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

Differences between revisions 86 and 119 (spanning 33 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 86 as of 2010-06-08 09:36:37 → 
  Size: 4812
  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 15:
-||RF freq 1                          || 11.25 (PM) || ||MHz||
||RF freq 2                          || 45.00 (PM) || ||MHz||
||MC1 length                         || 13.324109 || ||m||
+||RF freq 1                          || 11.25M (PM) || ||Hz||
||RF freq 2                          || 45.00M (AM) || ||Hz||
||MC1 length                         || B) 10.0 || ||m||
 Line 22:
-||Arm cavity Finesse                 ||  || || ||
||Arm power gain                     ||  || || ||
||Arm power(single)                  ||  || ||MW||
+||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||
 Line 26:
-||PR gain                            ||  || || ||
||PRC power on BS                    ||  || ||W||
+||PR gain                            || 11 B) 10.4 || || ||
||PRC power on BS                    || B) 780 = 75 * 10.4 || ||W||
 Line 30:
-||SR gain                            ||  || || ||
+||SR gain                            || 11 (not checked yet)|| || ||
 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 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 65:
-||SRM Reflectivity  || 0.8464 = 0.92^2 || || ||
+||SRM Reflectivity  || 0.8464 = 0.92^2^ || || ||
 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 82:
+||DC readout phase                     || 134.7 || 121.8 || degree ||
-Line 89:
+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) || || ||