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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|| [[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ToDo|To do list]] to define parameters for 2009 ------ == Reference == Length Sensing Scheme Review by Somiya (Japanese) [[attachment:lcgtrse.pdf]] Length Sensing Scheme Review for advLIGO by Somiya [[attachment:AdvLIGO-LSCv4.pdf]] ---- |
Confirmation of the current status
The first task of this working group is to establish a consensus between the members about the currently proposed ISC scheme. We will confirm what has been done so far in what degree of detail. Then decide what should be done next.
Parameters
(Classical-noise parameters are here)