: |
||AR Reflectivity@1064nm ||<1000ppm ||As small as possible|| | ||AR Reflectivity@1064nm ||<1000ppm ||As small as possible || |
Line 118: | Line 166: |
Line 119: | Line 170: |
||HR Radius of Curvature ||24.58(+/-0.1)m ||0.5% error || | ||Diameter ||250mm || || ||Thickness ||100mm || || ||HR Radius of Curvature ||24.9165(+/-0.01)m || || |
Line 121: | Line 174: |
||AR Wedge Angle ||TBD || || | ||AR Wedge Angle ||2.026 deg ||measured|| |
Line 126: | Line 179: |
||AR Reflectivity@1064nm ||<1000ppm ||As small as possible|| | ||AR Reflectivity@1064nm ||<1000ppm ||As small as possible || |
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 (beam from PR3 to 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
See, also, http://gwwiki.icrr.u-tokyo.ac.jp/optics/database.cgi .
Test Masses
ITM
Diameter |
220mm |
|
Thickness |
150mm |
|
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/-0.002deg |
Wedge direction: seen from the HR surface, 9 o'clock is thickest for both ITMX and ITMY. |
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
Diameter |
220mm |
|
Thickness |
150mm |
|
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 |
0.05+/-0.01deg |
Wedge direction: Seen from the HR surface, 3 o'clock is thickest for ETMX, 9 o'clock is thickest for ETMY. |
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 |
(99.40% for s-pol, 97.85% for p-pol designed) |
HR Loss@532nm |
<1% |
|
AR Reflectivity@1064nm |
<50ppm |
|
AR Reflectivity@532nm |
<5% |
As small as possible |
PRM
Diameter |
250mm |
|
Thickness |
100mm |
|
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
Diameter |
250mm |
|
Thickness |
100mm |
|
HR Radius of Curvature |
-3.0764(+/-0.01)m |
|
AR Radius of Curvature |
Flat (>100km) |
As flat as possible |
AR Wedge Angle |
2.042 deg |
measured |
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
Diameter |
250mm |
|
Thickness |
100mm |
|
HR Radius of Curvature |
24.9165(+/-0.01)m |
|
AR Radius of Curvature |
Flat (>100km) |
As flat as possible |
AR Wedge Angle |
2.019 deg |
measured |
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
Diameter |
250mm |
|
Thickness |
100mm |
|
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
Diameter |
250mm |
|
Thickness |
100mm |
|
HR Radius of Curvature |
-2.9872(+/-0.01)m |
|
AR Radius of Curvature |
Flat (>100km) |
As flat as possible |
AR Wedge Angle |
2.096 deg |
measured |
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
Diameter |
250mm |
|
Thickness |
100mm |
|
HR Radius of Curvature |
24.9165(+/-0.01)m |
|
AR Radius of Curvature |
Flat (>100km) |
As flat as possible |
AR Wedge Angle |
2.026 deg |
measured |
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 |