TAMA300
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FCGDH

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TAMA CollaborationKA

B
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DE

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H
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A.BertoliniF R.DeSalvoG
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B

J

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TAMA CollaborationKTAMA300検出器
l 300m基線レーザー干渉計型重力波検出器TAMA300
サイト: 国立天文台 三鷹キャンパス (東京都)l TAMA300の目的
1. 近傍銀河で発生する重力波イベントを検出可能な実証型検出器の開発

West End Room

Center Room

2. 将来のkm級干渉計に必要な技術の確立
理論感度限界 ~ hRMS = 3 x 10-21
観測帯域の中心周波数300Hz(バンド幅300Hz)
South End Room

Noise hunting(DC~200Hz)(DC~20Hz)(20Hz~200Hz)(~(200Hz~2kHz))(2kHz~50kHz)(50kHz~)Noise budget
Displacement noise level of TAMA300-610-7dL- displacement
Laser frequency noise
Laser intensity noise
Detection+Shot noise
Shot noise
Detection noise
mirror thermal noise Q=3e6suspension thermal noise Q=5e5dl- feedback noisedl+ feedback noisedL- filter noise
Alignment noise
Seismic noiseElectronics noise (matrix)
Oscillator Amplitude Noise
Oscillator Phase Noise

10-8

1/2

Displacement noise [m/Hz ]10-9

1010-1010-1110-1210-1310-14

10-15

10-1610-1710-1810-1910-20

100101102

103

Frequency [Hz]104105Noise hunting(DC~200Hz)(DC~20Hz)(20Hz~200Hz)(~(200Hz~2kHz))(2kHz~50kHz)(50kHz~)Influence of earthquakes
2005/7/23
M6.0
2005/8/16
M6.8

Influence of earthquakes
magnet broken
wire broken

3
1

7/23
8/27 RFPMI
8/31 SAS
magnetbroken
magnetbroken

Electronics noisedL-errorsignalPD
Demodulator-15

Displacement noise [m/sqrtHz]

10-16

10ServoFilter

Long Cable(~20m)

feedback
signalLong Cable(~20m)

Matrix Coil Driver

Displacement noise level of TAMA300 (2005/6/3)
2005/06/03
Matrix noiseElectronic noise coupling
after the servo filter=>-1710-1810-19

101001000

Frequency [Hz]

Pre-emphasis / De-emphasis
pre-emphasis filter / de-emphasis filter

pre-emphasisc.f.

LIGO/VIRGO ~ ADC/DAC
GEO ~de-emphasis

Previous Configulationemphasisemphasis

/dLPD

1/6
-15

Displacement noise [m/sqrtHz]

10

Displacement noise level of TAMA300 (2005/6/3)
2005/06/03-16

Without attenuator

10-17

10

Coil driver

-18

10-19

10100

1000

Frequency [Hz]

Configulation
ServoFilter

dLPD

1AlignmentQPD

1emphasis
1 1~

11/33

11/33

11/33

ServoFilter

longcable

dL-Matrix

33

pre-emphasis
zero 30Hz
pole 1kHz

de-emphasis
pole 30Hz
zero 1kHz33

pre-emphasis
zero 30Hz
pole 1kHz

Coil driveremphasisemphasis
matrix coil driveremphasis

De-emphasis filter
i0i

V

Rvi50

(
Rb=0.25 , Cb=640 F
pole 30Hz, zero 1kHz8)

Rb 0.25
Cb 640V

Rin
10k

F

Coil8

Current
driverRvi50

Ra 1.9k
Rb 60
Cb 2.7uF

Currentdriver

Rin 100k

Coil8

Pre-emphasis filter
zero 30Hz, pole 1kHz
(input equivalent noise ~Rb
60

1.9k

Cb
2.7uF

Ra
1.9k

OP2750nV/sqrtHz)Experiments with TAMA300
pre-emphasis/de-emphasis
emphasisemphasis ON
pre-emphasis de-emphasis
TTLRFPMIONUnlock300m FParm mass)ONExperiments with TAMA300
pre-emphasis
10Voltage noise [V/Hz1/2]

1010

1010

10

10-1-2-3-4-5

NS Arm error signal @Dark
NormalEmphasized-6-7

10-1

100

10

1102

Frequency [Hz]103104105

Experiments with TAMA300
emphasis1010

1/2

Displacement noise [m/Hz ]10101010101010101010101010-5-6-7-8NS Arm displacement
NormalWith emphasisdL- displacement
2003/11/04 (x1/2)-9-10-11-12-13-14-15-16-17-18-1910-1

100

101

102

Frequency [Hz]

103

104

105

Conclusion
TAMA300
SAS

pre-emphasis, de-emphasis
emphasis

L- emphasis
Zero 30Hz, Pole 1kHzemphasis
RFPMI

emphasis