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← Revision 132 as of 2011-04-30 00:35:52 ⇥
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| Deletions are marked like this. | Additions are marked like this. |
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| (Classical-noise parameters are [[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise|here]]) | [[LCGT/subgroup/ifo/ISC/IFOParameters/BeforeBW|Old parameter sets]] (before 2010) (Classical-noise parameters are [[LCGT/subgroup/ifo/ISC/ClassicalNoise|here]]) |
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| ||Parameter||LCGT BRSE(2004)<<FootNote(2004 data referred to [[http://gw.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=30&version=1|LCGT design document 1.0]].)>>||LCGT BRSE(2007)<<FootNote(2007 data referred to [[http://gw.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=30|LCGT design document 2.0]] and [[attachment:LCGT/subgroup/ifo/ISC/CoreDocuments/TAC.ppt|TAC presentation]] at 2005/8/23)>>||LCGT BRSE(2009)||LCGT DRSE(2009)||units|| ||Wave length||1064||1064||1064||1064||nm|| ||Initial Laser Power||300||150||150||150||W|| ||Injecting Laser Power into IFO||100||75(carrier)||75||75||W|| ||Modulation depth||Not defined||Not defined|| || || || ||RF freq 1||15.025(AM)||9.98125(AM)|| || ||MHz|| ||RF freq 2||49.5825(PM)||59.8875(PM)|| || ||MHz|| ||MC1 length||9.755||9.755|| || ||m|| ||MC2 length||199.78||180.463?|| || ||m|| ||MC1 FSR||15.525||15.525|| || ||MHz|| ||MC2 FSR||0.75125||0.831771?|| || ||MHz|| ||MC1 Finesse||1720||1720|| || ||MHz|| ||MC2 Finesse||1000||1000|| || ||MHz|| || || || || || || || ||EM Reflectivity||0.99995||0.99995|| 0.99995 || 0.99995 || || ||FM Reflectivity||0.995||0.996|| 0.992 || 0.992 || || ||PRM Reflectivity||0.76||0.80|| 0.77 || 0.77 || || ||SRM Reflectivity||0.68||0.77|| 0.88 || 0.88 || || ||BS Reflectivity||0.5?||0.5?|| 0.5 || 0.5 || || ||EM Transmittance||2e-5||2e-5|| 3e-5 || 3e-5 || || ||FM Transmittance||0.00497||0.00399|| 0.00798 || 0.00798 || || ||PRM Transmittance||0.23997||0.19999|| 0.22998 || 0.22998 || || ||SRM Transmittance||0.31997||0.22999|| 0.11998 || 0.11998 || || ||BS Transmittance||0.49997?||0.49999?|| || || || ||EM Loss||3e-5||1e-5(3e-5?)|| 2e-5 || 2e-5 || || ||FM Loss||3e-5||1e-5(3e-5?)|| 2e-5 || 2e-5 || || ||PRM Loss||3e-5||1e-5(3e-5?)|| 2e-5 || 2e-5 || || ||SRM Loss||3e-5||1e-5(3e-5?)|| 2e-5 || 2e-5 || || ||BS Loss ||3e-5||1e-5(3e-5?)|| || || || || || || || || || || ||Arm cavity length||3000||3000||3000||3000||m|| ||PR cavity length||14.9899?||45?|| || ||m|| ||PRM-BS length||Not defined||Not defined|| || ||m|| ||BS-FM X length||Not defined||Not defined|| || ||m|| ||BS-FM Y length||Not defined||Not defined|| || ||m|| ||Asymmetry length||1.4990?||7.5?|| || ||m|| ||SR cavity length||17.9878?||45?|| || ||m|| ||SRM-BS length||Not determined||Not determined|| || ||m|| ||SRC detuning phase||pi/2||pi/2||pi/2|| 1.343 ||rad|| || || || || || || || ||Arm cavity FSR||0.05||0.05|| || ||MHz|| ||PRC cavity FSR||19.3166||6.7|| || ||MHz|| ||Arm cavity Finesse||1250||1548|| 777 || 777 || || ||Arm power gain||796||987|| || || || ||Arm power(single)||0.398||0.3859|| 0.202 || 0.202 ||MW|| ||PR gain||10||10.63|| 11 || 11 || || ||PRC power on BS||1000||797.14|| 825 || 825 ||W|| ||SR gain||10||14.68|| ? || N/A || || ||Arm cavity cut-off frequency|| ||16.14|| 31.8 || 31.8 ||Hz|| ||PR cavity cut-off frequency|| ||1.209e6|| || ||Hz|| ||PR-Arm cut-off frequency|| ||1.189|| 2.3 || 2.3 ||Hz|| ||Signal band|| ||236.9|| || ||Hz|| ||MICH contrast||0.995||0.995|| || || || ||Other losses in PRC||Not defined||1e-3|| 0.02/PRG || 0.02/PRG || || ||Other losses in SRC||Not defined|| || 0.02/SRG || 0.02/SRG || || || || || || || || || ||EM mass||50.9||30||30||30||kg|| ||FM mass||50.9||30||30||30||kg|| ||PRM mass||Not defined||Not defined|| || ||kg|| ||SRM mass||Not defined||Not defined|| || ||kg|| ||BS mass||Not defined||Not defined|| || ||kg|| || || || || || || || ||EM ROC||4500||4500||4500||4500||m|| ||FM ROC||Infinity||Infinity||Infinity||Infinity||m|| ||FM AR ROC||12||??||Infinity||Infinity||m|| ||PRM ROC||0.81||??|| || ||m|| ||SRM ROC||Not defined||Not defined|| || ||m|| ||BS ROC||Infinity||Infinity|| || ||m|| || || || || || || || ||EM AR Reflectivity||Not defined||1e-3|| || || || ||FM AR Reflectivity||Not defined||1e-3|| || || || ||PRM AR Reflectivity||Not defined||1e-3|| || || || ||SRM AR Reflectivity||Not defined||1e-3|| || || || ||BS AR Reflectivity||Not defined||1e-3|| || || || ||EM AR Loss||Not defined||Not defined|| || || || ||FM AR Loss||Not defined||Not defined|| || || || ||PRM AR Loss||Not defined||Not defined|| || || || ||SRM AR Loss||Not defined||Not defined|| || || || ||BS AR Loss||Not defined||Not defined|| || || || || || || || || || || ||EM absorption loss (bulk)||20||20|| || ||ppm/cm|| ||FM absorption loss (bulk)||20||20|| 20 || 20 ||ppm/cm|| ||EM absorption loss (coat)|||||| || ||ppm|| ||FM absorption loss (coat)|||||| <1 || <1 ||ppm|| ||PRM absorption loss||5||5|| || ||ppm/cm|| ||SRM absorption loss||5||5|| || ||ppm/cm|| ||BS absorption loss||5||5|| || ||ppm/cm|| ||EM thickness||18||15|| 15 || 15 ||cm|| ||FM thickness||18||15|| 15 || 15 ||cm|| ||PRM thickness||Not defined||Not defined|| || ||cm|| ||SRM thickness||Not defined||Not defined|| || ||cm|| ||BS thickness||Not defined||Not defined|| || ||cm|| ||EM bulk Loss||1000||1000|| || ||ppm|| ||FM bulk Loss||1000||1000|| || ||ppm|| ||PRM bulk Loss||1000||1000|| || ||ppm|| ||SRM bulk Loss||1000||1000|| || ||ppm|| ||BS bulk Loss||1000||1000|| || ||ppm|| || || || || || || || ||OMC input/output mirror reflectivity||0.8||0.8|| || || || ||OMC end mirror reflectivity||0.99995||0.99995|| || || || ||OMC length||0.07||0.07|| || ||m|| ||OMC MC FSR||4282||4282|| || ||MHz|| ||OMC Finesse||14||14|| || ||MHz|| || || || || || || || ||Quantum efficiency||Not defined||Not defined|| 0.9 || 0.9 || || ||Frequency Stabilization band width||10000||10000|| || ||Hz|| ||CARM control band width||Not defined||0.1|| || ||Hz|| ||DARM control band width||Not defined||1000|| || ||Hz|| ||PRC control band width||Not defined||1000|| || ||Hz|| ||MICH control band width||Not defined||10|| || ||Hz|| ||SRC control band width||Not defined||1000|| || ||Hz|| |
||<align="center":width="20%">'''Parameter'''||<align="center":width="15%">'''LCGT VRSE-D'''<<FootNote([[LCGT/subgroup/ifo/BW|Band-Width Special Working Group]].)>>||<align="center":width="15%">'''LCGT VRSE-B''' ||<align="center":width="5%"> units|| ||<bgcolor="#FFFF00":colspan="4"> '''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 (AM) || ||Hz|| ||<bgcolor="#FFFF00":colspan="4"> '''Primary parameters of interferometer''' || ||Arm cavity Finesse || 1546 || || || ||Arm cavity power gain || 960 || || || ||PR gain || 10.4 || || || ||Arm power (single arm)<<FootNote(Arm power was defined by sum of both arm powers. It should be a stored power of single arm.)>> || 374k = 75 * 10.4 * 960 /2|| ||W|| ||PRC power on BS || 780 = 75 * 10.4 || ||W|| ||<bgcolor="#FFFF00":colspan="4"> '''Cavity Length''' || ||Arm cavity length || 3000 || ||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|| ||<bgcolor="#FFFF00":colspan="4"> '''Mirror optical properties''' || ||EM Reflectivity || 0.999945 || || || ||FM Reflectivity || 0.996000 || || || ||PRM Reflectivity || 0.900000 || || || ||SRM Reflectivity || 0.846400 = 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 || :-? 1000e-6 || || || || || || || || ||Bulk loss (absorption) (large optics ??? for Sapphire: ???FM, EM) || :-? 20 || || ppm || ||Bulk loss (absorption) (small optics ??? for Fused Silica: ???) || :-? 2.5 || || ppm || || || || || || ||Arm cavity cut-off frequency || || ||Hz|| ||PR cavity cut-off frequency || || ||Hz|| ||PR-Arm cut-off frequency || || ||Hz|| ||SR gain || 24 || || || ||Signal band || || ||Hz|| ||MICH contrast || || || || ||Other losses in PRC || || || || ||Other losses in SRC || || || || || || || || || ||<bgcolor="#FFFF00":colspan="4"> '''Mirror geometries''' || ||EM mass || 30 || ||kg|| ||FM mass || 30 || ||kg|| ||PRM mass || <:( TBD || ||kg|| ||SRM mass || <:( TBD || ||kg|| ||BS mass || <:( TBD || ||kg|| || || || || || ||EM ROC || 1900 || ||m|| ||FM ROC || 1900 || ||m|| ||FM AR ROC || Flat || ||m|| ||PRM ROC || <:( TBD || ||m|| ||SRM ROC || <:( TBD || ||m|| ||BS ROC || Infinity || ||m|| || || || || || ||EM radius/thickness || 25 / 15 || ||cm|| ||FM radius/thickness || 25 / 15 || ||cm|| ||PRM radius/thickness || <:( TBD || ||cm|| ||SRM radius/thickness || <:( TBD || ||cm|| ||BS radius/thickness || <:( TBD || ||cm|| || || || || || ||<bgcolor="#FFFF00":colspan="4"> '''Mode Cleaner''' || ||MC1 length || B) 10.0 || ||m|| ||MC2 length || B) 13.324109 || ||m|| ||MC1 Finesse || X-( TBD || || || ||MC2 Finesse || X-( TBD || || || || || || || || ||<bgcolor="#FFFF00":colspan="4"> '''Output Mode Cleaner''' || ||OMC length || 1.5 || ||m|| ||OMC Finesse || 2000 || || || ||OMC input/output mirror reflectivity || X-( TBD || || || ||OMC end mirror reflectivity || X-( TBD || || || ||OMC MC FSR || ??? || ||MHz|| ||DC readout phase || 134.7 || 121.8 || degree || ||<bgcolor="#FFFF00":colspan="4"> '''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) || || || || || || || || |
| Line 123: | Line 101: |
| Length Sensing Scheme Review by Somiya (Japanese) [[attachment:lcgtrse.pdf]] | |
| Line 125: | Line 102: |
| 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 (AM) |
|
Hz |
Primary parameters of interferometer |
|||
Arm cavity Finesse |
1546 |
|
|
Arm cavity power gain |
960 |
|
|
PR gain |
10.4 |
|
|
Arm power (single arm)2 |
374k = 75 * 10.4 * 960 /2 |
|
W |
PRC power on BS |
780 = 75 * 10.4 |
|
W |
Cavity Length |
|||
Arm cavity length |
3000 |
|
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 optical properties |
|||
EM Reflectivity |
0.999945 |
|
|
FM Reflectivity |
0.996000 |
|
|
PRM Reflectivity |
0.900000 |
|
|
SRM Reflectivity |
0.846400 = 0.922 |
|
|
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 |
|
|
|
|
Arm cavity cut-off frequency |
|
|
Hz |
PR cavity cut-off frequency |
|
|
Hz |
PR-Arm cut-off frequency |
|
|
Hz |
SR gain |
24 |
|
|
Signal band |
|
|
Hz |
MICH contrast |
|
|
|
Other losses in PRC |
|
|
|
Other losses in SRC |
|
|
|
|
|
|
|
Mirror geometries |
|||
EM mass |
30 |
|
kg |
FM mass |
30 |
|
kg |
PRM mass |
|
|
kg |
SRM mass |
|
|
kg |
BS mass |
|
|
kg |
|
|
|
|
EM ROC |
1900 |
|
m |
FM ROC |
1900 |
|
m |
FM AR ROC |
Flat |
|
m |
PRM ROC |
|
|
m |
SRM ROC |
|
|
m |
BS ROC |
Infinity |
|
m |
|
|
|
|
EM radius/thickness |
25 / 15 |
|
cm |
FM radius/thickness |
25 / 15 |
|
cm |
PRM radius/thickness |
|
|
cm |
SRM radius/thickness |
|
|
cm |
BS radius/thickness |
|
|
cm |
|
|
|
|
Mode Cleaner |
|||
MC1 length |
|
|
m |
MC2 length |
|
|
m |
MC1 Finesse |
|
|
|
MC2 Finesse |
|
|
|
|
|
|
|
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) |
|
|
|
|
|
|
1000e-6 
TBD 
10.0 
TBD To do list to define parameters for 2009
Reference
Arm power was defined by sum of both arm powers. It should be a stored power of single arm. (2)