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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Aspen05, B. Willke
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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Aspen05, B. Willke
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
Aspen05, B. Willke
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 (?)
Aspen05, B. Willke
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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