Size: 4916
Comment:
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Size: 4910
Comment:
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Deletions are marked like this. | Additions are marked like this. |
Line 11: | Line 11: |
||Wave length||1064|| ||nm|| ||Initial Laser Power||150|| ||W|| ||Injecting Laser Power into IFO||78.48 (in total), 75 (carrier) || ||W|| ||Modulation depth|| 0.3 for both || || || ||RF freq 1|| 11.25 (PM) || ||MHz|| ||RF freq 2|| 45.00 (PM) || ||MHz|| ||MC1 length|| 13.324109 || ||m|| ||MC2 length|| 13.324109 || ||m|| ||MC1 FSR|| || ||MHz|| ||MC2 FSR|| || ||MHz|| ||MC1 Finesse|| || ||MHz|| ||MC2 Finesse|| || ||MHz|| |
||Wave length || 1064 || ||nm|| ||Initial Laser Power || 150 || ||W|| ||Injecting Laser Power into IFO || 78.48 (in total), 75 (carrier) || ||W|| ||Modulation depth || 0.3 for both || || || ||RF freq 1 || 11.25M (PM) || ||Hz|| ||RF freq 2 || 45.00M (PM) || ||Hz|| ||MC1 length || 13.324109 || ||m|| ||MC2 length || B) 13.324109 || ||m|| ||MC1 Finesse || X-( TBD || || || ||MC2 Finesse || X-( TBD || || || |
Line 24: | Line 22: |
||Arm cavity Finesse || || || || | ||Arm cavity Finesse || 1550 || || || |
Line 27: | Line 25: |
||Arm cavity FSR || || ||MHz|| | |
Line 31: | Line 28: |
||PRC cavity FSR || || ||MHz|| | |
Line 45: | Line 41: |
||SRC detuning phase|| 0.05934 = 3.4 degree || 0 ||rad|| | ||SRC detuning phase|| 86.5 <:( 3.4 ??? || 90.0 ||degree|| |
Line 77: | Line 73: |
||Bulk loss (absorption) (large optics ??? for Sapphire: ???FM, EM) || :-? 20 || || ppm/cm || ||Bulk loss (absorption) (small optics ??? for Fused Silica: ???) || :-? 2.5 || || ppm/cm || |
||Bulk loss (absorption) (large optics ??? for Sapphire: ???FM, EM) || :-? 20 || || ppm || ||Bulk loss (absorption) (small optics ??? for Fused Silica: ???) || :-? 2.5 || || ppm || |
Line 83: | Line 79: |
||OMC input/output mirror reflectivity || X-( To be designed|| || || ||OMC end mirror reflectivity || X-( To be designed || || || |
||OMC input/output mirror reflectivity || X-( TBD || || || ||OMC end mirror reflectivity || X-( TBD || || || |
Line 86: | Line 82: |
||DC readout phase || 134.7 || 121.8 || degree || | |
Line 93: | Line 90: |
||Feed-Forward gain || -0.97 || || 1/(1-0.97) = 30 || | ||Feed-Forward gain || -0.97 (openloop) || 1/(1-0.97) = 30 (closed loop) || || |
Line 99: | Line 96: |
Length Sensing Scheme Review by Somiya (Japanese) [[attachment:lcgtrse.pdf]] | |
Line 101: | Line 97: |
Length Sensing Scheme Review for advLIGO by Somiya [[attachment:AdvLIGO-LSCv4.pdf]] |
Interferometer Parameters
Old parameter sets (before 2010)
(Classical-noise parameters are here) Parameter LCGT VRSE-D1 LCGT VRSE-B units Laser source Wave length 1064 nm Initial Laser Power 150 W Injecting Laser Power into IFO 78.48 (in total), 75 (carrier) W Modulation depth 0.3 for both RF freq 1 11.25M (PM) Hz RF freq 2 45.00M (PM) Hz MC1 length 13.324109 m MC2 length m MC1 Finesse MC2 Finesse Parameters of interferometer Arm cavity Finesse 1550 Arm power gain Arm power(single) MW Arm cavity cut-off frequency Hz PR gain PRC power on BS W PR cavity cut-off frequency Hz PR-Arm cut-off frequency Hz SR gain Signal band Hz MICH contrast Other losses in PRC Other losses in SRC Cavity Length Arm cavity length 3006.69 m PR cavity length 73.2826 m Asymmetry length 3.33103 m BS-FM length 25 m SR cavity length 73.2826 m SRC detuning phase 86.5 90.0 degree Mirror geometries or mechanical properties EM mass 30 kg FM mass 30 kg PRM mass kg SRM mass kg BS mass kg EM ROC 7113.900 m FM ROC 7113.900 m FM AR ROC m PRM ROC m SRM ROC m BS ROC Infinity m EM thickness 15 cm FM thickness 15 cm PRM thickness cm SRM thickness cm BS thickness cm Mirror optical properties EM Reflectivity 0.999945 FM Reflectivity 0.996 PRM Reflectivity 0.9 SRM Reflectivity 0.8464 = 0.92^2 BS Reflectivity 0.5 HR Coating Loss of EM, FM, PRM and SRM 45e-6 BS Loss 100e-6 Transmissivity 1 - R - Loss AR Transmissivity 0.999 AR Coating Loss Bulk loss (absorption) (large optics ??? for Sapphire: ???FM, EM) ppm Bulk loss (absorption) (small optics ??? for Fused Silica: ???) ppm Output Mode Cleaner OMC length 1.5 m OMC Finesse 2000 OMC input/output mirror reflectivity OMC end mirror reflectivity OMC MC FSR ??? MHz DC readout phase 134.7 121.8 degree Control Bandwidth Quantum efficiency 0.9 CARM control band width 30k Hz DARM control band width 200 Hz PRC control band width 50 Hz MICH control band width 50 Hz SRC control band width 50 Hz Feed-Forward gain -0.97 (openloop) 1/(1-0.97) = 30 (closed loop)
13.324109
TBD
TBD
3.4 ???
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
1000e-6
20
2.5
TBD
TBD
To do list to define parameters for 2009
Reference