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

Differences between revisions 60 and 119 (spanning 59 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	11.25M (PM)		Hz
RF freq 2	45.00M (AM)		Hz
MC1 length	10.0		m
MC2 length	13.324109		m
MC1 Finesse	TBD
MC2 Finesse	TBD
Parameters of interferometer
Arm cavity Finesse	1550 1546
Arm power gain	960 9984 = 960 x 10.4
Arm power (single arm)²	420.5 =\= 374.4 = 75 *9984 /2		kW
Arm cavity cut-off frequency			Hz
PR gain	11 10.4
PRC power on BS	780 = 75 * 10.4		W
PR cavity cut-off frequency			Hz
PR-Arm cut-off frequency			Hz
SR gain	11 (not checked yet)
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

Band-Width Special Working Group. (1)
Arm power was defined by sum of both arm powers. It should be a stored power of single arm. (2)

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

-  ⇤ ← Revision 60 as of 2010-06-08 08:04:58 → 
  Size: 4876
  Editor: DaisukeTatsumi
  Comment:
+   ← Revision 119 as of 2010-07-29 15:29:41 → ⇥
  Size: 5140
  Editor: DaisukeTatsumi
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 9:
-||<align="center">'''Parameter'''||<align="center":width="10%">'''LCGT VRSE-D'''<<FootNote([[http://gw.icrr.u-tokyo.ac.jp/JGWwiki/LCGT/subgroup/ifo/BW|Special Working Group Report]].)>>||<align="center":width="10%">'''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 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 (AM) || ||Hz||
||MC1 length                         || B) 10.0 || ||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                 || 1550 B) 1546 || || ||
||Arm power gain                     || 960 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''' B) =\= 374.4 = 75 *9984 /2|| ||kW||
||Arm cavity cut-off frequency       ||  || ||Hz||
||PR gain                            || 11 B) 10.4 || || ||
||PRC power on BS                    || B) 780 = 75 * 10.4 || ||W||
||PR cavity cut-off frequency        ||  || ||Hz||
||PR-Arm cut-off frequency           ||  || ||Hz||
||SR gain                            || 11 (not checked yet)|| || ||
||Signal band                        ||  || ||Hz||
||MICH contrast                      ||  || || ||
||Other losses in PRC                ||  || || ||
||Other losses in SRC                ||  || || ||
-Line 26:
+Line 38:
-||PRM-BS length     || 48.2826   || ||m||
||BS-FM X length    || 26.665515 || ||m||
||BS-FM Y length    || 23.334485 || ||m||
-Line 30:
+Line 39:
-||SR cavity length  ||           || ||m||
||SRM-BS length     ||           || ||m||
||SRC detuning phase|| 0.05934 = 3.4 degree || 0 ||rad||
||<bgcolor="#FFFF00":colspan="4"> '''Mirror geometries or mechanical properties''' ||
+||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''' ||
-Line 36:
+Line 45:
-||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 51:
-||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 47:
+Line 56:
-||EM thickness      || 15 || ||cm||
||FM thickness      || 15 || ||cm||
||PRM thickness     || <:( Not defined || ||cm||
||SRM thickness     || <:( Not defined || ||cm||
||BS thickness      || <:( Not defined || ||cm||
+||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||
-Line 56:
+Line 65:
-||SRM Reflectivity  || 0.8464 = 0.92^2 || || ||
+||SRM Reflectivity  || 0.8464 = 0.92^2^ || || ||
-Line 64:
+Line 73:
-||Bulk loss (absorption) (large optics: ???FM, EM) || :-? 20  || || ppm/cm ||
||Bulk loss (absorption) (small optics: ???)       || :-? 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 67:
+Line 76:
-||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 || ||
|| || || || || || ||
-Line 84:
+Line 77:
-||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||
+||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 ||
-Line 91:
+Line 85:
-||Frequency Stabilization band width   || 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||
+||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 102:
+Line 96:
-Length Sensing Scheme Review by Somiya (Japanese) [[attachment:lcgtrse.pdf]]
-Line 104:
+Line 97:
-Length Sensing Scheme Review for advLIGO by Somiya [[attachment:AdvLIGO-LSCv4.pdf]]