Diff for "LCGT/subgroup/ifo/ISC/IFOParameters"

Differences between revisions 45 and 82 (spanning 37 versions)

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	11.25 (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
Parameters of interferometer
Arm cavity Finesse
Arm power gain
Arm power(single)			MW
Arm cavity FSR			MHz
Arm cavity cut-off frequency			Hz
PR gain
PRC power on BS			W
PRC cavity FSR			MHz
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	0.05934 = 3.4 degree	0	rad
Mirror geometries or mechanical properties
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 thickness	15		cm
FM thickness	15		cm
PRM thickness	TBD		cm
SRM thickness	TBD		cm
BS thickness	TBD		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	1000e-6

Bulk loss (absorption) (large optics ??? for Sapphire: ???FM, EM)	20		ppm/cm
Bulk loss (absorption) (small optics ??? for Fused Silica: ???)	2.5		ppm/cm

Output Mode Cleaner
OMC length	1.5		m
OMC Finesse	2000
OMC input/output mirror reflectivity	To be designed
OMC end mirror reflectivity	To be designed
OMC MC FSR	???		MHz
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		1/(1-0.97) = 30

To do list to define parameters for 2009

Reference

Length Sensing Scheme Review by Somiya (Japanese) lcgtrse.pdf

Length Sensing Scheme Review for advLIGO by Somiya AdvLIGO-LSCv4.pdf

Band-Width Special Working Group. (1)

LCGT/subgroup/ifo/ISC/IFOParameters (last edited 2011-04-30 00:35:52 by OsamuMiyakawa)

-  ⇤ ← Revision 45 as of 2010-06-08 05:30:59 → 
  Size: 5647
  Editor: DaisukeTatsumi
  Comment:
+   ← Revision 82 as of 2010-06-08 09:28:09 → ⇥
  Size: 4916
  Editor: DaisukeTatsumi
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 9:
-||<align="center">'''Parameter'''||'''LCGT VRSE-D'''<<FootNote([[http://gw.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=30&version=1|Special Working Group Report]].)>>||'''LCGT VRSE-B''' ||units||
+||<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||
 Line 23:
+||<bgcolor="#FFFF00":colspan="4"> '''Parameters of interferometer''' ||
||Arm cavity Finesse                 ||  || || ||
||Arm power gain                     ||  || || ||
||Arm power(single)                  ||  || ||MW||
||Arm cavity FSR                     ||  || ||MHz||
||Arm cavity cut-off frequency       ||  || ||Hz||
||PR gain                            ||  || || ||
||PRC power on BS                    ||  || ||W||
||PRC cavity FSR                     ||  || ||MHz||
||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                ||  || || ||
-Line 26:
+Line 42:
-||PRM-BS length     || 48.2826   || ||m||
||BS-FM X length    || 26.665515 || ||m||
||BS-FM Y length    || 23.334485 || ||m||
-Line 30:
+Line 43:
-||SR cavity length  ||           || ||m||
||SRM-BS length     ||           || ||m||
+||BS-FM length      || 25        || ||m||
||SR cavity length  || 73.2826   || ||m||
-Line 33:
+Line 46:
-||<bgcolor="#FFFF00":colspan="4"> '''Mirror optical properties''' ||
+||<bgcolor="#FFFF00":colspan="4"> '''Mirror geometries or mechanical properties''' ||
-Line 36:
+Line 49:
-||PRM mass          || Not defined || ||kg||
||SRM mass          || Not defined || ||kg||
||BS mass           || Not defined || ||kg||
+||PRM mass          || <:( TBD || ||kg||
||SRM mass          || <:( TBD || ||kg||
||BS mass           || <:( TBD || ||kg||
-Line 42:
+Line 55:
-||FM AR ROC         || Not defined || ||m||
||PRM ROC           || Not defined || ||m||
||SRM ROC           || Not defined || ||m||
+||FM AR ROC         || <:( TBD || ||m||
||PRM ROC           || <:( TBD || ||m||
||SRM ROC           || <:( TBD || ||m||
-Line 46:
+Line 59:
+|| || || || ||
||EM thickness      || 15 || ||cm||
||FM thickness      || 15 || ||cm||
||PRM thickness     || <:( TBD || ||cm||
||SRM thickness     || <:( TBD || ||cm||
||BS thickness      || <:( TBD || ||cm||
-Line 52:
+Line 71:
-||EM Loss           || 45e-6    ||  || ||
||FM Loss           || 45e-6    ||  || ||
||PRM Loss          || 45e-6    ||  || ||
||SRM Loss          || 45e-6    ||  || ||
+||HR Coating Loss of EM, FM, PRM and SRM || 45e-6 ||  || ||
-Line 57:
+Line 73:
-|| Transmittance    || 1 - R - Loss ||    || ||
|| || || || || || ||
||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 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||
+|| Transmissivity   || 1 - R - Loss ||    || ||
||AR Transmissivity || 0.999    ||  || ||
||AR Coating Loss   || :-? 1000e-6  || || ||
|| || || || ||
||Bulk loss (absorption) (large optics ??? for Sapphire: ???FM, EM) || :-? 20  || || ppm/cm ||
||Bulk loss (absorption) (small optics ??? for Fused Silica: ???)       || :-? 2.5 || || ppm/cm ||
|| || || || ||
||<bgcolor="#FFFF00":colspan="4"> '''Output Mode Cleaner''' ||
||OMC length                           || 1.5   || ||m||
||OMC Finesse                          || 2000  || || ||
||OMC input/output mirror reflectivity || X-( To be designed|| || ||
||OMC end mirror reflectivity          || X-( To be designed || || ||
||OMC MC FSR                           || ???   || ||MHz||
||<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 || || 1/(1-0.97) = 30 ||