Caroline A. Cantley for Advanced LIGO Suspension Team / University of Glasgow /GEO600 Group
GEO600 during S5
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Transcript of GEO600 during S5
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