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

  1. 2004 data referred to LCGT design document 1.0. (1)

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

LCGT/subgroup/ifo/ISC/IFOParameters/BeforeBW (last edited 2011-06-17 00:45:34 by OsamuMiyakawa)