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

Differences between revisions 82 and 103 (spanning 21 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 (PM)		Hz
MC1 length	13.324109		m
MC2 length	13.324109		m
MC1 Finesse	TBD
MC2 Finesse	TBD
Parameters of interferometer
Arm cavity Finesse	1550
Arm power gain	1.1 × 10⁴
Arm power (single arm)²	420.5		kW
Arm cavity cut-off frequency			Hz
PR gain	11
PRC power on BS			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

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 82 as of 2010-06-08 09:28:09 → 
  Size: 4916
  Editor: DaisukeTatsumi
  Comment:
+   ← Revision 103 as of 2010-06-08 11:11:41 → ⇥
  Size: 5049
  Editor: DaisukeTatsumi
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 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 (PM) || ||Hz||
||MC1 length                         || 13.324109 || ||m||
||MC2 length                         || B) 13.324109 || ||m||
||MC1 Finesse                        || X-( TBD || || ||
||MC2 Finesse                        || X-( TBD || || ||
-Line 24:
+Line 22:
-||Arm cavity Finesse                 ||  || || ||
||Arm power gain                     ||  || || ||
||Arm power(single)                  ||  || ||MW||
||Arm cavity FSR                     ||  || ||MHz||
+||Arm cavity Finesse                 || 1550 || || ||
||Arm power gain                     || X-( 1.1 × 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||
-Line 29:
+Line 26:
-||PR gain                            ||  || || ||
+||PR gain                            || 11 || || ||
-Line 31:
+Line 28:
-||PRC cavity FSR                     ||  || ||MHz||
-Line 34:
+Line 30:
-||SR gain                            ||  || || ||
+||SR gain                            || 11 || || ||
-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 geometries''' ||
-Line 60:
+Line 56:
-||EM thickness      || 15 || ||cm||
||FM thickness      || 15 || ||cm||
||PRM thickness     || <:( TBD || ||cm||
||SRM thickness     || <:( TBD || ||cm||
||BS thickness      || <:( TBD || ||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 69:
+Line 65:
-||SRM Reflectivity  || 0.8464 = 0.92^2 || || ||
+||SRM Reflectivity  || 0.8464 = 0.92^2^ || || ||
-Line 77:
+Line 73:
-||Bulk loss (absorption) (large optics ??? for Sapphire: ???FM, EM) || :-? 20  || || ppm/cm ||
||Bulk loss (absorption) (small optics ??? for Fused Silica: ???)       || :-? 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 83:
+Line 79:
-||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 || || ||
-Line 86:
+Line 82:
+||DC readout phase                     || 134.7 || 121.8 || degree ||
-Line 93:
+Line 90:
-||Feed-Forward gain                    || -0.97 || || 1/(1-0.97) = 30 ||
+||Feed-Forward gain                    || -0.97 (openloop) || 1/(1-0.97) = 30 (closed loop) || ||
-Line 99:
+Line 96:
-Length Sensing Scheme Review by Somiya (Japanese) [[attachment:lcgtrse.pdf]]
-Line 101:
+Line 97:
-Length Sensing Scheme Review for advLIGO by Somiya [[attachment:AdvLIGO-LSCv4.pdf]]