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Detector Operation (Operations Report)
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Nenci - 22:54, Friday 24 November 2017 (40150)Get code to link to this report
Operator Report - Evening Shift 24/11

15:08 UTC - ITF stable locked for all the shift with Hrec ~ 22Mpc.

During the afternoon has been performed a magnetic noise injection from remote (by Cirone)

22:40 - Commissioning Mode stopped.

All the subsystems worked properly, nothing of relevance to report.

 

Detector Operation (Operations Report)
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menzione - 15:56, Friday 24 November 2017 (40149)Get code to link to this report
Operator Report - morning shift 24/11

Upon arrival I found ITF  locked in SSFS_State since yesterdey evening.
From 7:30 to 9:30 UTC ITF Majorana worked at NE on optic lever with ITF not locked.
Then, at 10:00 UTC, ITF has been relocked in Low_Noise_3 with horizon ~21 Mpc.
The lock needed a fine realignment of NE and NI and a change of DARM gain carried out by J. Casanueva.

The planned activity on towers shaking, carried out by I. Fiori, went on without major problems. Activty started at 10:30 UTC and concluded at 15:00 UTC.

ACS
According with I. Fiori, at 14:22 UTC, I set PN on ACS Air Flux in Detection Lab in order to allow the activity in Det Lab by Fiori and Boschi. PR restored at 14:56 UTC.

Detector Characterisation (Broadband noise)
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mwas - 13:56, Friday 24 November 2017 (40147)Get code to link to this report
Flat noise in the bucket is increasing
The noise increased in the bucket (~150Hz) after the SDB1/SPRB intervention (or in the the two days preceeding it when the 1/f^4 noise started, hard to say). 39979.

This trend has continued more recently with the power increase.
Figure 1 shows the spectrum:
* blue - back in September when the range was ~30Mpc
* red - after the SDB1/SPRB intervention and the 1/f^4 noise (mirror actuator saturation) fixed
* green - with input power increased from 14W to 20W, not much change compared to red
* black - with input power of 26W, flat noise much higher
* magenta - same data as blue (Sep 27) + a flat noise at 1.9e-23m, matches very well the black curve

So the mystery noise is still very consistent with flat noise and might be increasing with input power.
Images attached to this report
40147_20171124135140_screenshotfrom20171124135219.png
Detector Operation (Procedures Updates)
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casanueva - 09:31, Friday 24 November 2017 (40146)Get code to link to this report
Comment to Operator Report - afternoon shift 23/11 (Click here to view original report: 40144)

It is not surprising that PR-WI did not work, since the gains have not been adjusted after the increase of the input power.

AdV-TCS (CO2 laser projector)
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Aiello, Fafone, Nardecchia, Rocchi - 00:01, Friday 24 November 2017 (40145)Get code to link to this report
Comment to DAS settings investigation (Click here to view original report: 40129)

The different tests done yesterday are summarized in the following table (see figure 1).

Test Start (UTC) End (UTC) Power IN (mW) Power OUT (mW)
1 18:51 20:32 150* 300*
2 20:41 22:06 100 WI - 175 NI 200 WI - 350 NI
3 22:13 22:34 200* 400*
4 22:53 -- 100 WI -175 NI 200 WI - 350 NI

* same power applied on West and North CP.

As shown in figure 2 the maximum gain has been reached during the test #2, with differential heating applied to West and North CP.
At first glance, this seems to favour the hypotesis of the presence of a dominant diverging lens in the West CP (in agreement with the behavior of the contrast defect during CH tests, but in disagreement with the behavior of the recycling gain). Till now no clear conclusion, to be better investigated.

In this configuration, the time behavior of the recycling gain does not show the overshoot due to annular heating.

In order to evaluate the DAS power upper limit to maximize the 56 MHz gain, in test #3 the power has been increased up to 200 mW and 400 mW. An overcompensantion has been observed. Thus we decided to leave the ITF with the settings of configuration #2.

Further analyses of the ITF signals are ongoing.
Images attached to this comment
40145_20171123235717_gain1.png 40145_20171123235725_gain2.png
Detector Operation (Procedures Updates)
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Gherardini - 23:19, Thursday 23 November 2017 (40144)Get code to link to this report
Operator Report - afternoon shift 23/11
The firs part of this shift was dedicated to work on detection: Matteo and Romain from remote worked with the itf not locked up to 17:15utc; then we tried to relock the itf but we had some problem: the itf unlocked every time once reaching the dark fringe, I contacted Maddalena (ISC on-call) that suggest to change the DARM gain so I tried to increase it and finally at 19:15utc we succeeded to relock in LOW_NOISE_3 state and I started the standard calibration measurements:

- 19:16utc - 19:37utc, marionette calibration (CALIBRATED_DF_MIRtoMAR)
- 19:38utc - 19:48utc sensitivity and validation of h(t) reconstruction (CALIBRATED_DF_SENSITIVITY)
- 19:51utc - 20:00utc Photon calibration injections (CALIBRATED_DF_PCAL)
- 20:02utc - 20:29utc free swinging Michelson (CALIBRATED_FREEMICH_WINI)
- 20:30utc - 20:32utc Time delay measurements: between CAL and Sc noise channels (CALIBRATED_DELAY)
- 20:33utc - PR-WI cavity (CALIBRATED_PRWI) --> failed because of not possible to lock the PR-WI cavity
- 20:35utc - 22:54utc Measurements for NE,WE mirrors calibration (CALIBRATED_DF_INtoEND_LN2)

at the and I tried relock but I had difficulties even in locking the single cavities so I left the itf in LOCKED_SSFS state.

-daq
susp_Fb stopped/restarted at 18h03utc because of missing suspension data at FbmFE level.

-det
after the failing of the PR-WI calibration the beam was completely out of the detection photodides (beam completely out on B1p camera), I tried to open and reclose the bench local control but without any changes, to recover the situation I changed the SDB1 TX set point from -415 to -235 (see plot)


Images attached to this report
40144_20171123231938_1123sdb1.gif
Comments related to this report
casanueva - 09:31, Friday 24 November 2017 (40146)

It is not surprising that PR-WI did not work, since the gains have not been adjusted after the increase of the input power.

Detector Characterisation (Broadband noise)
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genin - 21:13, Thursday 23 November 2017 (40142)Get code to link to this report
Comment to Shot noise changes with higher laser power (Click here to view original report: 40134)

It is likely that the discrepancy of the power "stored" in the arm cavities or transmitted through the end mirror and the increase of input power is related to a different mode matching originating from a different thermal lens in the SIB1 Faraday isolator and PR or cavity mirrors. When we will recommission the ITF we will have to readjust the mode matching.

AdV-COM (AdV commissioning (1st part) )
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fiori, paoletti, boschi - 17:15, Thursday 23 November 2017 (40137)Get code to link to this report
shaker injections DT tower W flange

today we repeated the shaker sweep injection performed before O2. here the parameters used

/users/fiori/home/AdV/Commissioning/Injections/scripts>ENV_swept_sine_cured.py
DAC channel (i.e. NOISE_CEB_DAQroom, EEroom, DetEER, NOISE_WEB,NEB): NOISE_CEB_DetEEroom
Log file name (to be read by Matlab code): log_DT_W_flange_23112017.txt
Start frequency (Hz): 60
Stop frequency (Hz): 800
Number of points (integer): 150
Number of averages (integer): 4
Number of cycles (integer): 10
Minimum average time (float, seconds): 8
Please enter measurement amplitude envelope in freq/amp pairs (a single amplitude is accepted)
For example (3 envelope points): 1 5e-1 10 5e-2 100 2e-2
Measurement amplitude envelope in freq/amp pairs: 1

Hrec looks most affected around 450Hz.

The log file with all gps and frequencies is attached.

Images attached to this report
40137_20171123171501_spectro23nov2017.gif
Non-image files attached to this report
AdV-ISC (Commissioning up to first full interferometer lock)
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fiori - 16:58, Thursday 23 November 2017 (40136)Get code to link to this report
Comment to SSFS gain reduction test (Click here to view original report: 40120)

The increase of noise at several peaks is clearly visible during the test of this morning, when the SSFS gain was reduced from 400 to 100: See Figure 1.

Seems that all the Hrec structures that are coherent with SSFS error signal are affected: Figure 2,3,4,5

Images attached to this comment
40136_20171123165701_gainreductiontest.gif 40136_20171123165708_gainreductiontestfft4.gif 40136_20171123165711_gainreductiontestfft3.gif 40136_20171123165718_gainreductiontestfft2.gif 40136_20171123165721_gainreductiontestfft1.gif
Detector Characterisation (Broadband noise)
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mwas - 15:53, Thursday 23 November 2017 (40134)Get code to link to this report
Shot noise changes with higher laser power
Figure 1, with the increase of laser power over the last week the high frequency noise has not improved much, about 15%.
Figure 2, the input power has increased from 14W to 26.5W so an increase of a factor 1.9, which should improve shot noise by sqrt(1.9)=1.37.
However the power in the arms has increased less than that, for B7 from 325mW to 510mW, so an increase of 1.57 that should correspond to only 1.25 improvement in shot noise

On top of that the PD are less shot noise + electronic noise dominated.
Figure 3 shows the situation before power increase, where the PD subtraction is 7% below the PD sum
Figure 4 shows the situation after the power increase, where the gap increases to 15%.

A large part of that is due to a decrease in CMRF.
Figure 5 shows that the coherence with LSC_PRCL is 15% (out of loop sensor of frequency noise)
Figure 6 shows that the noise projection of SSFS quantum noise is less than a factor 3 below shot noise.

So in total the 15% improvement in shot noise is roughly consistent with only 25% improvement in shot noise and a larger coupling of frequency sensing noise.
Images attached to this report
40134_20171123154138_screenshotfrom20171123141353.png 40134_20171123154158_screenshotfrom20171123152948.png 40134_20171123154558_screenshotfrom20171123140616.png 40134_20171123154606_screenshotfrom20171123140525.png 40134_20171123154900_screenshotfrom20171123133356.png 40134_20171123154922_figurequantum.png
Comments related to this report
genin - 21:13, Thursday 23 November 2017 (40142)

It is likely that the discrepancy of the power "stored" in the arm cavities or transmitted through the end mirror and the increase of input power is related to a different mode matching originating from a different thermal lens in the SIB1 Faraday isolator and PR or cavity mirrors. When we will recommission the ITF we will have to readjust the mode matching.

Suspension Electronics (Suspension Electronic)
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Paoletti, Fiori - 15:52, Thursday 23 November 2017 (40135)Get code to link to this report
Looking for better cable positioning (50Hz)

We observed (Photo 1) that WI suspension's cables were laying very near to Mains power cables. Today we have rearranged them trying to reduce the 50Hz coupling (Photo 2).

No real effect in DARM (the coupling could be shared also with NI tower; not WE nor NE, as we checked in 39431 and in 39487)

Images attached to this report
40135_20171123155206_20171024114952.jpg 40135_20171123155220_20171123110733.jpg
Detector Operation (Operations Report)
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menzione - 15:52, Thursday 23 November 2017 (40133)Get code to link to this report
Operator Report - morning shift 23/11

Upon arrival I found ITF  locked in SSFS_State.
At 7:01 UTC ITF unlocked for unknown reasons. After several attempts I relocked in Low_Noise_3 with Horizon 21 Mpc.

The planned activity on ENV carried out by I. Fiori and F. Paoletti started at 8:30 UTC and concluded at 14:50.
At 14:52 UTC started the activity on DET carried out by Gouaty and Bonnard with only NI aligned.

Susp
At 9:00 UTC the MC Guardian alert a shake of the suspension. Boschi on site fixed the problem.
At 9:40 UTC Inj system failure with suspension shaking. Inj and Susp OnCall intervention was needed.

VPM
During the ENV activity Paoletti unplagged and replagged cables for WI CoilRelay. CoilsSbWI stopped. Restarted properly.

AdV-INJ (Input Power Control (IPC) system)
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casanueva, mantovani - 14:32, Thursday 23 November 2017 (40132)Get code to link to this report
Comment to Additional optical density on IMC_TRA (Click here to view original report: 40110)

The trigger of this search was the pathological behaviour of the fmoderr loop. During the night of the 20 to the 21 we have observed that the offset after the initial fmoderr tuning was increasing, increasing significantly as well, the offset of the error signal that is used for this purpose in Dark Fringe. Knowing that this final loop has a very low control bandwidth, arriving in DF with a big offset means that we can not recover nominal conditions.

Figure 1 shows the initial offset after the Fmoderr tuning was done at the beginning of each lock trial during the night of 20 to 21 (max and min values). It can be seen that there is a trend behaviour towards higher values during the night. There are also four points that show the four succesfull locks, and the initial offset of the fmoderr signal used in Dark Fringe. It can be seen that by the end of the night these offsets become too big to be recovered.

Apart from the fixing of the saturation problem, we have adjusted the tolerance values of the initial fmoderr (reducing them of a factor 10), to try to reduce the offset in Dark Fringe to more reasonable values.

Images attached to this comment
40132_20171123120449_fmoderrtrend.png
AdV-ISC (Commissioning up to first full interferometer lock)
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mantovani, casanueva, fiori - 09:28, Thursday 23 November 2017 (40130)Get code to link to this report
Comment to SSFS gain reduction test (Click here to view original report: 40120)

The gain of the SSFS has been further lowered going from 393.6 to 100 for 300 sec (GPS = 1195460671)

AdV-TCS (CO2 laser projector)
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aiello, fafone, nardecchia, rocchi - 00:50, Thursday 23 November 2017 (40129)Get code to link to this report
DAS settings investigation

The TCS measurements started at 7.30 pm. During this shift we performed some further tests with different DAS settings.

A deep analysis of the data will follow. 

We leave the ITF locked with the DAS ON.

 

Comments related to this report
Aiello, Fafone, Nardecchia, Rocchi - 00:01, Friday 24 November 2017 (40145)

The different tests done yesterday are summarized in the following table (see figure 1).

Test Start (UTC) End (UTC) Power IN (mW) Power OUT (mW)
1 18:51 20:32 150* 300*
2 20:41 22:06 100 WI - 175 NI 200 WI - 350 NI
3 22:13 22:34 200* 400*
4 22:53 -- 100 WI -175 NI 200 WI - 350 NI

* same power applied on West and North CP.

As shown in figure 2 the maximum gain has been reached during the test #2, with differential heating applied to West and North CP.
At first glance, this seems to favour the hypotesis of the presence of a dominant diverging lens in the West CP (in agreement with the behavior of the contrast defect during CH tests, but in disagreement with the behavior of the recycling gain). Till now no clear conclusion, to be better investigated.

In this configuration, the time behavior of the recycling gain does not show the overshoot due to annular heating.

In order to evaluate the DAS power upper limit to maximize the 56 MHz gain, in test #3 the power has been increased up to 200 mW and 400 mW. An overcompensantion has been observed. Thus we decided to leave the ITF with the settings of configuration #2.

Further analyses of the ITF signals are ongoing.
Images attached to this comment
40145_20171123235717_gain1.png 40145_20171123235725_gain2.png
Detector Operation (Operations Report)
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Sposito - 22:59, Wednesday 22 November 2017 (40128)Get code to link to this report
Operator report - Afternoon shift 22/11

Today, the shift was dedicated to TCS activities. During the afternoon we had some problems with the MC that P.Ruggi easily solved. ITF locked at 18.06 UTC and remained stable for the whole shift. Nothing else to report.

22.00 UTC Commissioning mode stopped.

AdV-TCS (CO2 laser projector)
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schaaf, tacca, beuzekom - 19:29, Wednesday 22 November 2017 (40127)Get code to link to this report
Comment to CO2 DAS tests with 17 W power (Click here to view original report: 40096)

Attached the intensity images as seen by the phase camera for the DAS test at 17 W input power.

1. figure shows the overlap between 6 MHz USB and carrier on B4. In shaded blue the time when the DAS was on is indicated, the DAS power is noted in the legend as "inner ring/outer ring" in mW. In black vertical lines give the gpstimes of the images described below. The sudden increase after the black line might be due to a power drop of the ring heaters earlier, see image attached in [40096]. The evolution of the overlap seems not to follow the evolution of the gain for this data set. The overlap increases in both stretches were the DAS is turned on while the gain decreases in the first stretch and is stable in the second stretch [40096].

2. figure shows the images on B4, not in chronological order but for increasing power. In particular the 6 MHz USB sideband seems to improve in shape with the DAS on.

3. figure shows the images on B1p, not in chronological order but for increasing power. Here essentially no changes are observed in any of the fields.

4. figure shows the overlaps on B4 for according data stretch. Effect on upper sidebands is more pronounced than on lower sidebands (in agreement with the 2. figure) while the 6 MHz lower sideband seems very stable. The green band gives a typical standard deviation (roughly 0.01).

Images attached to this comment
40127_20171122185551_gpstimes.png 40127_20171122185602_pcb4dastestp3w.png 40127_20171122185608_pcb1pdastestp3w.png 40127_20171122185617_overlaps.png
AdV-TCS (CO2 laser projector)
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aiello, fafone,nardecchia,rocchi,ruggi - 17:37, Wednesday 22 November 2017 (40117)Get code to link to this report
Comment to DAS tests with P ITF @26.4 W (Click here to view original report: 40115)

Here we report the details of the DAS actuation tests during the yesterday shift. The same power has been applied on both benches.

Test Start (UTC) End (UTC) Power IN (mW) Power OUT (mW)
1 16:04 16:06 200 400
2 16:24 16:40 100 200
3 16:45 17:33 150 300
4 17:33 17:52 175 350
-- 18:04* 19:25* 100* 200*
5 19:40 -- 125 250

*during this measurement the WI laser changed its working point, so the data are not reliable (grey area in the attached plot).

In the white areas the DAS was OFF.

The selected working point (test 5, probably close to the best one) allowed to keep the ITF locked for the all night.

Images attached to this comment
40117_20171122172227_49.png 40117_20171122173710_dasonoff.png
Environmental Monitoring (Environmental Monitoring)
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Allocca, Swinkels - 17:25, Wednesday 22 November 2017 (40126)Get code to link to this report
Comment to 4 kHz line (Click here to view original report: 40123)

The same mirrored line is in fact present in hrec, but at 6 kHz (see attached figure). Since DARM is sampled at 10kHz, this gets aliased at 4kHz.

The origin of this line is still unknown, but most probably it is at 6 kHz rather than 4kHz.

Images attached to this comment
40126_20171122172251_hrecdarmb1aliasing.png
Environmental Monitoring (Environmental Monitoring)
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fiori, paoletti, boschi, cirone - 16:42, Wednesday 22 November 2017 (40125)Get code to link to this report
some sensors reallocation

yesterday we moved and changed the name of some ENV sensors, thi is the list:

sensor old location present location old name new name notes
magnetometer fluxgate WE DSP crate   ENV_WE_RACK_MAG   sensor removed (it was temporary)
accelerometer CEB platform new NI-BS SR tower W flange ENV_NI_PLATFORM_ACC_Y ENV_SR_ACC_Z  the sensor is now back in its assigned location
accelerometer DT cryio trap cold finger DT tower W flange ENV_DT_CT_FINGER_ACC_Y ENV_DT_W_FLANGE_ACC_Z temporary locatio, just for the shaker injections
Detector Operation (Procedures Updates)
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Gherardini - 15:55, Wednesday 22 November 2017 (40124)Get code to link to this report
Operator Report - morning shift 22/11
This morning I found the itf in LOW_NOISE_3 state with the horizon 22Mpc; the ISC activity went on all the morning without any major problem, Julia and Maddalena worked all the shift locking the itf up to LOW_NOISE_3, the lock acquisition sometime fails while moving toward the dark fringe.




Environmental Monitoring (Environmental Monitoring)
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Allocca - 15:36, Wednesday 22 November 2017 (40123)Get code to link to this report
4 kHz line

In the DARM spectrum there is a line at about 4 kHz. In particular, one can notice that from the dark fringe lock on, the frequency of this line starts at a higher value and decreases with an exponential decay until becomes stable, with a trend very similar to the arm cavity powers. (see figure 1)

Moreover, after the input laser power increase of these last days, the frequency of this line went slightly down, as shown in the sequence of figures 2 (input = 16.8W), 3 (input = 20W), 4 (input = 26.7W + DAS on CPs). Notice that the frequency in this last configuration stays the same also when the DAS is off.

The trend of the frequency as a function of the input laser power is reported in figure 5. Notice that the first point has been estimated from the highest frequency at the beginning of the DF lock (the top value of the exponential trend shown in figure 1).

What is remarkable is that this line does not appear in hrec, which probably means that it is subtracted. Maybe identifying  the origin of this line could help in understanding the nature of the power decay fenomenon seen on all the PDs at the beginning of each dark fringe transition.

Finally, notice that this line was also visible during the highest sensitivity periods (figure 6).

Images attached to this report
40123_20171122150817_figure1.png 40123_20171122150827_figure213w.png 40123_20171122150832_figure319w.png 40123_20171122150840_figure525wdas.png 40123_20171122153217_fitfrepow.png 40123_20171122154443_figure631mpc.png
Comments related to this report
Allocca, Swinkels - 17:25, Wednesday 22 November 2017 (40126)

The same mirrored line is in fact present in hrec, but at 6 kHz (see attached figure). Since DARM is sampled at 10kHz, this gets aliased at 4kHz.

The origin of this line is still unknown, but most probably it is at 6 kHz rather than 4kHz.

Images attached to this comment
40126_20171122172251_hrecdarmb1aliasing.png
AdV-TCS (Wavefront sensing)
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schaaf, tacca, beuzekom - 13:06, Wednesday 22 November 2017 (40119)Get code to link to this report
Comment to TM center on the HWS-DET maps (Click here to view original report: 40097)

Images obtained with phase camera while the NI RH is turned on - Gaussianity of the sidebands and contrast defect seem to improve.

1. figure attached shows the power on B4 and B1p as observed with the main diodes. The time at which the ring heater is turned on is indicated in red. The power leaking to the dark port first slightly decreases and then clearly increases with the NI mirror heating up. The blue lines indicate the gpstimes at which the images shown in the following are taken. Note that the steady state is not reached for the image with ring heater on, first image is taken around the time that the ring heater is turned on.

2. figure attached shows the power images on B4. The upper row is the situation with ring heater turned off, the lower once the ring heater is turned on for about 1 hour (as indicated in 1. figure). The images are averaged over 10 s. All sidebands seem to improve in shape, 56 MHz LSB loses power in addition.

3. figure attached shows the power images on B1p. In contrast to when the WI RH was turned on [40093], with only the NI RH turned on the 08 mode survives in the carrier.

4. figure shows the overlaps. Overlap of carrier with 56 MHz LSB monotonically reduces, while the overlap of the carrier with the 56 MHz and 6 MHz upper sidebands go through a maximum. The 6 MHz LSB overlap is quite stable with only a slight reduction while the overlaps between 6 MHz/56MHz USB and LSB are a mixture of the overlaps with the carrier and corresponding sidebands.

5. The sidebands and the carrier on B4 were fitted with an astigmatic Gaussian. The data is better described by the fit when the NI RH is turned on, i.e. the overlap of fit with data increases (see formula in figure). The astigmatism of the sidebands is reducing as well (again formula in figure, r.w.d. in formula is the relative width difference). Improvements are more pronounced than with the WI RH.

Images attached to this comment
40119_20171122123931_nigpstimes.png 40119_20171122123940_nib4.png 40119_20171122123946_nib1p.png 40119_20171122123956_nioverlaps.png 40119_20171122124004_nifittingqualityandastigmatism.png
AdV-ISC (Commissioning up to first full interferometer lock)
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mantovani, casanueva - 12:40, Wednesday 22 November 2017 (40120)Get code to link to this report
SSFS gain reduction test

In order to understand the structures related to the SSFS we have lowered the SSFS gain at the final lock acquisition step from 400 to 300 to 200, see Figure 1 (brown = 400, purple = 300 and blue = 200).

there are several structures that shows a worsening of the corresponding factor in h.

the gps times are:

1195380434 for Gain 400 for 200 sec

1195380742 for Gain 300 for 200 sec

1195381031 for Gain 200 for 200 sec

Images attached to this report
40120_20171122123653_171122ssfsgain.gif
Comments related to this report
mantovani, casanueva, fiori - 09:28, Thursday 23 November 2017 (40130)

The gain of the SSFS has been further lowered going from 393.6 to 100 for 300 sec (GPS = 1195460671)

fiori - 16:58, Thursday 23 November 2017 (40136)

The increase of noise at several peaks is clearly visible during the test of this morning, when the SSFS gain was reduced from 400 to 100: See Figure 1.

Seems that all the Hrec structures that are coherent with SSFS error signal are affected: Figure 2,3,4,5

Images attached to this comment
40136_20171123165701_gainreductiontest.gif 40136_20171123165708_gainreductiontestfft4.gif 40136_20171123165711_gainreductiontestfft3.gif 40136_20171123165718_gainreductiontestfft2.gif 40136_20171123165721_gainreductiontestfft1.gif
AdV-TCS (Wavefront sensing)
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Ballardin, Aiello, Fafone, Nardecchia, Rocchi - 12:06, Wednesday 22 November 2017 (40111)Get code to link to this report
HWS-RC data on DataDisplay

At present the values of curvature extracted by the HWS-RC maps are available on DataDisplay. There are 2 channels for each HWS-RC:

-TCS_HWS_RC_XX_CURV -> shows the behaviour of curvature

-TCS_HWS_RC_XX_STATUS -> shows the status of the acquistion (0 the value is old , 1 the value is updated).

where XX is NI or WI. An example of the curvature trend measured by HWS-DET is shown in the attached plot.

In DataDisplay are also available the channels for the HWS-HR for future integration.

This first version will be updated if needed.

Images attached to this report
40111_20171122120025_tcshwsrcni.jpg