Status of GEO600

Benno Willke

for the GEO600 team

Aspen Meeting

Aspen CO, January 2005

LIGO-G050030-00-Z

Aspen05, B. Willke

Sensitivity Improvements

102

103

10-21

10-20

10-19

10-18

10-17

Str

ain

AS

D [

Hz-1

/2]

Frequency [Hz]

31 Dec '03 (S3 II)

Aug '02 (S1)

Jan '02 (E7)

5 nov '03 (S3 I)

5 Jan '04 (combined)

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Transition Commissioning - Observing

overnight runs Aug04 – Jan05: 1405h (duty cycle: 93.7%)

0 10 20 30 40 50 60 70 80 900

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

0.5 time origin 2004-10-20 16:00:27 (782323240)

Time (Days)

Ins

pir

al R

an

ge

(M

Pc

)

NS-NSBH-NSBH-BH

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Central Building

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Tube / Trench

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Clean Room / Control Room

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Reaction Pendulum

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GEO600 optical layout

12W lasermode cleaner

interferometer with dual recycling

detector

Attenuated to 6WAttenuated to 6W

1% Transmission1% Transmission

600m

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Sensitivity progress (highlights)

Typical S3

HPD lock +

New MI+SR servo

SR bench scattering

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Sensitivity – Jan 2005

100 100050 6000

10-21

10-20

10-19

10-18

h(f

)

[1/

sqrt

(Hz)

]

Frequency [Hz]

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Sensitivity Change with Heater Power

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Amplitude Noise Coupling

101

102

103

10-2

100

Mag

nitu

de (

V/V

)

Frequency (Hz)

101

102

103

-200

-100

0

100

200

Pha

se (

deg)

Frequency (Hz)

TF: MICVIS > P

TF: MICVIS > Q

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Unbalanced Sidebands

PRC

SRCbroad-band

SRCdetuned to1.1 kHz

MI-sidebandsSR-sidebands broadband

SR-sidebands1.1kHz detunedcarrier

-119 * fPRC

-72 * fPRC

72 * fPRC

119 * fPRC

0

72 D (765Hz) D (1.26kHz) D (1.26kHz) 72 D (765Hz)

2.2kHz 1.1kHz1.86kHz 2.3kHz

SR-sidebands2kHz detuned

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Optical Gain

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Calibration

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On-line optical TF measurements

actuator optical

CAL P and Q

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Calibration progress

• On-line calibration of both output quadraturesHP and HQ

• Work on optimal combination is underway

• Estimation of optical parameters in real-time in control room

• On-line calibration leads to overnight runs

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Combining HP and HQ - result

• HQ’ contains almost no signal compared to HP’

• Where noise behaves like cal lines, we have apparent displacement

• Useful diagnostic for noise hunting (?)

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Overnight Runs – Jan 14th

0 1 2 3 4 5 6 7

10-20

10-19

RM

S S

tra

in

Time from 789686520 (2005-01-13 21:21:47) to 789715310 (2005-01-14 05:21:37)Step size of 10 secs

0 1 2 3 4 5 6 7

10-21

Time (H)

RM

S S

tra

in

HP: 220.0-230.0 Hz

HQ: 220.0-230.0 Hz

HP: 989.0-999.0 Hz

HQ: 989.0-999.0 Hz

1 2 3 4 5 6 70

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

Hours starting from UTC 2005-01-13 21:21:51

Eff

ec

tiv

e D

ista

nc

e (

MP

c)

InspiralSenseMon for HP

BH-BHBH-NS

NS-NS

0 1 2 3 4 5 6 72.5

3x 10

5

Gp

P params: 28800 secs from 2005-01-13 21:21:47 (789686520) every 10 secs

0 1 2 3 4 5 6 7950

100010501100

P P

ole

f

0 1 2 3 4 5 6 7

2.4

2.6

2.8

P P

ole

Q

0 1 2 3 4 5 6 7

1500

1600

1700

P Z

ero

f

Time (hours)

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Noise Projections

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Summary & Outlock

• GEO600 runs with dual-recycling on large baseline detector including calibration

• sensitivity improved by two orders of magnitude since S3-I

• data taking over night and on weekends with high duty cycle

• next steps:– LSC–S4 science run – increase injected power – increase power recycling gain– improve noise models and increase sensitivity– convert GEO into observatory

• GEO-HF

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