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

Differences between revisions 80 and 124 (spanning 44 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
Primary parameters of interferometer
Arm cavity Finesse	1546
Arm cavity power gain	960
PR gain	10.4
Arm power (single arm)²	374 = 75 * 10.4 * 960 /2		kW
PRC power on BS	780 = 75 * 10.4		W
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
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 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	1000e-6

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

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

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 80 as of 2010-06-08 09:25:39 → 
  Size: 4874
  Editor: DaisukeTatsumi
  Comment:
+   ← Revision 124 as of 2010-07-29 16:44:54 → ⇥
  Size: 5115
  Editor: DaisukeTatsumi
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 9:
-||<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|Special Working Group Report]].)>>||<align="center":width="15%">'''LCGT VRSE-B''' ||<align="center":width="5%"> 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||
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-||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||
||<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||
+||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"> '''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.)>> || 374 = 75 * 10.4 * 960 /2|| ||kW||
||PRC power on BS                    || 780 = 75 * 10.4 || ||W||
||Arm cavity cut-off frequency       ||      || ||Hz||
||PR cavity cut-off frequency        ||      || ||Hz||
||PR-Arm cut-off frequency           ||      || ||Hz||
||SR gain                            ||  24  || ||  ||
||Signal band                        ||     || ||Hz||
-Line 45:
+Line 41:
-||SRC detuning phase|| 0.05934 = 3.4 degree || 0 ||rad||
||<bgcolor="#FFFF00":colspan="4"> '''Mirror geometries or mechanical properties''' ||
+||SRC detuning phase|| 86.5 <:( 3.4 ???     ||  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 ||
|| || || || ||
||<bgcolor="#FFFF00":colspan="4"> '''Mirror geometries''' ||
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+Line 71:
-||EM thickness      || 15 || ||cm||
||FM thickness      || 15 || ||cm||
||PRM thickness     || <:( TBD || ||cm||
||SRM thickness     || <:( TBD || ||cm||
||BS 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: ???FM, EM) || :-? 20  || || ppm/cm ||
||Bulk loss (absorption) (small optics: ???)       || :-? 2.5 || || ppm/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 83:
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-||OMC input/output mirror reflectivity || X-( To be designed|| || ||
||OMC end mirror reflectivity          || X-( To be designed || || ||
+||OMC input/output mirror reflectivity || X-( TBD || || ||
||OMC end mirror reflectivity          || X-( TBD || || ||
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+||DC readout phase                     || 134.7 || 121.8 || degree ||
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+Line 91:
-||Feed-Forward gain                    || -0.97 || || 1/(1-0.97) = 30 ||
+||Feed-Forward gain                    || -0.97 (openloop), 1/(1-0.97) = 30 (closed loop) || || ||
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+Line 97:
-Length Sensing Scheme Review by Somiya (Japanese) [[attachment:lcgtrse.pdf]]
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+Line 98:
-Length Sensing Scheme Review for advLIGO by Somiya [[attachment:AdvLIGO-LSCv4.pdf]]