Differences between revisions 48 and 132 (spanning 84 versions)
⇤ ← Revision 48 as of 2010-06-08 05:37:24 →
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Editor: DaisukeTatsumi
Comment:
← Revision 132 as of 2011-04-30 00:35:52 → ⇥
Size: 5155
Editor: OsamuMiyakawa
Comment:
Deletions are marked like this. Additions are marked like this.
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||<align="center">'''Parameter'''||'''LCGT VRSE-D'''<<FootNote([[http://gw.icrr.u-tokyo.ac.jp/cgi-bin/DocDB/ShowDocument?docid=30&version=1|Special Working Group Report]].)>>||'''LCGT VRSE-B''' ||units|| ||<align="center":width="20%">'''Parameter'''||<align="center":width="15%">'''LCGT VRSE-D'''<<FootNote([[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||		 ||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||
||<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.)>> || 374k = 75 * 10.4 * 960 /2|| ||W||
||PRC power on BS || 780 = 75 * 10.4 || ||W||
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||Arm cavity length || 3006.69 || ||m|| ||Arm cavity length || 3000 || ||m||
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||PRM-BS length || 48.2826 || ||m||
||BS-FM X length || 26.665515 || ||m||
||BS-FM Y length || 23.334485 || ||m||
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||SR cavity length ||           || ||m||
||SRM-BS length || || ||m||
||SRC detuning phase|| 0.05934 = 3.4 degree || 0 ||rad||		 ||BS-FM length || 25 || ||m||
||SR cavity length || 73.2826 || ||m||
||SRC detuning phase|| 86.5 || 90.0 ||degree||
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||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 ||
|| || || || ||
||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 || || || ||
|| || || || ||
||<bgcolor="#FFFF00":colspan="4"> '''Mirror geometries''' ||
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||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||
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||EM ROC || 7113.900    || ||m||
||FM ROC || 7113.900    || ||m||
||FM AR ROC || X-(　Not defined || ||m||
||PRM ROC || X-( Not defined || ||m||
||SRM ROC || X-( Not defined || ||m||		 ||EM ROC || 1900 || ||m||
||FM ROC || 1900 || ||m||
||FM AR ROC || Flat || ||m||
||PRM ROC || <:( TBD || ||m||
||SRM ROC || <:( TBD || ||m||
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||<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 || || ||
||EM Loss || 45e-6 || || ||
||FM Loss || 45e-6 || || ||
||PRM Loss || 45e-6 || || ||
||SRM Loss || 45e-6 || || ||
||BS Loss || 100e-6 || || ||
|| Transmittance || 1 - R - Loss || || ||
|| || || || || || ||
||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 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 || 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||		 || || || || ||
||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||
|| || || || ||
||<bgcolor="#FFFF00":colspan="4"> '''Mode Cleaner''' ||
||MC1 length || B) 10.0 || ||m||
||MC2 length || B) 13.324109 || ||m||
||MC1 Finesse || X-( TBD || || ||
||MC2 Finesse || X-( TBD || || ||
|| || || || ||
||<bgcolor="#FFFF00":colspan="4"> '''Output Mode Cleaner''' ||
||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 ||
||<bgcolor="#FFFF00":colspan="4"> '''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) || || ||
|| || || || ||
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Length Sensing Scheme Review by Somiya (Japanese) [[attachment:lcgtrse.pdf]]
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Length Sensing Scheme Review for advLIGO by Somiya [[attachment:AdvLIGO-LSCv4.pdf]]

..Up

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

Primary parameters of interferometer

Arm cavity Finesse

1546

Arm cavity power gain

960

PR gain

10.4

Arm power (single arm)2

374k = 75 * 10.4 * 960 /2

W

PRC power on BS

780 = 75 * 10.4

W

Cavity Length

Arm cavity length

3000

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

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

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

Mirror geometries

EM mass

30

kg

FM mass

30

kg

PRM mass

<:( TBD

kg

SRM mass

<:( TBD

kg

BS mass

<:( TBD

kg

EM ROC

1900

m

FM ROC

1900

m

FM AR ROC

Flat

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

Mode Cleaner

MC1 length

B) 10.0

m

MC2 length

B) 13.324109

m

MC1 Finesse

X-( TBD

MC2 Finesse

X-( TBD

Output Mode Cleaner

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

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

  1. Band-Width Special Working Group. (1)

  2. 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)