Diff for "LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus"

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Confirmation of the current status

The first task of this working group is to establish a consensus between the members about the currently proposed ISC scheme. We will confirm what has been done so far in what degree of detail. Then decide what should be done next.

Parameters

(Classical-noise parameters are here)

Parameter	LCGT BRSE(2004)¹	LCGT BRSE(2007)²	LCGT BRSE(2009)	LCGT DRSE(2009)	units
Wave length	1064	1064	1064	1064	nm
Initial Laser Power	300	150	150	150	W
Injecting Laser Power into IFO	100	75(carrier)	75	75	W
Modulation depth	Not defined	Not defined
RF freq 1	15.025(AM)	9.98125(AM)			MHz
RF freq 2	49.5825(PM)	59.8875(PM)			MHz
MC1 length	9.755	9.755			m
MC2 length	199.78	180.463?			m
MC1 FSR	15.525	15.525			MHz
MC2 FSR	0.75125	0.831771?			MHz
MC1 Finesse	1720	1720			MHz
MC2 Finesse	1000	1000			MHz

EM Reflectivity	0.99995	0.99995	0.99995	0.99995
FM Reflectivity	0.995	0.996	0.992	0.992
PRM Reflectivity	0.76	0.80	0.77	0.77
SRM Reflectivity	0.68	0.77	0.88	0.88
BS Reflectivity	0.5?	0.5?	0.5	0.5
EM Transmittance	2e-5	2e-5	3e-5	3e-5
FM Transmittance	0.00497	0.00399	0.00798	0.00798
PRM Transmittance	0.23997	0.19999	0.22998	0.22998
SRM Transmittance	0.31997	0.22999	0.11998	0.11998
BS Transmittance	0.49997?	0.49999?
EM Loss	3e-5	1e-5(3e-5?)	2e-5	2e-5
FM Loss	3e-5	1e-5(3e-5?)	2e-5	2e-5
PRM Loss	3e-5	1e-5(3e-5?)	2e-5	2e-5
SRM Loss	3e-5	1e-5(3e-5?)	2e-5	2e-5
BS Loss	3e-5	1e-5(3e-5?)

Arm cavity length	3000	3000	3000	3000	m
PR cavity length	14.9899?	45?			m
PRM-BS length	Not defined	Not defined			m
BS-FM X length	Not defined	Not defined			m
BS-FM Y length	Not defined	Not defined			m
Asymmetry length	1.4990?	7.5?			m
SR cavity length	17.9878?	45?			m
SRM-BS length	Not determined	Not determined			m
SRC detuning phase	pi/2	pi/2	pi/2	1.343	rad

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 mass	50.9	30	30	30	kg
FM mass	50.9	30	30	30	kg
PRM mass	Not defined	Not defined			kg
SRM mass	Not defined	Not defined			kg
BS mass	Not defined	Not defined			kg

EM ROC	4500	4500	4500	4500	m
FM ROC	Infinity	Infinity	Infinity	Infinity	m
FM AR ROC	12	??	Infinity	Infinity	m
PRM ROC	0.81	??			m
SRM ROC	Not defined	Not defined			m
BS ROC	Infinity	Infinity			m

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	Not defined	Not defined	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

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

2004 data referred to LCGT design document 1.0. (1)
2007 data referred to LCGT design document 2.0 and TAC presentation at 2005/8/23 (2)

LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus (last edited 2010-06-03 14:34:47 by YoichiAso)

-  ⇤ ← Revision 1 as of 2009-05-04 17:32:28 → 
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  Editor: YoichiAso
  Comment:
+   ← Revision 61 as of 2009-09-04 09:36:03 → ⇥
  Size: 6452
  Editor: OsamuMiyakawa
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
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+----

== Parameters ==
(Classical-noise parameters are [[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ClassicalNoise|here]])
~-
||Parameter||LCGT BRSE(2004)<<FootNote(2004 data referred to [[http://gw.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=30&version=1|LCGT design document 1.0]].)>>||LCGT BRSE(2007)<<FootNote(2007 data referred to [[http://gw.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=30|LCGT design document 2.0]] and [[attachment:LCGT/subgroup/ifo/ISC/CoreDocuments/TAC.ppt|TAC presentation]] at 2005/8/23)>>||LCGT BRSE(2009)||LCGT DRSE(2009)||units||
||Wave length||1064||1064||1064||1064||nm||
||Initial Laser Power||300||150||150||150||W||
||Injecting Laser Power into IFO||100||75(carrier)||75||75||W||
||Modulation depth||Not defined||Not defined|| || || ||
||RF freq 1||15.025(AM)||9.98125(AM)|| || ||MHz||
||RF freq 2||49.5825(PM)||59.8875(PM)|| || ||MHz||
||MC1 length||9.755||9.755|| || ||m||
||MC2 length||199.78||180.463?|| || ||m||
||MC1 FSR||15.525||15.525|| || ||MHz||
||MC2 FSR||0.75125||0.831771?|| || ||MHz||
||MC1 Finesse||1720||1720|| || ||MHz||
||MC2 Finesse||1000||1000|| || ||MHz||
|| || || || || || ||
||EM Reflectivity||0.99995||0.99995|| 0.99995 || 0.99995 || ||
||FM Reflectivity||0.995||0.996|| 0.992 || 0.992 || ||
||PRM Reflectivity||0.76||0.80|| 0.77 || 0.77 || ||
||SRM Reflectivity||0.68||0.77|| 0.88 || 0.88 || ||
||BS Reflectivity||0.5?||0.5?|| 0.5 || 0.5 || ||
||EM Transmittance||2e-5||2e-5|| 3e-5 || 3e-5 || ||
||FM Transmittance||0.00497||0.00399|| 0.00798 || 0.00798 || ||
||PRM Transmittance||0.23997||0.19999|| 0.22998 || 0.22998 || ||
||SRM Transmittance||0.31997||0.22999|| 0.11998 || 0.11998 || ||
||BS Transmittance||0.49997?||0.49999?|| || || ||
||EM Loss||3e-5||1e-5(3e-5?)|| 2e-5 || 2e-5 || ||
||FM Loss||3e-5||1e-5(3e-5?)|| 2e-5 || 2e-5 || ||
||PRM Loss||3e-5||1e-5(3e-5?)|| 2e-5 || 2e-5 || ||
||SRM Loss||3e-5||1e-5(3e-5?)|| 2e-5 || 2e-5 || ||
||BS Loss ||3e-5||1e-5(3e-5?)|| || || ||
|| || || || || || ||
||Arm cavity length||3000||3000||3000||3000||m||
||PR cavity length||14.9899?||45?|| || ||m||
||PRM-BS length||Not defined||Not defined|| || ||m||
||BS-FM X length||Not defined||Not defined|| || ||m||
||BS-FM Y length||Not defined||Not defined|| || ||m||
||Asymmetry length||1.4990?||7.5?|| || ||m||
||SR cavity length||17.9878?||45?|| || ||m||
||SRM-BS length||Not determined||Not determined|| || ||m||
||SRC detuning phase||pi/2||pi/2||pi/2|| 1.343 ||rad||
|| || || || || || ||
||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 mass||50.9||30||30||30||kg||
||FM mass||50.9||30||30||30||kg||
||PRM mass||Not defined||Not defined|| || ||kg||
||SRM mass||Not defined||Not defined|| || ||kg||
||BS mass||Not defined||Not defined|| || ||kg||
|| || || || || || ||
||EM ROC||4500||4500||4500||4500||m||
||FM ROC||Infinity||Infinity||Infinity||Infinity||m||
||FM AR ROC||12||??||Infinity||Infinity||m||
||PRM ROC||0.81||??|| || ||m||
||SRM ROC||Not defined||Not defined|| || ||m||
||BS ROC||Infinity||Infinity|| || ||m||
|| || || || || || ||
||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||Not defined||Not defined|| 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||


[[LCGT/subgroup/ifo/ISC/TaskList/CurrentStatus/ToDo|To do list]] to define parameters for 2009
------
== Reference ==
Length Sensing Scheme Review by Somiya (Japanese) [[attachment:lcgtrse.pdf]]

Length Sensing Scheme Review for advLIGO by Somiya [[attachment:AdvLIGO-LSCv4.pdf]] 

----