5878
Comment:
|
5069
|
Deletions are marked like this. | Additions are marked like this. |
Line 9: | Line 9: |
||Parameter||LCGT VRSE-D (2010)<<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 VRSE-B (2010)<<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)>> ||units|| || || || || || ||Wave length||1064|| ||nm|| ||Initial Laser Power||150|| ||W|| ||Injecting Laser Power into IFO||75 (carrier) = 78.48 (in total) || ||W|| ||Modulation depth|| 0.3 for both || || || ||RF freq 1|| 11.25 (PM) || ||MHz|| ||RF freq 2|| 45.00 (PM) || ||MHz|| ||MC1 length|| || ||m|| ||MC2 length|| || ||m|| ||MC1 FSR|| || ||MHz|| ||MC2 FSR|| || ||MHz|| ||MC1 Finesse|| || ||MHz|| ||MC2 Finesse|| || ||MHz|| || || || || || ||EM Reflectivity || 0.99995 || 0.99995 || || ||FM Reflectivity || || || || ||PRM Reflectivity || || || || ||SRM Reflectivity || || || || ||BS Reflectivity || || || || ||EM Transmittance || || || || ||FM Transmittance || || || || ||PRM Transmittance || || || || ||SRM Transmittance || || || || ||BS Transmittance || || || || ||EM Loss || 45e-6 || || || ||FM Loss || 45e-6 || || || ||PRM Loss || 45e-6 || || || ||SRM Loss || 45e-6 || || || ||BS Loss || 45e-6 || || || || || || || || |
||<align="center":width="20%">'''Parameter'''||<align="center":width="15%">'''LCGT VRSE-D'''<<FootNote([[http://gw.icrr.u-tokyo.ac.jp/JGWwiki/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 (PM) || ||Hz|| ||MC1 length || 13.324109 || ||m|| ||MC2 length || B) 13.324109 || ||m|| ||MC1 Finesse || X-( TBD || || || ||MC2 Finesse || X-( TBD || || || ||<bgcolor="#FFFF00":colspan="4"> '''Parameters of interferometer''' || ||Arm cavity Finesse || B) 1546 || || || ||Arm power gain || B) 9984 = 960 x 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.)>> || 420.5 || ||kW|| ||Arm cavity cut-off frequency || || ||Hz|| ||PR gain || B) 10.4 || || || ||PRC power on BS || B) 876 || ||W|| ||PR cavity cut-off frequency || || ||Hz|| ||PR-Arm cut-off frequency || || ||Hz|| ||SR gain || 11 || || || ||Signal band || || ||Hz|| ||MICH contrast || || || || ||Other losses in PRC || || || || ||Other losses in SRC || || || || ||<bgcolor="#FFFF00":colspan="4"> '''Cavity Length''' || |
Line 42: | Line 38: |
||PRM-BS length || 48.2826 || ||m|| ||BS-FM X length || 26.665515 || ||m|| ||BS-FM Y length || 23.334485 || ||m|| |
|
Line 46: | Line 39: |
||SR cavity length ||17.9878?||45?|| || ||m|| ||SRM-BS length ||Not determined||Not determined|| || ||m|| ||SRC detuning phase|| 0.05934 || pi/2 || ||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 || 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|| |
||BS-FM length || 25 || ||m|| ||SR cavity length || 73.2826 || ||m|| ||SRC detuning phase|| 86.5 <:( 3.4 ??? || 90.0 ||degree|| ||<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 || 7113.900 || ||m|| ||FM ROC || 7113.900 || ||m|| ||FM AR ROC || <:( TBD || ||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"> '''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 || :-? 1000e-6 || || || || || || || || ||Bulk loss (absorption) (large optics ??? for Sapphire: ???FM, EM) || :-? 20 || || ppm || ||Bulk loss (absorption) (small optics ??? for Fused Silica: ???) || :-? 2.5 || || ppm || || || || || || ||<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 126: | Line 96: |
Length Sensing Scheme Review by Somiya (Japanese) [[attachment:lcgtrse.pdf]] | |
Line 128: | 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 |
13.324109 |
|
m |
MC1 Finesse |
TBD |
|
|
MC2 Finesse |
TBD |
|
|
Parameters of interferometer |
|||
Arm cavity Finesse |
1546 |
|
|
Arm power gain |
9984 = 960 x 10.4 |
|
|
Arm power (single arm)2 |
420.5 |
|
kW |
Arm cavity cut-off frequency |
|
|
Hz |
PR gain |
10.4 |
|
|
PRC power on BS |
876 |
|
W |
PR cavity cut-off frequency |
|
|
Hz |
PR-Arm cut-off frequency |
|
|
Hz |
SR gain |
11 |
|
|
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 3.4 ??? |
90.0 |
degree |
Mirror geometries |
|||
EM mass |
30 |
|
kg |
FM mass |
30 |
|
kg |
PRM mass |
TBD |
|
kg |
SRM mass |
TBD |
|
kg |
BS mass |
TBD |
|
kg |
|
|
|
|
EM ROC |
7113.900 |
|
m |
FM ROC |
7113.900 |
|
m |
FM AR ROC |
TBD |
|
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 |
Mirror optical properties |
|||
EM Reflectivity |
0.999945 |
|
|
FM Reflectivity |
0.996 |
|
|
PRM Reflectivity |
0.9 |
|
|
SRM Reflectivity |
0.8464 = 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 |
1000e-6 |
|
|
|
|
|
|
Bulk loss (absorption) (large optics ??? for Sapphire: ???FM, EM) |
20 |
|
ppm |
Bulk loss (absorption) (small optics ??? for Fused Silica: ???) |
2.5 |
|
ppm |
|
|
|
|
Output Mode Cleaner |
|||
OMC length |
1.5 |
|
m |
OMC Finesse |
2000 |
|
|
OMC input/output mirror reflectivity |
TBD |
|
|
OMC end mirror reflectivity |
TBD |
|
|
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) |
|
|
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)