Harald Lück for the Ruthe Team

GEO600 during S5

9th ILIAS WG1 meeting, Potsdam, 2006

GEO600 Optical Layout

4 kW

0.09

10 W

5 W

5 kW

7 kW

5 W

2.2 W

2.5

kW

2 kW

GEO in S5 ON &WE mode

• Started participating in S5 on Jan. 20th

• Comissioning during daytime

• Data taking during nights, weekends and holidays.

• Moderate efforts to keep detector locked during data taking times, i.e. no operator shifts.

GEO in S5 24/7 mode

• Commissioning stopped on May 1st 2006• Full time data taking with operators on site in 2

shifts during working days• SMS – alarm system calls operator on duty if

predefined problem occurs– Lock-loss > 30min., h_rms > reference, data

acquisition faults, ...• Operator calls 'expert' if he cannot solve a problem

by predefined procedure• Maintenance times for measuring loop gains,

transfer functions, noise projections etc.

SMS Alarm System

GEO600 S5 Science Duty Cycle

0 10 20 30 40 50 60 70 80 90 1000

10

20

30

40

50

60

70

80

90

100Total science time: 46.5 days, Overall Duty Cycle: 46.5 %

Scie

nce

duty

cyc

le (

%)

0 10 20 30 40 50 60 70 80 90 1000

10

20

30

40

50

Acc

umul

ated

scie

nce

tim

e [d

ays]

Time from 2006-01-20 23:59:47 (821836800) [days]

ON&WE Mode (Jan. 20th – April 30th) 24/7 Mode (May 1st - …)

S5: Duty Cycle

• 1. May-17. July, 78 days– Instrumental duty cycle: 95.4%– Science time duty cycle: 90.3%

• Longest lock: 102 hours

Time [days]

Inst

. dut

y cy

cle

[%]

S5: unlocked times

• Typical relock-time ~ 5 minutes

• Longest unlocked time: 19 hours

Unlocked time [minutes]

Num

ber

of u

nloc

ked

tim

es

Histogram of unlocked times < 1 hour

Tuning (from 350 Hz) to 550 Hz

• On April 3rd we changed the tuning from 350 Hz to 550 Hz to improve SNR @ fs above 400 Hz.

• Optimized all parameters and combining filters for 550 Hz.

• This did not compromise much sensitivity @ low fs as we had a lot of excess noise there anyway.

Sensitivity in Science Runs

102

103

10-23

10-22

10-21

10-20

10-19

10-18

10-17

10-16

Typical Sensitivity: Science Runs

Freq. [Hz]

AS

D [ h

/H

z]

S1 Aug 26 `02S3I Nov 5 `03S3II Dec 31 `03S4 Feb 22 `05S5 N&W Mar 23 `06S5 24/7 July '06

Sensitivity in Science Runs

102

103

10-23

10-22

10-21

10-20

10-19

10-18

10-17

10-16

Typical Sensitivity: Science Runs

Freq. [Hz]

AS

D [ h

/H

z]

S1 Aug 26 `02S3I Nov 5 `03S3II Dec 31 `03S4 Feb 22 `05S5 N&W Mar 23 `06LHO4k Mar ' 06LLO 4k Jan '06LHO 2k Jan '06GEO Design 550HzS5 24/7 July '06

Sensitivity in Science Runs

102

103

10-23

10-22

10-21

10-20

10-19

10-18

10-17

10-16

Typical Sensitivity: Science Runs

Freq. [Hz]

AS

D [ h

/H

z]

S1 Aug 26 `02S3I Nov 5 `03S3II Dec 31 `03S4 Feb 22 `05S5 N&W Mar 23 `06LHO4k Mar ' 06LLO 4k Jan '06LHO 2k Jan '06GEO Design 550HzS5 24/7 July '06

x4

GW-IFO network (USA & Europe)

4x

Cal. Lines removal from h(t)

102

103

10-21

10-20

10-19

10-18

10-17

nfft/fs = 2.00 : navs = 50 : enbw = 0.75 : nsecs = 100

Am

plit

ud

e (

Vrm

s /

Hz1

/2)

Frequency (Hz)

G1:DER_DATA_Hfs = 16384 : 2006-03-22 22:05:06 -

Locking procedure with add. 2f signal

• PR error signal always available due to asymmetry in BS (~48/52)

• MI lock to dark fringe• SR lock with three different signals in detuned

state (~2kHz)

• Tuning to desired frequency (changing parameters in the process)

• Switching MI lock to Single element diode• Switching Servo parameters to lower noise &

lower tolerance ones• Ramping up power to ‚final‘ value• In Total: ~ 3min

Locking on 2f-SR sequence

At second 4.2 SR control is switched from SR-2f to MI-2f. (only visible by more noise in SR feedback)at second 5.5 the SR freq. is set back to tuning start frequency.

For this purpose the SR mod. freq. is set automatically to the value chosen in the front panel,which is 9.018070MHz right now. Also the SR-2f signal is routed in hardware by cmos switch to the SR module.

Then 2 sec. after acquisition the 2f-lock is switched to MI-2f signal and then the SR freq. is changed to nominal for tuning start.Then tuning starts as usual…and tunes down to any f > 200 Hz. Straight from the labbook

Sensitivity; tuned vs. 550Hz detuned

Sensitivity; tuned vs. 550Hz detuned (normalized to 550Hz)

BS Violin Modes

BS Violin Modes

660 670 680 690 700 710 720

10-23

10-22

10-21

10-20

10-19

10-18

10-17

nfft/fs = 100.00 : navs = 1 : enbw = 0.02 : nsecs = 100

Am

pli

tud

e (V

rms)

Frequency (Hz)

G1:DER_DATA_Hfs = 16384 : 2006-06-22 16:58:20 -

data2

G1:DER_DATA_Hfs = 16384 : 2006-06-20 16:58:20 -

data4

BS Violin Modes

0 1 2 3 4 5 6

x 105

10-22

10-21

10-20

10-19

10-18

10-17

10-16

time [s]

Vio

lin

mod

e am

pli

tud

e in

h [

rms]

688.7100

689.0500

710.2000711.0300

713.7500

685.9300

Qs f

0.66x108 688.71

0.58x108 689.05

0.65x108 710.20

0.58x108 711.03

0.69x108 713.75

0.88x108 685.93

0 1 2 3 4 5 6 7 8

x 104

10-21

10-20

10-19

10-18

10-17

10-16

time [s]

Vio

lin

mod

e am

pli

tud

e in

h [

rms]

688.7100

689.0500

710.2000711.0300

713.7500

685.9300

Glitches (MIC-VIS, Sine gaussians, Magnetic, Power ups, Seismic etc.)

(see Josh‘s glitch talk)

100

101

102

103

104

10-24

10-22

10-20

10-18

10-16

10-14

10-12

10-10

10-8

Frequency (Hz)

Am

pli

tud

e (V

rms

/ H

z1/2 )

nfft/fs = 1.00 : navs = 1 : enbw = 1.50 : nsecs = 1

G1:DER_DATA_Hfs = 16384 : 2006-04-25 14:04:56

Seismic improvements(here: backing pumps)

AC outdoor unit

The Owl

Chasing the owl; different alignments

Chasing the owl; different alignments

Chasing the owl; different alignments yet

Chasing the owl… away

• Spotted and repaired bad contact in SR-2f module

• Since then the owl is gone !???... So far

• Strange, as the owl was there before the module....

0.782 Hz spaced line forests

h(t). 0.7e-13/f^2 * TCIb_Mag_X fits pretty well for a 80Hz < f < 620 Hz

Factor 2 off @ 600Hz

Mag. Lines @ 600 Hz

Magnetic features in Central

Magnetic features in Central cntd.

Magnetic features in East house

Magnetic lines sometimes gone !?

(magnetic) 0.782 Hz lines self made with UPSs?

Hourly glitches on mains: ‚Rundsteuersignal‘

Magnetic coupling from mains to h(t) might have to do with too many N – PE connections

Some detective work

S5: a piece of detective work

S5: a piece of detective workSeismic correlations between the 3 corner stationsfor one of the events

Time [s]

Cor

rela

tion

[%

]

C/EN/C

N/E

S5: a piece of detective work

S5: a piece of detective work

Preparing gravel mining

KBU Kies & Baustoffunion

Ripples in h(t)

Ripples in h(t)

come from seismic in the north

Problems (solved & remaining)

• Glitches (Josh)– Dust– Saturations– Magnetic– Sine Gaussians– Power up– Others

• Other problems– Mains: hourly glitches, lines forests, ground currents– PPD– Periodic disturbances probably from end buildings –> coated lenses in

next maintenace period– Seismic: isolated many machines(pumps, ACs, fans etc, even some

computers in CB)– Vetoes: worked a lot on vetoing glitch events. Can veto about 30%(?)

of glitches

Future:

• Continue S5

• Decide on maintenance period in autumn

• find power losses

• increase to full injected power

Subtracting MID AA Feedback noise from H in the time domain (Josh)

Conclusions:- Works well ! - Time-domain subtraction of MID AA FBs using _very_ simple filters already improves H factor 2-3 from 10-70Hz.- H with MID AA FBs subtracted is not too far from SR FB 10-80Hz.- Improving this in hardware would be better because software subtraction won't reduce upconversion.

Phase noise couplingNot confirmed by coherence